Add benches

## Summary

If a generic appears multiple times on the right-hand side, we should
only include it once on the left-hand side when rewriting.

Closes https://github.com/astral-sh/ruff/issues/9904.

.github/workflows/ci.yaml

@@ -117,10 +117,7 @@ jobs:
           tool: cargo-insta
       - uses: Swatinem/rust-cache@v2
       - name: "Run tests"
-        run: cargo insta test --all --exclude ruff_dev --all-features --unreferenced reject
-      - name: "Run dev tests"
-        # e.g. generating the schema — these should not run with all features enabled
-        run: cargo insta test -p ruff_dev --unreferenced reject
+        run: cargo insta test --all --all-features --unreferenced reject
       # Check for broken links in the documentation.
       - run: cargo doc --all --no-deps
         env:

CHANGELOG.md

@@ -7,7 +7,7 @@ within a source file).
 
 ### Preview features
 
-- \[`refurn`\] Implement `missing-f-string-syntax` (`RUF027`) ([#9728](https://github.com/astral-sh/ruff/pull/9728))
+- \[`refurb`\] Implement `missing-f-string-syntax` (`RUF027`) ([#9728](https://github.com/astral-sh/ruff/pull/9728))
 - Format module-level docstrings ([#9725](https://github.com/astral-sh/ruff/pull/9725))
 
 ### Formatter

CONTRIBUTING.md

@@ -231,7 +231,7 @@ Once you've completed the code for the rule itself, you can define tests with th
     For example, if you're adding a new rule named `E402`, you would run:
 
     ```shell
-    cargo run -p ruff -- check crates/ruff_linter/resources/test/fixtures/pycodestyle/E402.py --no-cache --select E402
+    cargo run -p ruff -- check crates/ruff_linter/resources/test/fixtures/pycodestyle/E402.py --no-cache --preview --select E402
     ```
 
     **Note:** Only a subset of rules are enabled by default. When testing a new rule, ensure that

Cargo.lock

@@ -217,12 +217,12 @@ checksum = "327762f6e5a765692301e5bb513e0d9fef63be86bbc14528052b1cd3e6f03e07"
 
 [[package]]
 name = "bstr"
-version = "1.6.2"
+version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4c2f7349907b712260e64b0afe2f84692af14a454be26187d9df565c7f69266a"
+checksum = "c48f0051a4b4c5e0b6d365cd04af53aeaa209e3cc15ec2cdb69e73cc87fbd0dc"
 dependencies = [
  "memchr",
- "regex-automata 0.3.9",
+ "regex-automata 0.4.3",
  "serde",
 ]
 
@@ -1569,18 +1569,6 @@ version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9fa00462b37ead6d11a82c9d568b26682d78e0477dc02d1966c013af80969739"
 
-[[package]]
-name = "pep440_rs"
-version = "0.3.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "887f66cc62717ea72caac4f1eb4e6f392224da3ffff3f40ec13ab427802746d6"
-dependencies = [
- "lazy_static",
- "regex",
- "serde",
- "unicode-width",
-]
-
 [[package]]
 name = "pep440_rs"
 version = "0.4.0"
@@ -1595,12 +1583,12 @@ dependencies = [
 
 [[package]]
 name = "pep508_rs"
-version = "0.2.1"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c0713d7bb861ca2b7d4c50a38e1f31a4b63a2e2df35ef1e5855cc29e108453e2"
+checksum = "910c513bea0f4f833122321c0f20e8c704e01de98692f6989c2ec21f43d88b1e"
 dependencies = [
  "once_cell",
- "pep440_rs 0.3.12",
+ "pep440_rs",
  "regex",
  "serde",
  "thiserror",
@@ -1780,12 +1768,12 @@ dependencies = [
 
 [[package]]
 name = "pyproject-toml"
-version = "0.8.2"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ef61ae096a2f8c8b49eca360679dbc25f57c99145f6634b6bc18fedb1f9c6c30"
+checksum = "95c3dd745f99aa3c554b7bb00859f7d18c2f1d6afd749ccc86d60b61e702abd9"
 dependencies = [
  "indexmap",
- "pep440_rs 0.4.0",
+ "pep440_rs",
  "pep508_rs",
  "serde",
  "toml",
@@ -1933,12 +1921,6 @@ dependencies = [
  "regex-syntax 0.6.29",
 ]
 
-[[package]]
-name = "regex-automata"
-version = "0.3.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "59b23e92ee4318893fa3fe3e6fb365258efbfe6ac6ab30f090cdcbb7aa37efa9"
-
 [[package]]
 name = "regex-automata"
 version = "0.4.3"
@@ -2189,7 +2171,7 @@ dependencies = [
  "once_cell",
  "path-absolutize",
  "pathdiff",
- "pep440_rs 0.4.0",
+ "pep440_rs",
  "pretty_assertions",
  "pyproject-toml",
  "quick-junit",
@@ -2277,7 +2259,6 @@ dependencies = [
  "rustc-hash",
  "serde",
  "smallvec",
- "static_assertions",
 ]
 
 [[package]]
@@ -2355,16 +2336,22 @@ version = "0.0.0"
 dependencies = [
  "anyhow",
  "bitflags 2.4.1",
+ "bstr",
+ "codspeed-criterion-compat",
+ "criterion",
  "insta",
  "is-macro",
  "itertools 0.12.1",
  "lalrpop",
  "lalrpop-util",
  "memchr",
+ "mimalloc",
+ "once_cell",
  "ruff_python_ast",
  "ruff_text_size",
  "rustc-hash",
  "static_assertions",
+ "tikv-jemallocator",
  "tiny-keccak",
  "unicode-ident",
  "unicode_names2",
@@ -2494,7 +2481,7 @@ dependencies = [
  "log",
  "once_cell",
  "path-absolutize",
- "pep440_rs 0.4.0",
+ "pep440_rs",
  "regex",
  "ruff_cache",
  "ruff_formatter",

Cargo.toml

@@ -19,6 +19,7 @@ argfile = { version = "0.1.6" }
 assert_cmd = { version = "2.0.13" }
 bincode = { version = "1.3.3" }
 bitflags = { version = "2.4.1" }
+bstr = { version = "1.9.0" }
 cachedir = { version = "0.3.1" }
 chrono = { version = "0.4.33", default-features = false, features = ["clock"] }
 clap = { version = "4.4.18", features = ["derive"] }
@@ -65,7 +66,7 @@ pathdiff = { version = "0.2.1" }
 pep440_rs = { version = "0.4.0", features = ["serde"] }
 pretty_assertions = "1.3.0"
 proc-macro2 = { version = "1.0.78" }
-pyproject-toml = { version = "0.8.2" }
+pyproject-toml = { version = "0.9.0" }
 quick-junit = { version = "0.3.5" }
 quote = { version = "1.0.23" }
 rand = { version = "0.8.5" }

crates/ruff/src/commands/show_settings.rs

@@ -31,9 +31,9 @@ pub(crate) fn show_settings(
 
     let settings = resolver.resolve(&path);
 
-    writeln!(writer, "Resolved settings for: {path:?}")?;
+    writeln!(writer, "Resolved settings for: \"{}\"", path.display())?;
     if let Some(settings_path) = pyproject_config.path.as_ref() {
-        writeln!(writer, "Settings path: {settings_path:?}")?;
+        writeln!(writer, "Settings path: \"{}\"", settings_path.display())?;
     }
     write!(writer, "{settings}")?;
 

crates/ruff/tests/show_settings.rs

@@ -4,25 +4,29 @@ use std::process::Command;
 
 const BIN_NAME: &str = "ruff";
 
-#[cfg(not(target_os = "windows"))]
-const TEST_FILTERS: &[(&str, &str)] = &[
-    ("\"[^\\*\"]*/pyproject.toml", "\"[BASEPATH]/pyproject.toml"),
-    ("\".*/crates", "\"[BASEPATH]/crates"),
-    ("\".*/\\.ruff_cache", "\"[BASEPATH]/.ruff_cache"),
-    ("\".*/ruff\"", "\"[BASEPATH]\""),
-];
-#[cfg(target_os = "windows")]
-const TEST_FILTERS: &[(&str, &str)] = &[
-    (r#""[^\*"]*\\pyproject.toml"#, "\"[BASEPATH]/pyproject.toml"),
-    (r#"".*\\crates"#, "\"[BASEPATH]/crates"),
-    (r#"".*\\\.ruff_cache"#, "\"[BASEPATH]/.ruff_cache"),
-    (r#"".*\\ruff""#, "\"[BASEPATH]\""),
-    (r#"\\+(\w\w|\s|")"#, "/$1"),
-];
-
 #[test]
 fn display_default_settings() {
-    insta::with_settings!({ filters => TEST_FILTERS.to_vec() }, {
+    // Navigate from the crate directory to the workspace root.
+    let base_path = Path::new(env!("CARGO_MANIFEST_DIR"))
+        .parent()
+        .unwrap()
+        .parent()
+        .unwrap();
+    let base_path = base_path.to_string_lossy();
+
+    // Escape the backslashes for the regex.
+    let base_path = regex::escape(&base_path);
+
+    #[cfg(not(target_os = "windows"))]
+    let test_filters = &[(base_path.as_ref(), "[BASEPATH]")];
+
+    #[cfg(target_os = "windows")]
+    let test_filters = &[
+        (base_path.as_ref(), "[BASEPATH]"),
+        (r#"\\+(\w\w|\s|\.|")"#, "/$1"),
+    ];
+
+    insta::with_settings!({ filters => test_filters.to_vec() }, {
         assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
             .args(["check", "--show-settings", "unformatted.py"]).current_dir(Path::new("./resources/test/fixtures")));
     });

crates/ruff/tests/snapshots/show_settings__display_default_settings.snap

@@ -205,7 +205,9 @@ linter.external = []
 linter.ignore_init_module_imports = false
 linter.logger_objects = []
 linter.namespace_packages = []
-linter.src = ["[BASEPATH]"]
+linter.src = [
+	"[BASEPATH]",
+]
 linter.tab_size = 4
 linter.line_length = 88
 linter.task_tags = [

crates/ruff_formatter/src/printer/line_suffixes.rs

@@ -21,8 +21,7 @@ impl<'a> LineSuffixes<'a> {
     /// Takes all the pending line suffixes.
     pub(super) fn take_pending<'l>(
         &'l mut self,
-    ) -> impl Iterator<Item = LineSuffixEntry<'a>> + DoubleEndedIterator + 'l + ExactSizeIterator
-    {
+    ) -> impl DoubleEndedIterator<Item = LineSuffixEntry<'a>> + 'l + ExactSizeIterator {
         self.suffixes.drain(..)
     }
 

crates/ruff_linter/resources/test/fixtures/flake8_bandit/S308.py

@@ -0,0 +1,22 @@
+from django.utils.safestring import mark_safe
+
+
+def some_func():
+    return mark_safe('<script>alert("evil!")</script>')
+
+
+@mark_safe
+def some_func():
+    return '<script>alert("evil!")</script>'
+
+
+from django.utils.html import mark_safe
+
+
+def some_func():
+    return mark_safe('<script>alert("evil!")</script>')
+
+
+@mark_safe
+def some_func():
+    return '<script>alert("evil!")</script>'

crates/ruff_linter/resources/test/fixtures/flake8_trio/TRIO100.py

@@ -1,18 +1,27 @@
 import trio
 
 
-async def foo():
+async def func():
     with trio.fail_after():
         ...
 
-async def foo():
+
+async def func():
     with trio.fail_at():
         await ...
 
-async def foo():
+
+async def func():
     with trio.move_on_after():
         ...
 
-async def foo():
+
+async def func():
     with trio.move_at():
         await ...
+
+
+async def func():
+    with trio.move_at():
+        async with trio.open_nursery() as nursery:
+            ...

crates/ruff_linter/resources/test/fixtures/numpy/NPY002.py

@@ -19,8 +19,11 @@ numpy.random.seed()
 numpy.random.get_state()
 numpy.random.set_state()
 numpy.random.rand()
+numpy.random.ranf()
+numpy.random.sample()
 numpy.random.randn()
 numpy.random.randint()
+numpy.random.random()
 numpy.random.random_integers()
 numpy.random.random_sample()
 numpy.random.choice()
@@ -35,7 +38,6 @@ numpy.random.exponential()
 numpy.random.f()
 numpy.random.gamma()
 numpy.random.geometric()
-numpy.random.get_state()
 numpy.random.gumbel()
 numpy.random.hypergeometric()
 numpy.random.laplace()

crates/ruff_linter/resources/test/fixtures/pycodestyle/E30.py

@@ -0,0 +1,848 @@
+"""Fixtures for the errors E301, E302, E303, E304, E305 and E306.
+Since these errors are about new lines, each test starts with either "No error" or "# E30X".
+Each test's end is signaled by a "# end" line.
+There should be no E30X error outside of a test's bound.
+"""
+
+
+# No error
+class Class:
+    pass
+# end
+
+
+# No error
+class Class:
+    """Docstring"""
+    def __init__(self) -> None:
+        pass
+# end
+
+
+# No error
+def func():
+    pass
+# end
+
+
+# No error
+# comment
+class Class:
+    pass
+# end
+
+
+# No error
+# comment
+def func():
+    pass
+# end
+
+
+# no error
+def foo():
+    pass
+
+
+def bar():
+    pass
+
+
+class Foo(object):
+    pass
+
+
+class Bar(object):
+    pass
+# end
+
+
+# No error
+class Class(object):
+
+    def func1():
+        pass
+
+    def func2():
+        pass
+# end
+
+
+# No error
+class Class(object):
+
+    def func1():
+        pass
+
+# comment
+    def func2():
+        pass
+# end
+
+
+# No error
+class Class:
+
+    def func1():
+        pass
+
+    # comment
+    def func2():
+        pass
+
+    # This is a
+    # ... multi-line comment
+
+    def func3():
+        pass
+
+
+# This is a
+# ... multi-line comment
+
+@decorator
+class Class:
+
+    def func1():
+        pass
+
+    # comment
+
+    def func2():
+        pass
+
+    @property
+    def func3():
+        pass
+
+# end
+
+
+# No error
+try:
+    from nonexistent import Bar
+except ImportError:
+    class Bar(object):
+        """This is a Bar replacement"""
+# end
+
+
+# No error
+def with_feature(f):
+    """Some decorator"""
+    wrapper = f
+    if has_this_feature(f):
+        def wrapper(*args):
+            call_feature(args[0])
+            return f(*args)
+    return wrapper
+# end
+
+
+# No error
+try:
+    next
+except NameError:
+    def next(iterator, default):
+        for item in iterator:
+            return item
+        return default
+# end
+
+
+# No error
+def fn():
+    pass
+
+
+class Foo():
+    """Class Foo"""
+
+    def fn():
+
+        pass
+# end
+
+
+# No error
+# comment
+def c():
+    pass
+
+
+# comment
+
+
+def d():
+    pass
+
+# This is a
+# ... multi-line comment
+
+# And this one is
+# ... a second paragraph
+# ... which spans on 3 lines
+
+
+# Function `e` is below
+# NOTE: Hey this is a testcase
+
+def e():
+    pass
+
+
+def fn():
+    print()
+
+    # comment
+
+    print()
+
+    print()
+
+# Comment 1
+
+# Comment 2
+
+
+# Comment 3
+
+def fn2():
+
+    pass
+# end
+
+
+# no error
+if __name__ == '__main__':
+    foo()
+# end
+
+
+# no error
+defaults = {}
+defaults.update({})
+# end
+
+
+# no error
+def foo(x):
+    classification = x
+    definitely = not classification
+# end
+
+
+# no error
+def bar(): pass
+def baz(): pass
+# end
+
+
+# no error
+def foo():
+    def bar(): pass
+    def baz(): pass
+# end
+
+
+# no error
+from typing import overload
+from typing import Union
+# end
+
+
+# no error
+@overload
+def f(x: int) -> int: ...
+@overload
+def f(x: str) -> str: ...
+# end
+
+
+# no error
+def f(x: Union[int, str]) -> Union[int, str]:
+    return x
+# end
+
+
+# no error
+from typing import Protocol
+
+
+class C(Protocol):
+    @property
+    def f(self) -> int: ...
+    @property
+    def g(self) -> str: ...
+# end
+
+
+# no error
+def f(
+    a,
+):
+    pass
+# end
+
+
+# no error
+if True:
+    class Class:
+        """Docstring"""
+
+        def function(self):
+            ...
+# end
+
+
+# no error
+if True:
+    def function(self):
+        ...
+# end
+
+
+# no error
+@decorator
+# comment
+@decorator
+def function():
+    pass
+# end
+
+
+# no error
+class Class:
+    def method(self):
+        if True:
+            def function():
+                pass
+# end
+
+
+# no error
+@decorator
+async def function(data: None) -> None:
+    ...
+# end
+
+
+# no error
+class Class:
+    def method():
+        """docstring"""
+        # comment
+        def function():
+            pass
+# end
+
+
+# no error
+try:
+    if True:
+        # comment
+        class Class:
+            pass
+
+except:
+    pass
+# end
+
+
+# no error
+def f():
+    def f():
+        pass
+# end
+
+
+# no error
+class MyClass:
+    # comment
+    def method(self) -> None:
+        pass
+# end
+
+
+# no error
+def function1():
+    # Comment
+    def function2():
+        pass
+# end
+
+
+# no error
+async def function1():
+    await function2()
+    async with function3():
+        pass
+# end
+
+
+# no error
+if (
+    cond1
+
+
+
+
+    and cond2
+):
+    pass
+#end
+
+
+# no error
+async def function1():
+  await function2()
+  async with function3():
+    pass
+# end
+
+
+# no error
+async def function1():
+	await function2()
+	async with function3():
+		pass
+# end
+
+
+# no error
+async def function1():
+	await function2()
+    async with function3():
+    	pass
+# end
+
+
+# no error
+class Test:
+    async
+
+    def a(self): pass
+# end
+
+
+# no error
+class Test:
+    def a():
+        pass
+# wrongly indented comment
+
+    def b():
+        pass
+# end
+
+
+# no error
+def test():
+    pass
+  
+  # Wrongly indented comment
+    pass
+# end
+
+
+# E301
+class Class(object):
+
+    def func1():
+        pass
+    def func2():
+        pass
+# end
+
+
+# E301
+class Class:
+
+    def fn1():
+        pass
+    # comment
+    def fn2():
+        pass
+# end
+
+
+# E302
+"""Main module."""
+def fn():
+    pass
+# end
+
+
+# E302
+import sys
+def get_sys_path():
+    return sys.path
+# end
+
+
+# E302
+def a():
+    pass
+
+def b():
+    pass
+# end
+
+
+# E302
+def a():
+    pass
+
+# comment
+
+def b():
+    pass
+# end
+
+
+# E302
+def a():
+    pass
+
+async def b():
+    pass
+# end
+
+
+# E302
+async  def x():
+    pass
+
+async  def x(y: int = 1):
+    pass
+# end
+
+
+# E302
+def bar():
+    pass
+def baz(): pass
+# end
+
+
+# E302
+def bar(): pass
+def baz():
+    pass
+# end
+
+
+# E302
+def f():
+    pass
+
+# comment
+@decorator
+def g():
+    pass
+# end
+
+
+# E302
+class Test:
+	
+	pass
+	
+	def method1():
+		return 1
+		
+		
+	def method2():
+		return 22
+# end
+
+
+# E303
+def fn():
+    _ = None
+
+
+    # arbitrary comment
+
+    def inner():  # E306 not expected (pycodestyle detects E306)
+        pass
+# end
+
+
+# E303
+def fn():
+    _ = None
+
+
+    # arbitrary comment
+    def inner():  # E306 not expected (pycodestyle detects E306)
+        pass
+# end
+
+
+# E303
+print()
+
+
+
+print()
+# end
+
+
+# E303:5:1
+print()
+
+
+
+# comment
+
+print()
+# end
+
+
+# E303:5:5 E303:8:5
+def a():
+    print()
+
+
+    # comment
+
+
+    # another comment
+
+    print()
+# end
+
+
+# E303
+#!python
+
+
+
+"""This class docstring comes on line 5.
+It gives error E303: too many blank lines (3)
+"""
+# end
+
+
+# E303
+class Class:
+    def a(self):
+        pass
+
+
+    def b(self):
+        pass
+# end
+
+
+# E303
+if True:
+    a = 1
+
+
+    a = 2
+# end
+
+
+# E303
+class Test:
+
+
+    # comment
+
+
+    # another comment
+
+    def test(self): pass
+# end
+
+
+# E303
+class Test:
+    def a(self):
+        pass
+
+# wrongly indented comment
+
+
+    def b(self):
+        pass
+# end
+
+
+# E303
+def fn():
+    pass
+
+ 
+    pass
+# end
+
+
+# E304
+@decorator
+
+def function():
+    pass
+# end
+
+
+# E304
+@decorator
+
+# comment    E304 not expected
+def function():
+    pass
+# end
+
+
+# E304
+@decorator
+
+# comment  E304 not expected
+
+
+# second comment  E304 not expected
+def function():
+    pass
+# end
+
+
+# E305:7:1
+def fn():
+    print()
+
+    # comment
+
+    # another comment
+fn()
+# end
+
+
+# E305
+class Class():
+    pass
+
+    # comment
+
+    # another comment
+a = 1
+# end
+
+
+# E305:8:1
+def fn():
+    print()
+
+    # comment
+
+    # another comment
+
+try:
+    fn()
+except Exception:
+    pass
+# end
+
+
+# E305:5:1
+def a():
+    print()
+
+# Two spaces before comments, too.
+if a():
+    a()
+# end
+
+
+#: E305:8:1
+# Example from https://github.com/PyCQA/pycodestyle/issues/400
+import stuff
+
+
+def main():
+    blah, blah
+
+if __name__ == '__main__':
+    main()
+# end
+
+
+# E306:3:5
+def a():
+    x = 1
+    def b():
+        pass
+# end
+
+
+#: E306:3:5
+async def a():
+    x = 1
+    def b():
+        pass
+# end
+
+
+#: E306:3:5 E306:5:9
+def a():
+    x = 2
+    def b():
+        x = 1
+        def c():
+            pass
+# end
+
+
+# E306:3:5 E306:6:5
+def a():
+    x = 1
+    class C:
+        pass
+    x = 2
+    def b():
+        pass
+# end
+
+
+# E306
+def foo():
+    def bar():
+        pass
+    def baz(): pass
+# end
+
+
+# E306:3:5
+def foo():
+    def bar(): pass
+    def baz():
+        pass
+# end
+
+
+# E306
+def a():
+    x = 2
+    @decorator
+    def b():
+        pass
+# end
+
+
+# E306
+def a():
+    x = 2
+    @decorator
+    async def b():
+        pass
+# end
+
+
+# E306
+def a():
+    x = 2
+    async def b():
+        pass
+# end

crates/ruff_linter/resources/test/fixtures/pycodestyle/W291.py

@@ -1,2 +1,15 @@
 '''trailing whitespace 
 inside a multiline string'''
+
+f'''trailing whitespace 
+inside a multiline f-string'''
+
+# Trailing whitespace after `{`
+f'abc { 
+    1 + 2
+}'
+
+# Trailing whitespace after `2`
+f'abc {
+    1 + 2 
+}'

crates/ruff_linter/resources/test/fixtures/pydocstyle/sections.py

@@ -562,3 +562,46 @@ def titlecase_sub_section_header():
 
         Returns:
     """
+
+
+def test_method_should_be_correctly_capitalized(parameters: list[str], other_parameters: dict[str, str]): # noqa: D213
+    """Test parameters and attributes sections are capitalized correctly.
+
+    Parameters
+    ----------
+    parameters:
+        A list of string parameters
+    other_parameters:
+        A dictionary of string attributes
+
+    Other Parameters
+    ----------
+    other_parameters:
+        A dictionary of string attributes
+    parameters:
+        A list of string parameters
+
+    """
+
+
+def test_lowercase_sub_section_header_should_be_valid(parameters: list[str], value: int):  # noqa: D213
+    """Test that lower case subsection header is valid even if it has the same name as section kind.
+
+    Parameters:
+    ----------
+    parameters:
+        A list of string parameters
+    value:
+        Some value
+    """
+
+
+def test_lowercase_sub_section_header_different_kind(returns: int):
+   """Test that lower case subsection header is valid even if it is of a different kind.
+
+   Parameters
+   -‐-----------------
+   returns:
+       some value
+
+   """

crates/ruff_linter/resources/test/fixtures/pyupgrade/UP040.py

@@ -46,3 +46,8 @@ x: typing.TypeAlias = list[T]
 # OK
 x: TypeAlias
 x: int = 1
+
+# Ensure that "T" appears only once  in the type parameters for the modernized
+# type alias.
+T = typing.TypeVar["T"]
+Decorator: TypeAlias = typing.Callable[[T], T]

crates/ruff_linter/resources/test/fixtures/ruff/RUF027.py

@@ -1,85 +0,0 @@
-val = 2
-
-def simple_cases():
-    a = 4
-    b = "{a}" # RUF027
-    c = "{a} {b} f'{val}' " # RUF027
-
-def escaped_string():
-    a = 4
-    b = "escaped string: {{ brackets surround me }}" # RUF027
-
-def raw_string():
-    a = 4
-    b = r"raw string with formatting: {a}" # RUF027
-    c = r"raw string with \backslashes\ and \"escaped quotes\": {a}" # RUF027
-
-def print_name(name: str):
-    a = 4
-    print("Hello, {name}!") # RUF027
-    print("The test value we're using today is {a}") # RUF027
-
-def do_nothing(a):
-    return a
-
-def nested_funcs():
-    a = 4
-    print(do_nothing(do_nothing("{a}"))) # RUF027
-
-def tripled_quoted():
-    a = 4
-    c = a
-    single_line = """ {a} """ # RUF027
-    # RUF027
-    multi_line = a = """b { # comment
-    c}  d
-    """
-    
-def single_quoted_multi_line():
-    a = 4
-    # RUF027
-    b = " {\
-    a} \
-    "
-
-def implicit_concat():
-    a = 4
-    b = "{a}" "+" "{b}" r" \\ " # RUF027 for the first part only
-    print(f"{a}" "{a}" f"{b}") # RUF027
-
-def escaped_chars():
-    a = 4
-    b = "\"not escaped:\" \'{a}\' \"escaped:\": \'{{c}}\'" # RUF027
-
-def alternative_formatter(src, **kwargs):
-    src.format(**kwargs)
-
-def format2(src, *args):
-    pass
-
-# These should not cause an RUF027 message
-def negative_cases():
-    a = 4
-    positive = False
-    """{a}"""
-    "don't format: {a}"
-    c = """  {b} """
-    d = "bad variable: {invalid}"
-    e = "incorrect syntax: {}"
-    json = "{ positive: false }"
-    json2 = "{ 'positive': false }"
-    json3 = "{ 'positive': 'false' }"
-    alternative_formatter("{a}", a = 5)
-    formatted = "{a}".fmt(a = 7)
-    print(do_nothing("{a}".format(a=3)))
-    print(do_nothing(alternative_formatter("{a}", a = 5)))
-    print(format(do_nothing("{a}"), a = 5))
-    print("{a}".to_upper())
-    print(do_nothing("{a}").format(a = "Test"))
-    print(do_nothing("{a}").format2(a))
-
-a = 4
-
-"always ignore this: {a}"
-
-print("but don't ignore this: {val}") # RUF027

crates/ruff_linter/resources/test/fixtures/ruff/RUF027_0.py

@@ -0,0 +1,70 @@
+val = 2
+
+"always ignore this: {val}"
+
+print("but don't ignore this: {val}")  # RUF027
+
+
+def simple_cases():
+    a = 4
+    b = "{a}"  # RUF027
+    c = "{a} {b} f'{val}' "  # RUF027
+
+
+def escaped_string():
+    a = 4
+    b = "escaped string: {{ brackets surround me }}"  # RUF027
+
+
+def raw_string():
+    a = 4
+    b = r"raw string with formatting: {a}"  # RUF027
+    c = r"raw string with \backslashes\ and \"escaped quotes\": {a}"  # RUF027
+
+
+def print_name(name: str):
+    a = 4
+    print("Hello, {name}!")  # RUF027
+    print("The test value we're using today is {a}")  # RUF027
+
+
+def nested_funcs():
+    a = 4
+    print(do_nothing(do_nothing("{a}")))  # RUF027
+
+
+def tripled_quoted():
+    a = 4
+    c = a
+    single_line = """ {a} """  # RUF027
+    # RUF027
+    multi_line = a = """b { # comment
+    c}  d
+    """
+
+
+def single_quoted_multi_line():
+    a = 4
+    # RUF027
+    b = " {\
+    a} \
+    "
+
+
+def implicit_concat():
+    a = 4
+    b = "{a}" "+" "{b}" r" \\ "  # RUF027 for the first part only
+    print(f"{a}" "{a}" f"{b}")  # RUF027
+
+
+def escaped_chars():
+    a = 4
+    b = "\"not escaped:\" '{a}' \"escaped:\": '{{c}}'"  # RUF027
+
+
+def method_calls():
+    value = {}
+    value.method = print_name
+    first = "Wendy"
+    last = "Appleseed"
+    value.method("{first} {last}")  # RUF027

crates/ruff_linter/resources/test/fixtures/ruff/RUF027_1.py

@@ -0,0 +1,36 @@
+def do_nothing(a):
+    return a
+
+
+def alternative_formatter(src, **kwargs):
+    src.format(**kwargs)
+
+
+def format2(src, *args):
+    pass
+
+
+# These should not cause an RUF027 message
+def negative_cases():
+    a = 4
+    positive = False
+    """{a}"""
+    "don't format: {a}"
+    c = """  {b} """
+    d = "bad variable: {invalid}"
+    e = "incorrect syntax: {}"
+    f = "uses a builtin: {max}"
+    json = "{ positive: false }"
+    json2 = "{ 'positive': false }"
+    json3 = "{ 'positive': 'false' }"
+    alternative_formatter("{a}", a=5)
+    formatted = "{a}".fmt(a=7)
+    print(do_nothing("{a}".format(a=3)))
+    print(do_nothing(alternative_formatter("{a}", a=5)))
+    print(format(do_nothing("{a}"), a=5))
+    print("{a}".to_upper())
+    print(do_nothing("{a}").format(a="Test"))
+    print(do_nothing("{a}").format2(a))
+    print(("{a}" "{c}").format(a=1, c=2))
+    print("{a}".attribute.chaining.call(a=2))
+    print("{a} {c}".format(a))

crates/ruff_linter/src/checkers/ast/analyze/statement.rs

@@ -247,6 +247,11 @@ pub(crate) fn statement(stmt: &Stmt, checker: &mut Checker) {
             if checker.enabled(Rule::HardcodedPasswordDefault) {
                 flake8_bandit::rules::hardcoded_password_default(checker, parameters);
             }
+            if checker.enabled(Rule::SuspiciousMarkSafeUsage) {
+                for decorator in decorator_list {
+                    flake8_bandit::rules::suspicious_function_decorator(checker, decorator);
+                }
+            }
             if checker.enabled(Rule::PropertyWithParameters) {
                 pylint::rules::property_with_parameters(checker, stmt, decorator_list, parameters);
             }

crates/ruff_linter/src/checkers/ast/mod.rs

@@ -31,8 +31,8 @@ use std::path::Path;
 use itertools::Itertools;
 use log::debug;
 use ruff_python_ast::{
-    self as ast, Arguments, Comprehension, ElifElseClause, ExceptHandler, Expr, ExprContext,
-    Keyword, MatchCase, Parameter, ParameterWithDefault, Parameters, Pattern, Stmt, Suite, UnaryOp,
+    self as ast, Comprehension, ElifElseClause, ExceptHandler, Expr, ExprContext, Keyword,
+    MatchCase, Parameter, ParameterWithDefault, Parameters, Pattern, Stmt, Suite, UnaryOp,
 };
 use ruff_text_size::{Ranged, TextRange, TextSize};
 
@@ -989,12 +989,7 @@ where
             }
             Expr::Call(ast::ExprCall {
                 func,
-                arguments:
-                    Arguments {
-                        args,
-                        keywords,
-                        range: _,
-                    },
+                arguments,
                 range: _,
             }) => {
                 self.visit_expr(func);
@@ -1037,7 +1032,7 @@ where
                 });
                 match callable {
                     Some(typing::Callable::Bool) => {
-                        let mut args = args.iter();
+                        let mut args = arguments.args.iter();
                         if let Some(arg) = args.next() {
                             self.visit_boolean_test(arg);
                         }
@@ -1046,7 +1041,7 @@ where
                         }
                     }
                     Some(typing::Callable::Cast) => {
-                        let mut args = args.iter();
+                        let mut args = arguments.args.iter();
                         if let Some(arg) = args.next() {
                             self.visit_type_definition(arg);
                         }
@@ -1055,7 +1050,7 @@ where
                         }
                     }
                     Some(typing::Callable::NewType) => {
-                        let mut args = args.iter();
+                        let mut args = arguments.args.iter();
                         if let Some(arg) = args.next() {
                             self.visit_non_type_definition(arg);
                         }
@@ -1064,21 +1059,21 @@ where
                         }
                     }
                     Some(typing::Callable::TypeVar) => {
-                        let mut args = args.iter();
+                        let mut args = arguments.args.iter();
                         if let Some(arg) = args.next() {
                             self.visit_non_type_definition(arg);
                         }
                         for arg in args {
                             self.visit_type_definition(arg);
                         }
-                        for keyword in keywords {
+                        for keyword in arguments.keywords.iter() {
                             let Keyword {
                                 arg,
                                 value,
                                 range: _,
                             } = keyword;
                             if let Some(id) = arg {
-                                if id == "bound" {
+                                if id.as_str() == "bound" {
                                     self.visit_type_definition(value);
                                 } else {
                                     self.visit_non_type_definition(value);
@@ -1088,7 +1083,7 @@ where
                     }
                     Some(typing::Callable::NamedTuple) => {
                         // Ex) NamedTuple("a", [("a", int)])
-                        let mut args = args.iter();
+                        let mut args = arguments.args.iter();
                         if let Some(arg) = args.next() {
                             self.visit_non_type_definition(arg);
                         }
@@ -1117,7 +1112,7 @@ where
                             }
                         }
 
-                        for keyword in keywords {
+                        for keyword in arguments.keywords.iter() {
                             let Keyword { arg, value, .. } = keyword;
                             match (arg.as_ref(), value) {
                                 // Ex) NamedTuple("a", **{"a": int})
@@ -1144,7 +1139,7 @@ where
                     }
                     Some(typing::Callable::TypedDict) => {
                         // Ex) TypedDict("a", {"a": int})
-                        let mut args = args.iter();
+                        let mut args = arguments.args.iter();
                         if let Some(arg) = args.next() {
                             self.visit_non_type_definition(arg);
                         }
@@ -1167,13 +1162,13 @@ where
                         }
 
                         // Ex) TypedDict("a", a=int)
-                        for keyword in keywords {
+                        for keyword in arguments.keywords.iter() {
                             let Keyword { value, .. } = keyword;
                             self.visit_type_definition(value);
                         }
                     }
                     Some(typing::Callable::MypyExtension) => {
-                        let mut args = args.iter();
+                        let mut args = arguments.args.iter();
                         if let Some(arg) = args.next() {
                             // Ex) DefaultNamedArg(bool | None, name="some_prop_name")
                             self.visit_type_definition(arg);
@@ -1181,13 +1176,13 @@ where
                             for arg in args {
                                 self.visit_non_type_definition(arg);
                             }
-                            for keyword in keywords {
+                            for keyword in arguments.keywords.iter() {
                                 let Keyword { value, .. } = keyword;
                                 self.visit_non_type_definition(value);
                             }
                         } else {
                             // Ex) DefaultNamedArg(type="bool", name="some_prop_name")
-                            for keyword in keywords {
+                            for keyword in arguments.keywords.iter() {
                                 let Keyword {
                                     value,
                                     arg,
@@ -1205,10 +1200,10 @@ where
                         // If we're in a type definition, we need to treat the arguments to any
                         // other callables as non-type definitions (i.e., we don't want to treat
                         // any strings as deferred type definitions).
-                        for arg in args {
+                        for arg in arguments.args.iter() {
                             self.visit_non_type_definition(arg);
                         }
-                        for keyword in keywords {
+                        for keyword in arguments.keywords.iter() {
                             let Keyword { value, .. } = keyword;
                             self.visit_non_type_definition(value);
                         }

crates/ruff_linter/src/checkers/logical_lines.rs

@@ -1,3 +1,4 @@
+use crate::line_width::IndentWidth;
 use ruff_diagnostics::Diagnostic;
 use ruff_python_codegen::Stylist;
 use ruff_python_parser::lexer::LexResult;
@@ -15,11 +16,11 @@ use crate::rules::pycodestyle::rules::logical_lines::{
 use crate::settings::LinterSettings;
 
 /// Return the amount of indentation, expanding tabs to the next multiple of the settings' tab size.
-fn expand_indent(line: &str, settings: &LinterSettings) -> usize {
+pub(crate) fn expand_indent(line: &str, indent_width: IndentWidth) -> usize {
     let line = line.trim_end_matches(['\n', '\r']);
 
     let mut indent = 0;
-    let tab_size = settings.tab_size.as_usize();
+    let tab_size = indent_width.as_usize();
     for c in line.bytes() {
         match c {
             b'\t' => indent = (indent / tab_size) * tab_size + tab_size,
@@ -85,7 +86,7 @@ pub(crate) fn check_logical_lines(
             TextRange::new(locator.line_start(first_token.start()), first_token.start())
         };
 
-        let indent_level = expand_indent(locator.slice(range), settings);
+        let indent_level = expand_indent(locator.slice(range), settings.tab_size);
 
         let indent_size = 4;
 

crates/ruff_linter/src/checkers/tokens.rs

@@ -4,6 +4,7 @@ use std::path::Path;
 
 use ruff_notebook::CellOffsets;
 use ruff_python_ast::PySourceType;
+use ruff_python_codegen::Stylist;
 use ruff_python_parser::lexer::LexResult;
 use ruff_python_parser::Tok;
 
@@ -14,6 +15,7 @@ use ruff_source_file::Locator;
 use crate::directives::TodoComment;
 use crate::lex::docstring_detection::StateMachine;
 use crate::registry::{AsRule, Rule};
+use crate::rules::pycodestyle::rules::BlankLinesChecker;
 use crate::rules::ruff::rules::Context;
 use crate::rules::{
     eradicate, flake8_commas, flake8_executable, flake8_fixme, flake8_implicit_str_concat,
@@ -21,17 +23,37 @@ use crate::rules::{
 };
 use crate::settings::LinterSettings;
 
+#[allow(clippy::too_many_arguments)]
 pub(crate) fn check_tokens(
     tokens: &[LexResult],
     path: &Path,
     locator: &Locator,
     indexer: &Indexer,
+    stylist: &Stylist,
     settings: &LinterSettings,
     source_type: PySourceType,
     cell_offsets: Option<&CellOffsets>,
 ) -> Vec<Diagnostic> {
     let mut diagnostics: Vec<Diagnostic> = vec![];
 
+    if settings.rules.any_enabled(&[
+        Rule::BlankLineBetweenMethods,
+        Rule::BlankLinesTopLevel,
+        Rule::TooManyBlankLines,
+        Rule::BlankLineAfterDecorator,
+        Rule::BlankLinesAfterFunctionOrClass,
+        Rule::BlankLinesBeforeNestedDefinition,
+    ]) {
+        let mut blank_lines_checker = BlankLinesChecker::default();
+        blank_lines_checker.check_lines(
+            tokens,
+            locator,
+            stylist,
+            settings.tab_size,
+            &mut diagnostics,
+        );
+    }
+
     if settings.rules.enabled(Rule::BlanketNOQA) {
         pygrep_hooks::rules::blanket_noqa(&mut diagnostics, indexer, locator);
     }
@@ -95,7 +117,7 @@ pub(crate) fn check_tokens(
     }
 
     if settings.rules.enabled(Rule::TabIndentation) {
-        pycodestyle::rules::tab_indentation(&mut diagnostics, tokens, locator, indexer);
+        pycodestyle::rules::tab_indentation(&mut diagnostics, locator, indexer);
     }
 
     if settings.rules.any_enabled(&[

crates/ruff_linter/src/codes.rs

@@ -137,6 +137,12 @@ pub fn code_to_rule(linter: Linter, code: &str) -> Option<(RuleGroup, Rule)> {
         (Pycodestyle, "E274") => (RuleGroup::Nursery, rules::pycodestyle::rules::logical_lines::TabBeforeKeyword),
         #[allow(deprecated)]
         (Pycodestyle, "E275") => (RuleGroup::Nursery, rules::pycodestyle::rules::logical_lines::MissingWhitespaceAfterKeyword),
+        (Pycodestyle, "E301") => (RuleGroup::Preview, rules::pycodestyle::rules::BlankLineBetweenMethods),
+        (Pycodestyle, "E302") => (RuleGroup::Preview, rules::pycodestyle::rules::BlankLinesTopLevel),
+        (Pycodestyle, "E303") => (RuleGroup::Preview, rules::pycodestyle::rules::TooManyBlankLines),
+        (Pycodestyle, "E304") => (RuleGroup::Preview, rules::pycodestyle::rules::BlankLineAfterDecorator),
+        (Pycodestyle, "E305") => (RuleGroup::Preview, rules::pycodestyle::rules::BlankLinesAfterFunctionOrClass),
+        (Pycodestyle, "E306") => (RuleGroup::Preview, rules::pycodestyle::rules::BlankLinesBeforeNestedDefinition),
         (Pycodestyle, "E401") => (RuleGroup::Stable, rules::pycodestyle::rules::MultipleImportsOnOneLine),
         (Pycodestyle, "E402") => (RuleGroup::Stable, rules::pycodestyle::rules::ModuleImportNotAtTopOfFile),
         (Pycodestyle, "E501") => (RuleGroup::Stable, rules::pycodestyle::rules::LineTooLong),

crates/ruff_linter/src/docstrings/sections.rs

@@ -5,7 +5,7 @@ use ruff_python_ast::docstrings::{leading_space, leading_words};
 use ruff_text_size::{Ranged, TextLen, TextRange, TextSize};
 use strum_macros::EnumIter;
 
-use ruff_source_file::{Line, UniversalNewlineIterator, UniversalNewlines};
+use ruff_source_file::{Line, NewlineWithTrailingNewline, UniversalNewlines};
 
 use crate::docstrings::styles::SectionStyle;
 use crate::docstrings::{Docstring, DocstringBody};
@@ -130,6 +130,34 @@ impl SectionKind {
             Self::Yields => "Yields",
         }
     }
+
+    /// Returns `true` if a section can contain subsections, as in:
+    /// ```python
+    /// Yields
+    /// ------
+    /// int
+    ///     Description of the anonymous integer return value.
+    /// ```
+    ///
+    /// For NumPy, see: <https://numpydoc.readthedocs.io/en/latest/format.html>
+    ///
+    /// For Google, see: <https://google.github.io/styleguide/pyguide.html#38-comments-and-docstrings>
+    pub(crate) fn has_subsections(self) -> bool {
+        matches!(
+            self,
+            Self::Args
+                | Self::Arguments
+                | Self::OtherArgs
+                | Self::OtherParameters
+                | Self::OtherParams
+                | Self::Parameters
+                | Self::Raises
+                | Self::Returns
+                | Self::SeeAlso
+                | Self::Warns
+                | Self::Yields
+        )
+    }
 }
 
 pub(crate) struct SectionContexts<'a> {
@@ -356,13 +384,16 @@ impl<'a> SectionContext<'a> {
     pub(crate) fn previous_line(&self) -> Option<&'a str> {
         let previous =
             &self.docstring_body.as_str()[TextRange::up_to(self.range_relative().start())];
-        previous.universal_newlines().last().map(|l| l.as_str())
+        previous
+            .universal_newlines()
+            .last()
+            .map(|line| line.as_str())
     }
 
     /// Returns the lines belonging to this section after the summary line.
-    pub(crate) fn following_lines(&self) -> UniversalNewlineIterator<'a> {
+    pub(crate) fn following_lines(&self) -> NewlineWithTrailingNewline<'a> {
         let lines = self.following_lines_str();
-        UniversalNewlineIterator::with_offset(lines, self.offset() + self.data.summary_full_end)
+        NewlineWithTrailingNewline::with_offset(lines, self.offset() + self.data.summary_full_end)
     }
 
     fn following_lines_str(&self) -> &'a str {
@@ -459,13 +490,54 @@ fn is_docstring_section(
     //         args: The arguments to the function.
     //     """
     // ```
+    // Or `parameters` in:
+    // ```python
+    // def func(parameters: tuple[int]):
+    //     """Toggle the gizmo.
+    //
+    //     Parameters:
+    //     -----
+    //     parameters:
+    //         The arguments to the function.
+    //     """
+    // ```
     // However, if the header is an _exact_ match (like `Returns:`, as opposed to `returns:`), then
     // continue to treat it as a section header.
-    if let Some(previous_section) = previous_section {
-        if previous_section.indent_size < indent_size {
+    if section_kind.has_subsections() {
+        if let Some(previous_section) = previous_section {
             let verbatim = &line[TextRange::at(indent_size, section_name_size)];
-            if section_kind.as_str() != verbatim {
-                return false;
+
+            // If the section is more deeply indented, assume it's a subsection, as in:
+            // ```python
+            // def func(args: tuple[int]):
+            //     """Toggle the gizmo.
+            //
+            //     Args:
+            //         args: The arguments to the function.
+            //     """
+            // ```
+            if previous_section.indent_size < indent_size {
+                if section_kind.as_str() != verbatim {
+                    return false;
+                }
+            }
+
+            // If the section isn't underlined, and isn't title-cased, assume it's a subsection,
+            // as in:
+            // ```python
+            // def func(parameters: tuple[int]):
+            //     """Toggle the gizmo.
+            //
+            //     Parameters:
+            //     -----
+            //     parameters:
+            //         The arguments to the function.
+            //     """
+            // ```
+            if !next_line_is_underline && verbatim.chars().next().is_some_and(char::is_lowercase) {
+                if section_kind.as_str() != verbatim {
+                    return false;
+                }
             }
         }
     }

crates/ruff_linter/src/linter.rs

@@ -109,6 +109,7 @@ pub fn check_path(
             path,
             locator,
             indexer,
+            stylist,
             settings,
             source_type,
             source_kind.as_ipy_notebook().map(Notebook::cell_offsets),

crates/ruff_linter/src/registry.rs

@@ -264,6 +264,11 @@ impl Rule {
             | Rule::BadQuotesMultilineString
             | Rule::BlanketNOQA
             | Rule::BlanketTypeIgnore
+            | Rule::BlankLineAfterDecorator
+            | Rule::BlankLineBetweenMethods
+            | Rule::BlankLinesAfterFunctionOrClass
+            | Rule::BlankLinesBeforeNestedDefinition
+            | Rule::BlankLinesTopLevel
             | Rule::CommentedOutCode
             | Rule::EmptyComment
             | Rule::ExtraneousParentheses
@@ -296,6 +301,7 @@ impl Rule {
             | Rule::ShebangNotFirstLine
             | Rule::SingleLineImplicitStringConcatenation
             | Rule::TabIndentation
+            | Rule::TooManyBlankLines
             | Rule::TrailingCommaOnBareTuple
             | Rule::TypeCommentInStub
             | Rule::UselessSemicolon

crates/ruff_linter/src/rule_selector.rs

@@ -321,6 +321,16 @@ mod schema {
                             true
                         }
                     })
+                    .filter(|_rule| {
+                        // Filter out all test-only rules
+                        #[cfg(feature = "test-rules")]
+                        #[allow(clippy::used_underscore_binding)]
+                        if _rule.starts_with("RUF9") {
+                            return false;
+                        }
+
+                        true
+                    })
                     .sorted()
                     .map(Value::String)
                     .collect(),

crates/ruff_linter/src/rules/flake8_bandit/mod.rs

@@ -46,6 +46,7 @@ mod tests {
     #[test_case(Rule::SubprocessWithoutShellEqualsTrue, Path::new("S603.py"))]
     #[test_case(Rule::SuspiciousPickleUsage, Path::new("S301.py"))]
     #[test_case(Rule::SuspiciousEvalUsage, Path::new("S307.py"))]
+    #[test_case(Rule::SuspiciousMarkSafeUsage, Path::new("S308.py"))]
     #[test_case(Rule::SuspiciousURLOpenUsage, Path::new("S310.py"))]
     #[test_case(Rule::SuspiciousTelnetUsage, Path::new("S312.py"))]
     #[test_case(Rule::SuspiciousTelnetlibImport, Path::new("S401.py"))]

crates/ruff_linter/src/rules/flake8_bandit/rules/hardcoded_bind_all_interfaces.rs

@@ -40,7 +40,9 @@ impl Violation for HardcodedBindAllInterfaces {
 pub(crate) fn hardcoded_bind_all_interfaces(checker: &mut Checker, string: StringLike) {
     let is_bind_all_interface = match string {
         StringLike::StringLiteral(ast::ExprStringLiteral { value, .. }) => value == "0.0.0.0",
-        StringLike::FStringLiteral(ast::FStringLiteralElement { value, .. }) => value == "0.0.0.0",
+        StringLike::FStringLiteral(ast::FStringLiteralElement { value, .. }) => {
+            &**value == "0.0.0.0"
+        }
         StringLike::BytesLiteral(_) => return,
     };
 

crates/ruff_linter/src/rules/flake8_bandit/rules/suspicious_function_call.rs

@@ -3,7 +3,7 @@
 //! See: <https://bandit.readthedocs.io/en/latest/blacklists/blacklist_calls.html>
 use ruff_diagnostics::{Diagnostic, DiagnosticKind, Violation};
 use ruff_macros::{derive_message_formats, violation};
-use ruff_python_ast::{self as ast, Expr, ExprCall};
+use ruff_python_ast::{self as ast, Decorator, Expr, ExprCall};
 use ruff_text_size::Ranged;
 
 use crate::checkers::ast::Checker;
@@ -848,7 +848,7 @@ pub(crate) fn suspicious_function_call(checker: &mut Checker, call: &ExprCall) {
             // Eval
             ["" | "builtins", "eval"] => Some(SuspiciousEvalUsage.into()),
             // MarkSafe
-            ["django", "utils", "safestring", "mark_safe"] => Some(SuspiciousMarkSafeUsage.into()),
+            ["django", "utils", "safestring" | "html", "mark_safe"] => Some(SuspiciousMarkSafeUsage.into()),
             // URLOpen (`urlopen`, `urlretrieve`, `Request`)
             ["urllib", "request", "urlopen" | "urlretrieve" | "Request"] |
             ["six", "moves", "urllib", "request", "urlopen" | "urlretrieve" | "Request"] => {
@@ -901,3 +901,27 @@ pub(crate) fn suspicious_function_call(checker: &mut Checker, call: &ExprCall) {
         checker.diagnostics.push(diagnostic);
     }
 }
+
+/// S308
+pub(crate) fn suspicious_function_decorator(checker: &mut Checker, decorator: &Decorator) {
+    let Some(diagnostic_kind) = checker
+        .semantic()
+        .resolve_call_path(&decorator.expression)
+        .and_then(|call_path| {
+            match call_path.as_slice() {
+                // MarkSafe
+                ["django", "utils", "safestring" | "html", "mark_safe"] => {
+                    Some(SuspiciousMarkSafeUsage.into())
+                }
+                _ => None,
+            }
+        })
+    else {
+        return;
+    };
+
+    let diagnostic = Diagnostic::new::<DiagnosticKind>(diagnostic_kind, decorator.range());
+    if checker.enabled(diagnostic.kind.rule()) {
+        checker.diagnostics.push(diagnostic);
+    }
+}

crates/ruff_linter/src/rules/flake8_bandit/snapshots/ruff_linter__rules__flake8_bandit__tests__S308_S308.py.snap

@@ -0,0 +1,34 @@
+---
+source: crates/ruff_linter/src/rules/flake8_bandit/mod.rs
+---
+S308.py:5:12: S308 Use of `mark_safe` may expose cross-site scripting vulnerabilities
+  |
+4 | def some_func():
+5 |     return mark_safe('<script>alert("evil!")</script>')
+  |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ S308
+  |
+
+S308.py:8:1: S308 Use of `mark_safe` may expose cross-site scripting vulnerabilities
+   |
+ 8 | @mark_safe
+   | ^^^^^^^^^^ S308
+ 9 | def some_func():
+10 |     return '<script>alert("evil!")</script>'
+   |
+
+S308.py:17:12: S308 Use of `mark_safe` may expose cross-site scripting vulnerabilities
+   |
+16 | def some_func():
+17 |     return mark_safe('<script>alert("evil!")</script>')
+   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ S308
+   |
+
+S308.py:20:1: S308 Use of `mark_safe` may expose cross-site scripting vulnerabilities
+   |
+20 | @mark_safe
+   | ^^^^^^^^^^ S308
+21 | def some_func():
+22 |     return '<script>alert("evil!")</script>'
+   |
+
+

crates/ruff_linter/src/rules/flake8_bugbear/rules/assert_false.rs

@@ -59,11 +59,11 @@ fn assertion_error(msg: Option<&Expr>) -> Stmt {
             })),
             arguments: Arguments {
                 args: if let Some(msg) = msg {
-                    vec![msg.clone()]
+                    Box::from([msg.clone()])
                 } else {
-                    vec![]
+                    Box::from([])
                 },
-                keywords: vec![],
+                keywords: Box::from([]),
                 range: TextRange::default(),
             },
             range: TextRange::default(),

crates/ruff_linter/src/rules/flake8_bugbear/rules/assert_raises_exception.rs

@@ -91,7 +91,7 @@ pub(crate) fn assert_raises_exception(checker: &mut Checker, items: &[WithItem])
             return;
         }
 
-        let [arg] = arguments.args.as_slice() else {
+        let [arg] = &*arguments.args else {
             return;
         };
 

crates/ruff_linter/src/rules/flake8_bugbear/rules/function_uses_loop_variable.rs

@@ -3,7 +3,7 @@ use ruff_macros::{derive_message_formats, violation};
 use ruff_python_ast::types::Node;
 use ruff_python_ast::visitor;
 use ruff_python_ast::visitor::Visitor;
-use ruff_python_ast::{self as ast, Arguments, Comprehension, Expr, ExprContext, Stmt};
+use ruff_python_ast::{self as ast, Comprehension, Expr, ExprContext, Stmt};
 use ruff_text_size::Ranged;
 
 use crate::checkers::ast::Checker;
@@ -126,18 +126,13 @@ impl<'a> Visitor<'a> for SuspiciousVariablesVisitor<'a> {
         match expr {
             Expr::Call(ast::ExprCall {
                 func,
-                arguments:
-                    Arguments {
-                        args,
-                        keywords,
-                        range: _,
-                    },
+                arguments,
                 range: _,
             }) => {
                 match func.as_ref() {
                     Expr::Name(ast::ExprName { id, .. }) => {
                         if matches!(id.as_str(), "filter" | "reduce" | "map") {
-                            for arg in args {
+                            for arg in arguments.args.iter() {
                                 if arg.is_lambda_expr() {
                                     self.safe_functions.push(arg);
                                 }
@@ -148,7 +143,7 @@ impl<'a> Visitor<'a> for SuspiciousVariablesVisitor<'a> {
                         if attr == "reduce" {
                             if let Expr::Name(ast::ExprName { id, .. }) = value.as_ref() {
                                 if id == "functools" {
-                                    for arg in args {
+                                    for arg in arguments.args.iter() {
                                         if arg.is_lambda_expr() {
                                             self.safe_functions.push(arg);
                                         }
@@ -160,7 +155,7 @@ impl<'a> Visitor<'a> for SuspiciousVariablesVisitor<'a> {
                     _ => {}
                 }
 
-                for keyword in keywords {
+                for keyword in arguments.keywords.iter() {
                     if keyword.arg.as_ref().is_some_and(|arg| arg == "key")
                         && keyword.value.is_lambda_expr()
                     {

crates/ruff_linter/src/rules/flake8_bugbear/rules/zip_without_explicit_strict.rs

@@ -114,7 +114,7 @@ fn is_infinite_iterator(arg: &Expr, semantic: &SemanticModel) -> bool {
                 }
 
                 // Ex) `iterools.repeat(1, times=None)`
-                for keyword in keywords {
+                for keyword in keywords.iter() {
                     if keyword.arg.as_ref().is_some_and(|name| name == "times") {
                         if keyword.value.is_none_literal_expr() {
                             return true;

crates/ruff_linter/src/rules/flake8_commas/rules/trailing_commas.rs

@@ -1,10 +1,8 @@
-use itertools::Itertools;
-
 use ruff_diagnostics::{AlwaysFixableViolation, Violation};
 use ruff_diagnostics::{Diagnostic, Edit, Fix};
 use ruff_macros::{derive_message_formats, violation};
 use ruff_python_index::Indexer;
-use ruff_python_parser::lexer::{LexResult, Spanned};
+use ruff_python_parser::lexer::LexResult;
 use ruff_python_parser::Tok;
 use ruff_source_file::Locator;
 use ruff_text_size::{Ranged, TextRange};
@@ -12,20 +10,20 @@ use ruff_text_size::{Ranged, TextRange};
 /// Simplified token type.
 #[derive(Copy, Clone, PartialEq, Eq)]
 enum TokenType {
-    Irrelevant,
-    NonLogicalNewline,
-    Newline,
-    Comma,
-    OpeningBracket,
-    OpeningSquareBracket,
-    OpeningCurlyBracket,
-    ClosingBracket,
-    For,
     Named,
-    Def,
-    Lambda,
-    Colon,
     String,
+    Newline,
+    NonLogicalNewline,
+    OpeningBracket,
+    ClosingBracket,
+    OpeningSquareBracket,
+    Colon,
+    Comma,
+    OpeningCurlyBracket,
+    Def,
+    For,
+    Lambda,
+    Irrelevant,
 }
 
 /// Simplified token specialized for the task.
@@ -54,30 +52,30 @@ impl Token {
     }
 }
 
-impl From<&Spanned> for Token {
-    fn from(spanned: &Spanned) -> Self {
-        let r#type = match &spanned.0 {
-            Tok::NonLogicalNewline => TokenType::NonLogicalNewline,
+impl From<(&Tok, TextRange)> for Token {
+    fn from((tok, range): (&Tok, TextRange)) -> Self {
+        let r#type = match tok {
+            Tok::Name { .. } => TokenType::Named,
+            Tok::String { .. } => TokenType::String,
             Tok::Newline => TokenType::Newline,
-            Tok::For => TokenType::For,
+            Tok::NonLogicalNewline => TokenType::NonLogicalNewline,
+            Tok::Lpar => TokenType::OpeningBracket,
+            Tok::Rpar => TokenType::ClosingBracket,
+            Tok::Lsqb => TokenType::OpeningSquareBracket,
+            Tok::Rsqb => TokenType::ClosingBracket,
+            Tok::Colon => TokenType::Colon,
+            Tok::Comma => TokenType::Comma,
+            Tok::Lbrace => TokenType::OpeningCurlyBracket,
+            Tok::Rbrace => TokenType::ClosingBracket,
             Tok::Def => TokenType::Def,
+            Tok::For => TokenType::For,
             Tok::Lambda => TokenType::Lambda,
             // Import treated like a function.
             Tok::Import => TokenType::Named,
-            Tok::Name { .. } => TokenType::Named,
-            Tok::String { .. } => TokenType::String,
-            Tok::Comma => TokenType::Comma,
-            Tok::Lpar => TokenType::OpeningBracket,
-            Tok::Lsqb => TokenType::OpeningSquareBracket,
-            Tok::Lbrace => TokenType::OpeningCurlyBracket,
-            Tok::Rpar | Tok::Rsqb | Tok::Rbrace => TokenType::ClosingBracket,
-            Tok::Colon => TokenType::Colon,
             _ => TokenType::Irrelevant,
         };
-        Self {
-            range: spanned.1,
-            r#type,
-        }
+        #[allow(clippy::inconsistent_struct_constructor)]
+        Self { range, r#type }
     }
 }
 
@@ -237,10 +235,12 @@ pub(crate) fn trailing_commas(
     indexer: &Indexer,
 ) {
     let mut fstrings = 0u32;
-    let tokens = tokens
-        .iter()
-        .flatten()
-        .filter_map(|spanned @ (tok, tok_range)| match tok {
+    let tokens = tokens.iter().filter_map(|result| {
+        let Ok((tok, tok_range)) = result else {
+            return None;
+        };
+
+        match tok {
             // Completely ignore comments -- they just interfere with the logic.
             Tok::Comment(_) => None,
             // F-strings are handled as `String` token type with the complete range
@@ -263,69 +263,30 @@ pub(crate) fn trailing_commas(
             }
             _ => {
                 if fstrings == 0 {
-                    Some(Token::from(spanned))
+                    Some(Token::from((tok, *tok_range)))
                 } else {
                     None
                 }
             }
-        });
-    let tokens = [Token::irrelevant(), Token::irrelevant()]
-        .into_iter()
-        .chain(tokens);
-    // Collapse consecutive newlines to the first one -- trailing commas are
-    // added before the first newline.
-    let tokens = tokens.coalesce(|previous, current| {
-        if previous.r#type == TokenType::NonLogicalNewline
-            && current.r#type == TokenType::NonLogicalNewline
-        {
-            Ok(previous)
-        } else {
-            Err((previous, current))
         }
     });
 
-    // The current nesting of the comma contexts.
+    let mut prev = Token::irrelevant();
+    let mut prev_prev = Token::irrelevant();
+
     let mut stack = vec![Context::new(ContextType::No)];
 
-    for (prev_prev, prev, token) in tokens.tuple_windows() {
-        // Update the comma context stack.
-        match token.r#type {
-            TokenType::OpeningBracket => match (prev.r#type, prev_prev.r#type) {
-                (TokenType::Named, TokenType::Def) => {
-                    stack.push(Context::new(ContextType::FunctionParameters));
-                }
-                (TokenType::Named | TokenType::ClosingBracket, _) => {
-                    stack.push(Context::new(ContextType::CallArguments));
-                }
-                _ => {
-                    stack.push(Context::new(ContextType::Tuple));
-                }
-            },
-            TokenType::OpeningSquareBracket => match prev.r#type {
-                TokenType::ClosingBracket | TokenType::Named | TokenType::String => {
-                    stack.push(Context::new(ContextType::Subscript));
-                }
-                _ => {
-                    stack.push(Context::new(ContextType::List));
-                }
-            },
-            TokenType::OpeningCurlyBracket => {
-                stack.push(Context::new(ContextType::Dict));
-            }
-            TokenType::Lambda => {
-                stack.push(Context::new(ContextType::LambdaParameters));
-            }
-            TokenType::For => {
-                let len = stack.len();
-                stack[len - 1] = Context::new(ContextType::No);
-            }
-            TokenType::Comma => {
-                let len = stack.len();
-                stack[len - 1].inc();
-            }
-            _ => {}
+    for token in tokens {
+        if prev.r#type == TokenType::NonLogicalNewline
+            && token.r#type == TokenType::NonLogicalNewline
+        {
+            // Collapse consecutive newlines to the first one -- trailing commas are
+            // added before the first newline.
+            continue;
         }
-        let context = &stack[stack.len() - 1];
+
+        // Update the comma context stack.
+        let context = update_context(token, prev, prev_prev, &mut stack);
 
         // Is it allowed to have a trailing comma before this token?
         let comma_allowed = token.r#type == TokenType::ClosingBracket
@@ -412,5 +373,47 @@ pub(crate) fn trailing_commas(
         if pop_context && stack.len() > 1 {
             stack.pop();
         }
+
+        prev_prev = prev;
+        prev = token;
     }
 }
+
+fn update_context(
+    token: Token,
+    prev: Token,
+    prev_prev: Token,
+    stack: &mut Vec<Context>,
+) -> Context {
+    let new_context = match token.r#type {
+        TokenType::OpeningBracket => match (prev.r#type, prev_prev.r#type) {
+            (TokenType::Named, TokenType::Def) => Context::new(ContextType::FunctionParameters),
+            (TokenType::Named | TokenType::ClosingBracket, _) => {
+                Context::new(ContextType::CallArguments)
+            }
+            _ => Context::new(ContextType::Tuple),
+        },
+        TokenType::OpeningSquareBracket => match prev.r#type {
+            TokenType::ClosingBracket | TokenType::Named | TokenType::String => {
+                Context::new(ContextType::Subscript)
+            }
+            _ => Context::new(ContextType::List),
+        },
+        TokenType::OpeningCurlyBracket => Context::new(ContextType::Dict),
+        TokenType::Lambda => Context::new(ContextType::LambdaParameters),
+        TokenType::For => {
+            let last = stack.last_mut().expect("Stack to never be empty");
+            *last = Context::new(ContextType::No);
+            return *last;
+        }
+        TokenType::Comma => {
+            let last = stack.last_mut().expect("Stack to never be empty");
+            last.inc();
+            return *last;
+        }
+        _ => return stack.last().copied().expect("Stack to never be empty"),
+    };
+
+    stack.push(new_context);
+    new_context
+}

crates/ruff_linter/src/rules/flake8_comprehensions/rules/unnecessary_collection_call.rs

@@ -36,6 +36,9 @@ use crate::rules::flake8_comprehensions::settings::Settings;
 /// ## Fix safety
 /// This rule's fix is marked as unsafe, as it may occasionally drop comments
 /// when rewriting the call. In most cases, though, comments will be preserved.
+///
+/// ## Options
+/// - `lint.flake8-comprehensions.allow-dict-calls-with-keyword-arguments`
 #[violation]
 pub struct UnnecessaryCollectionCall {
     obj_type: String,

crates/ruff_linter/src/rules/flake8_django/rules/nullable_model_string_field.rs

@@ -88,7 +88,7 @@ fn is_nullable_field<'a>(value: &'a Expr, semantic: &'a SemanticModel) -> Option
     let mut null_key = false;
     let mut blank_key = false;
     let mut unique_key = false;
-    for keyword in &call.arguments.keywords {
+    for keyword in call.arguments.keywords.iter() {
         let Some(argument) = &keyword.arg else {
             continue;
         };

crates/ruff_linter/src/rules/flake8_logging_format/rules/logging_call.rs

@@ -113,7 +113,7 @@ fn check_log_record_attr_clash(checker: &mut Checker, extra: &Keyword) {
                 .resolve_call_path(func)
                 .is_some_and(|call_path| matches!(call_path.as_slice(), ["", "dict"]))
             {
-                for keyword in keywords {
+                for keyword in keywords.iter() {
                     if let Some(attr) = &keyword.arg {
                         if is_reserved_attr(attr) {
                             checker.diagnostics.push(Diagnostic::new(

crates/ruff_linter/src/rules/flake8_pie/rules/multiple_starts_ends_with.rs

@@ -97,7 +97,7 @@ pub(crate) fn multiple_starts_ends_with(checker: &mut Checker, expr: &Expr) {
             continue;
         }
 
-        let [arg] = args.as_slice() else {
+        let [arg] = &**args else {
             continue;
         };
 
@@ -188,8 +188,8 @@ pub(crate) fn multiple_starts_ends_with(checker: &mut Checker, expr: &Expr) {
             let node3 = Expr::Call(ast::ExprCall {
                 func: Box::new(node2),
                 arguments: Arguments {
-                    args: vec![node],
-                    keywords: vec![],
+                    args: Box::from([node]),
+                    keywords: Box::from([]),
                     range: TextRange::default(),
                 },
                 range: TextRange::default(),

crates/ruff_linter/src/rules/flake8_pie/rules/unnecessary_dict_kwargs.rs

@@ -59,7 +59,7 @@ impl Violation for UnnecessaryDictKwargs {
 /// PIE804
 pub(crate) fn unnecessary_dict_kwargs(checker: &mut Checker, call: &ast::ExprCall) {
     let mut duplicate_keywords = None;
-    for keyword in &call.arguments.keywords {
+    for keyword in call.arguments.keywords.iter() {
         // keyword is a spread operator (indicated by None).
         if keyword.arg.is_some() {
             continue;
@@ -145,7 +145,7 @@ fn duplicates(call: &ast::ExprCall) -> FxHashSet<&str> {
         call.arguments.keywords.len(),
         BuildHasherDefault::default(),
     );
-    for keyword in &call.arguments.keywords {
+    for keyword in call.arguments.keywords.iter() {
         if let Some(name) = &keyword.arg {
             if !seen.insert(name.as_str()) {
                 duplicates.insert(name.as_str());

crates/ruff_linter/src/rules/flake8_pie/rules/unnecessary_range_start.rs

@@ -60,7 +60,7 @@ pub(crate) fn unnecessary_range_start(checker: &mut Checker, call: &ast::ExprCal
     }
 
     // Verify that the call has exactly two arguments (no `step`).
-    let [start, _] = call.arguments.args.as_slice() else {
+    let [start, _] = &*call.arguments.args else {
         return;
     };
 

crates/ruff_linter/src/rules/flake8_pyi/rules/bad_version_info_comparison.rs

@@ -69,7 +69,7 @@ pub(crate) fn bad_version_info_comparison(checker: &mut Checker, test: &Expr) {
         return;
     };
 
-    let ([op], [_right]) = (ops.as_slice(), comparators.as_slice()) else {
+    let ([op], [_right]) = (&**ops, &**comparators) else {
         return;
     };
 

crates/ruff_linter/src/rules/flake8_pyi/rules/unrecognized_platform.rs

@@ -101,7 +101,7 @@ pub(crate) fn unrecognized_platform(checker: &mut Checker, test: &Expr) {
         return;
     };
 
-    let ([op], [right]) = (ops.as_slice(), comparators.as_slice()) else {
+    let ([op], [right]) = (&**ops, &**comparators) else {
         return;
     };
 

crates/ruff_linter/src/rules/flake8_pyi/rules/unrecognized_version_info.rs

@@ -129,7 +129,7 @@ pub(crate) fn unrecognized_version_info(checker: &mut Checker, test: &Expr) {
         return;
     };
 
-    let ([op], [comparator]) = (ops.as_slice(), comparators.as_slice()) else {
+    let ([op], [comparator]) = (&**ops, &**comparators) else {
         return;
     };
 

crates/ruff_linter/src/rules/flake8_pytest_style/rules/assertion.rs

@@ -411,7 +411,7 @@ fn to_pytest_raises_args<'a>(
 ) -> Option<Cow<'a, str>> {
     let args = match attr {
         "assertRaises" | "failUnlessRaises" => {
-            match (arguments.args.as_slice(), arguments.keywords.as_slice()) {
+            match (&*arguments.args, &*arguments.keywords) {
                 // Ex) `assertRaises(Exception)`
                 ([arg], []) => Cow::Borrowed(checker.locator().slice(arg)),
                 // Ex) `assertRaises(expected_exception=Exception)`
@@ -427,7 +427,7 @@ fn to_pytest_raises_args<'a>(
             }
         }
         "assertRaisesRegex" | "assertRaisesRegexp" => {
-            match (arguments.args.as_slice(), arguments.keywords.as_slice()) {
+            match (&*arguments.args, &*arguments.keywords) {
                 // Ex) `assertRaisesRegex(Exception, regex)`
                 ([arg1, arg2], []) => Cow::Owned(format!(
                     "{}, match={}",

crates/ruff_linter/src/rules/flake8_pytest_style/rules/parametrize.rs

@@ -257,15 +257,18 @@ fn elts_to_csv(elts: &[Expr], generator: Generator) -> Option<String> {
     }
 
     let node = Expr::from(ast::StringLiteral {
-        value: elts.iter().fold(String::new(), |mut acc, elt| {
-            if let Expr::StringLiteral(ast::ExprStringLiteral { value, .. }) = elt {
-                if !acc.is_empty() {
-                    acc.push(',');
+        value: elts
+            .iter()
+            .fold(String::new(), |mut acc, elt| {
+                if let Expr::StringLiteral(ast::ExprStringLiteral { value, .. }) = elt {
+                    if !acc.is_empty() {
+                        acc.push(',');
+                    }
+                    acc.push_str(value.to_str());
                 }
-                acc.push_str(value.to_str());
-            }
-            acc
-        }),
+                acc
+            })
+            .into_boxed_str(),
         ..ast::StringLiteral::default()
     });
     Some(generator.expr(&node))
@@ -327,7 +330,7 @@ fn check_names(checker: &mut Checker, decorator: &Decorator, expr: &Expr) {
                                 .iter()
                                 .map(|name| {
                                     Expr::from(ast::StringLiteral {
-                                        value: (*name).to_string(),
+                                        value: (*name).to_string().into_boxed_str(),
                                         ..ast::StringLiteral::default()
                                     })
                                 })
@@ -360,7 +363,7 @@ fn check_names(checker: &mut Checker, decorator: &Decorator, expr: &Expr) {
                                 .iter()
                                 .map(|name| {
                                     Expr::from(ast::StringLiteral {
-                                        value: (*name).to_string(),
+                                        value: (*name).to_string().into_boxed_str(),
                                         ..ast::StringLiteral::default()
                                     })
                                 })
@@ -635,17 +638,17 @@ pub(crate) fn parametrize(checker: &mut Checker, decorators: &[Decorator]) {
             }) = &decorator.expression
             {
                 if checker.enabled(Rule::PytestParametrizeNamesWrongType) {
-                    if let [names, ..] = args.as_slice() {
+                    if let [names, ..] = &**args {
                         check_names(checker, decorator, names);
                     }
                 }
                 if checker.enabled(Rule::PytestParametrizeValuesWrongType) {
-                    if let [names, values, ..] = args.as_slice() {
+                    if let [names, values, ..] = &**args {
                         check_values(checker, names, values);
                     }
                 }
                 if checker.enabled(Rule::PytestDuplicateParametrizeTestCases) {
-                    if let [_, values, ..] = args.as_slice() {
+                    if let [_, values, ..] = &**args {
                         check_duplicates(checker, values);
                     }
                 }

crates/ruff_linter/src/rules/flake8_pytest_style/rules/unittest_assert.rs

@@ -173,8 +173,8 @@ fn assert(expr: &Expr, msg: Option<&Expr>) -> Stmt {
 fn compare(left: &Expr, cmp_op: CmpOp, right: &Expr) -> Expr {
     Expr::Compare(ast::ExprCompare {
         left: Box::new(left.clone()),
-        ops: vec![cmp_op],
-        comparators: vec![right.clone()],
+        ops: Box::from([cmp_op]),
+        comparators: Box::from([right.clone()]),
         range: TextRange::default(),
     })
 }
@@ -390,8 +390,8 @@ impl UnittestAssert {
                 let node1 = ast::ExprCall {
                     func: Box::new(node.into()),
                     arguments: Arguments {
-                        args: vec![(**obj).clone(), (**cls).clone()],
-                        keywords: vec![],
+                        args: Box::from([(**obj).clone(), (**cls).clone()]),
+                        keywords: Box::from([]),
                         range: TextRange::default(),
                     },
                     range: TextRange::default(),
@@ -434,8 +434,8 @@ impl UnittestAssert {
                 let node2 = ast::ExprCall {
                     func: Box::new(node1.into()),
                     arguments: Arguments {
-                        args: vec![(**regex).clone(), (**text).clone()],
-                        keywords: vec![],
+                        args: Box::from([(**regex).clone(), (**text).clone()]),
+                        keywords: Box::from([]),
                         range: TextRange::default(),
                     },
                     range: TextRange::default(),

crates/ruff_linter/src/rules/flake8_quotes/rules/avoidable_escaped_quote.rs

@@ -221,6 +221,7 @@ pub(crate) fn avoidable_escaped_quote(
             Tok::FStringMiddle {
                 value: string_contents,
                 is_raw,
+                triple_quoted: _,
             } if !is_raw => {
                 let Some(context) = fstrings.last_mut() else {
                     continue;
@@ -361,6 +362,7 @@ pub(crate) fn unnecessary_escaped_quote(
             Tok::FStringMiddle {
                 value: string_contents,
                 is_raw,
+                triple_quoted: _,
             } if !is_raw => {
                 let Some(context) = fstrings.last_mut() else {
                     continue;

crates/ruff_linter/src/rules/flake8_simplify/rules/ast_bool_op.rs

@@ -437,8 +437,8 @@ pub(crate) fn duplicate_isinstance_call(checker: &mut Checker, expr: &Expr) {
                 let node2 = ast::ExprCall {
                     func: Box::new(node1.into()),
                     arguments: Arguments {
-                        args: vec![target.clone(), node.into()],
-                        keywords: vec![],
+                        args: Box::from([target.clone(), node.into()]),
+                        keywords: Box::from([]),
                         range: TextRange::default(),
                     },
                     range: TextRange::default(),
@@ -480,13 +480,13 @@ fn match_eq_target(expr: &Expr) -> Option<(&str, &Expr)> {
     else {
         return None;
     };
-    if ops != &[CmpOp::Eq] {
+    if **ops != [CmpOp::Eq] {
         return None;
     }
     let Expr::Name(ast::ExprName { id, .. }) = left.as_ref() else {
         return None;
     };
-    let [comparator] = comparators.as_slice() else {
+    let [comparator] = &**comparators else {
         return None;
     };
     if !comparator.is_name_expr() {
@@ -551,8 +551,8 @@ pub(crate) fn compare_with_tuple(checker: &mut Checker, expr: &Expr) {
         };
         let node2 = ast::ExprCompare {
             left: Box::new(node1.into()),
-            ops: vec![CmpOp::In],
-            comparators: vec![node.into()],
+            ops: Box::from([CmpOp::In]),
+            comparators: Box::from([node.into()]),
             range: TextRange::default(),
         };
         let in_expr = node2.into();

crates/ruff_linter/src/rules/flake8_simplify/rules/ast_expr.rs

@@ -217,7 +217,7 @@ fn check_os_environ_subscript(checker: &mut Checker, expr: &Expr) {
         slice.range(),
     );
     let node = ast::StringLiteral {
-        value: capital_env_var,
+        value: capital_env_var.into_boxed_str(),
         unicode: env_var.is_unicode(),
         ..ast::StringLiteral::default()
     };

crates/ruff_linter/src/rules/flake8_simplify/rules/ast_ifexp.rs

@@ -185,8 +185,8 @@ pub(crate) fn if_expr_with_true_false(
                         .into(),
                     ),
                     arguments: Arguments {
-                        args: vec![test.clone()],
-                        keywords: vec![],
+                        args: Box::from([test.clone()]),
+                        keywords: Box::from([]),
                         range: TextRange::default(),
                     },
                     range: TextRange::default(),

crates/ruff_linter/src/rules/flake8_simplify/rules/ast_unary_op.rs

@@ -176,7 +176,7 @@ pub(crate) fn negation_with_equal_op(
     );
     let node = ast::ExprCompare {
         left: left.clone(),
-        ops: vec![CmpOp::NotEq],
+        ops: Box::from([CmpOp::NotEq]),
         comparators: comparators.clone(),
         range: TextRange::default(),
     };
@@ -206,7 +206,7 @@ pub(crate) fn negation_with_not_equal_op(
     else {
         return;
     };
-    if !matches!(&ops[..], [CmpOp::NotEq]) {
+    if !matches!(&**ops, [CmpOp::NotEq]) {
         return;
     }
     if is_exception_check(checker.semantic().current_statement()) {
@@ -231,7 +231,7 @@ pub(crate) fn negation_with_not_equal_op(
     );
     let node = ast::ExprCompare {
         left: left.clone(),
-        ops: vec![CmpOp::Eq],
+        ops: Box::from([CmpOp::Eq]),
         comparators: comparators.clone(),
         range: TextRange::default(),
     };
@@ -279,8 +279,8 @@ pub(crate) fn double_negation(checker: &mut Checker, expr: &Expr, op: UnaryOp, o
         let node1 = ast::ExprCall {
             func: Box::new(node.into()),
             arguments: Arguments {
-                args: vec![*operand.clone()],
-                keywords: vec![],
+                args: Box::from([*operand.clone()]),
+                keywords: Box::from([]),
                 range: TextRange::default(),
             },
             range: TextRange::default(),

crates/ruff_linter/src/rules/flake8_simplify/rules/collapsible_if.rs

@@ -253,8 +253,7 @@ fn is_main_check(expr: &Expr) -> bool {
     {
         if let Expr::Name(ast::ExprName { id, .. }) = left.as_ref() {
             if id == "__name__" {
-                if let [Expr::StringLiteral(ast::ExprStringLiteral { value, .. })] =
-                    comparators.as_slice()
+                if let [Expr::StringLiteral(ast::ExprStringLiteral { value, .. })] = &**comparators
                 {
                     if value == "__main__" {
                         return true;

crates/ruff_linter/src/rules/flake8_simplify/rules/if_else_block_instead_of_dict_get.rs

@@ -122,7 +122,7 @@ pub(crate) fn if_else_block_instead_of_dict_get(checker: &mut Checker, stmt_if:
     else {
         return;
     };
-    let [test_dict] = test_dict.as_slice() else {
+    let [test_dict] = &**test_dict else {
         return;
     };
     let (expected_var, expected_value, default_var, default_value) = match ops[..] {
@@ -176,8 +176,8 @@ pub(crate) fn if_else_block_instead_of_dict_get(checker: &mut Checker, stmt_if:
     let node3 = ast::ExprCall {
         func: Box::new(node2.into()),
         arguments: Arguments {
-            args: vec![node1, node],
-            keywords: vec![],
+            args: Box::from([node1, node]),
+            keywords: Box::from([]),
             range: TextRange::default(),
         },
         range: TextRange::default(),
@@ -233,11 +233,11 @@ pub(crate) fn if_exp_instead_of_dict_get(
     else {
         return;
     };
-    let [test_dict] = test_dict.as_slice() else {
+    let [test_dict] = &**test_dict else {
         return;
     };
 
-    let (body, default_value) = match ops.as_slice() {
+    let (body, default_value) = match &**ops {
         [CmpOp::In] => (body, orelse),
         [CmpOp::NotIn] => (orelse, body),
         _ => {
@@ -276,8 +276,8 @@ pub(crate) fn if_exp_instead_of_dict_get(
     let fixed_node = ast::ExprCall {
         func: Box::new(dict_get_node.into()),
         arguments: Arguments {
-            args: vec![dict_key_node, default_value_node],
-            keywords: vec![],
+            args: Box::from([dict_key_node, default_value_node]),
+            keywords: Box::from([]),
             range: TextRange::default(),
         },
         range: TextRange::default(),

crates/ruff_linter/src/rules/flake8_simplify/rules/if_else_block_instead_of_dict_lookup.rs

@@ -64,10 +64,10 @@ pub(crate) fn if_else_block_instead_of_dict_lookup(checker: &mut Checker, stmt_i
     let Expr::Name(ast::ExprName { id: target, .. }) = left.as_ref() else {
         return;
     };
-    if ops != &[CmpOp::Eq] {
+    if **ops != [CmpOp::Eq] {
         return;
     }
-    let [expr] = comparators.as_slice() else {
+    let [expr] = &**comparators else {
         return;
     };
     let Some(literal_expr) = expr.as_literal_expr() else {
@@ -127,10 +127,10 @@ pub(crate) fn if_else_block_instead_of_dict_lookup(checker: &mut Checker, stmt_i
                 let Expr::Name(ast::ExprName { id, .. }) = left.as_ref() else {
                     return;
                 };
-                if id != target || ops != &[CmpOp::Eq] {
+                if id != target || **ops != [CmpOp::Eq] {
                     return;
                 }
-                let [expr] = comparators.as_slice() else {
+                let [expr] = &**comparators else {
                     return;
                 };
                 let Some(literal_expr) = expr.as_literal_expr() else {

crates/ruff_linter/src/rules/flake8_simplify/rules/key_in_dict.rs

@@ -194,7 +194,7 @@ pub(crate) fn key_in_dict_comprehension(checker: &mut Checker, comprehension: &C
 
 /// SIM118 in a comparison.
 pub(crate) fn key_in_dict_compare(checker: &mut Checker, compare: &ast::ExprCompare) {
-    let [op] = compare.ops.as_slice() else {
+    let [op] = &*compare.ops else {
         return;
     };
 
@@ -202,7 +202,7 @@ pub(crate) fn key_in_dict_compare(checker: &mut Checker, compare: &ast::ExprComp
         return;
     }
 
-    let [right] = compare.comparators.as_slice() else {
+    let [right] = &*compare.comparators else {
         return;
     };
 

crates/ruff_linter/src/rules/flake8_simplify/rules/needless_bool.rs

@@ -161,8 +161,8 @@ pub(crate) fn needless_bool(checker: &mut Checker, stmt_if: &ast::StmtIf) {
             let value_node = ast::ExprCall {
                 func: Box::new(func_node.into()),
                 arguments: Arguments {
-                    args: vec![if_test.clone()],
-                    keywords: vec![],
+                    args: Box::from([if_test.clone()]),
+                    keywords: Box::from([]),
                     range: TextRange::default(),
                 },
                 range: TextRange::default(),

crates/ruff_linter/src/rules/flake8_simplify/rules/reimplemented_builtin.rs

@@ -140,7 +140,7 @@ pub(crate) fn convert_for_loop_to_any_all(checker: &mut Checker, stmt: &Stmt) {
                     range: _,
                 }) = &loop_.test
                 {
-                    if let ([op], [comparator]) = (ops.as_slice(), comparators.as_slice()) {
+                    if let ([op], [comparator]) = (&**ops, &**comparators) {
                         let op = match op {
                             CmpOp::Eq => CmpOp::NotEq,
                             CmpOp::NotEq => CmpOp::Eq,
@@ -155,8 +155,8 @@ pub(crate) fn convert_for_loop_to_any_all(checker: &mut Checker, stmt: &Stmt) {
                         };
                         let node = ast::ExprCompare {
                             left: left.clone(),
-                            ops: vec![op],
-                            comparators: vec![comparator.clone()],
+                            ops: Box::from([op]),
+                            comparators: Box::from([comparator.clone()]),
                             range: TextRange::default(),
                         };
                         node.into()
@@ -391,8 +391,8 @@ fn return_stmt(id: &str, test: &Expr, target: &Expr, iter: &Expr, generator: Gen
     let node2 = ast::ExprCall {
         func: Box::new(node1.into()),
         arguments: Arguments {
-            args: vec![node.into()],
-            keywords: vec![],
+            args: Box::from([node.into()]),
+            keywords: Box::from([]),
             range: TextRange::default(),
         },
         range: TextRange::default(),

crates/ruff_linter/src/rules/flake8_trio/snapshots/ruff_linter__rules__flake8_trio__tests__TRIO100_TRIO100.py.snap

@@ -3,24 +3,20 @@ source: crates/ruff_linter/src/rules/flake8_trio/mod.rs
 ---
 TRIO100.py:5:5: TRIO100 A `with trio.fail_after(...):` context does not contain any `await` statements. This makes it pointless, as the timeout can only be triggered by a checkpoint.
   |
-4 |   async def foo():
+4 |   async def func():
 5 |       with trio.fail_after():
   |  _____^
 6 | |         ...
   | |___________^ TRIO100
-7 |   
-8 |   async def foo():
   |
 
-TRIO100.py:13:5: TRIO100 A `with trio.move_on_after(...):` context does not contain any `await` statements. This makes it pointless, as the timeout can only be triggered by a checkpoint.
+TRIO100.py:15:5: TRIO100 A `with trio.move_on_after(...):` context does not contain any `await` statements. This makes it pointless, as the timeout can only be triggered by a checkpoint.
    |
-12 |   async def foo():
-13 |       with trio.move_on_after():
+14 |   async def func():
+15 |       with trio.move_on_after():
    |  _____^
-14 | |         ...
+16 | |         ...
    | |___________^ TRIO100
-15 |   
-16 |   async def foo():
    |
 
 

crates/ruff_linter/src/rules/flake8_use_pathlib/rules/path_constructor_current_directory.rs

@@ -1,7 +1,6 @@
-use ruff_python_ast::{self as ast, Arguments, Expr, ExprCall};
-
 use ruff_diagnostics::{AlwaysFixableViolation, Diagnostic, Edit, Fix};
 use ruff_macros::{derive_message_formats, violation};
+use ruff_python_ast::{self as ast, Expr, ExprCall};
 
 use crate::checkers::ast::Checker;
 
@@ -53,19 +52,15 @@ pub(crate) fn path_constructor_current_directory(checker: &mut Checker, expr: &E
         return;
     }
 
-    let Expr::Call(ExprCall {
-        arguments: Arguments { args, keywords, .. },
-        ..
-    }) = expr
-    else {
+    let Expr::Call(ExprCall { arguments, .. }) = expr else {
         return;
     };
 
-    if !keywords.is_empty() {
+    if !arguments.keywords.is_empty() {
         return;
     }
 
-    let [Expr::StringLiteral(ast::ExprStringLiteral { value, range })] = args.as_slice() else {
+    let [Expr::StringLiteral(ast::ExprStringLiteral { value, range })] = &*arguments.args else {
         return;
     };
 

crates/ruff_linter/src/rules/flake8_use_pathlib/violations.rs

@@ -610,7 +610,7 @@ impl Violation for OsPathIsfile {
 /// ## Why is this bad?
 /// `pathlib` offers a high-level API for path manipulation, as compared to
 /// the lower-level API offered by `os`. When possible, using `Path` object
-/// methods such as `Path.is_link()` can improve readability over the `os`
+/// methods such as `Path.is_symlink()` can improve readability over the `os`
 /// module's counterparts (e.g., `os.path.islink()`).
 ///
 /// Note that `os` functions may be preferable if performance is a concern,
@@ -627,11 +627,11 @@ impl Violation for OsPathIsfile {
 /// ```python
 /// from pathlib import Path
 ///
-/// Path("docs").is_link()
+/// Path("docs").is_symlink()
 /// ```
 ///
 /// ## References
-/// - [Python documentation: `Path.is_link`](https://docs.python.org/3/library/pathlib.html#pathlib.Path.is_link)
+/// - [Python documentation: `Path.is_symlink`](https://docs.python.org/3/library/pathlib.html#pathlib.Path.is_symlink)
 /// - [Python documentation: `os.path.islink`](https://docs.python.org/3/library/os.path.html#os.path.islink)
 /// - [PEP 428](https://peps.python.org/pep-0428/)
 /// - [Correspondence between `os` and `pathlib`](https://docs.python.org/3/library/pathlib.html#correspondence-to-tools-in-the-os-module)

crates/ruff_linter/src/rules/flynt/helpers.rs

@@ -15,7 +15,7 @@ fn to_f_string_expression_element(inner: &Expr) -> ast::FStringElement {
 /// Convert a string to a [`ast::FStringElement::Literal`].
 pub(super) fn to_f_string_literal_element(s: &str) -> ast::FStringElement {
     ast::FStringElement::Literal(ast::FStringLiteralElement {
-        value: s.to_owned(),
+        value: s.to_string().into_boxed_str(),
         range: TextRange::default(),
     })
 }
@@ -53,7 +53,7 @@ pub(super) fn to_f_string_element(expr: &Expr) -> Option<ast::FStringElement> {
     match expr {
         Expr::StringLiteral(ast::ExprStringLiteral { value, range }) => {
             Some(ast::FStringElement::Literal(ast::FStringLiteralElement {
-                value: value.to_string(),
+                value: value.to_string().into_boxed_str(),
                 range: *range,
             }))
         }

crates/ruff_linter/src/rules/flynt/rules/static_join_to_fstring.rs

@@ -72,7 +72,8 @@ fn build_fstring(joiner: &str, joinees: &[Expr]) -> Option<Expr> {
                         None
                     }
                 })
-                .join(joiner),
+                .join(joiner)
+                .into_boxed_str(),
             ..ast::StringLiteral::default()
         };
         return Some(node.into());
@@ -115,7 +116,7 @@ pub(crate) fn static_join_to_fstring(checker: &mut Checker, expr: &Expr, joiner:
     if !keywords.is_empty() {
         return;
     }
-    let [arg] = args.as_slice() else {
+    let [arg] = &**args else {
         return;
     };
 

crates/ruff_linter/src/rules/numpy/rules/legacy_random.rs

@@ -80,8 +80,11 @@ pub(crate) fn legacy_random(checker: &mut Checker, expr: &Expr) {
                     "set_state" |
                     // Simple random data
                     "rand" |
+                    "ranf" |
+                    "sample" |
                     "randn" |
                     "randint" |
+                    "random" |
                     "random_integers" |
                     "random_sample" |
                     "choice" |

crates/ruff_linter/src/rules/numpy/snapshots/ruff_linter__rules__numpy__tests__numpy-legacy-random_NPY002.py.snap

@@ -45,7 +45,7 @@ NPY002.py:20:1: NPY002 Replace legacy `np.random.set_state` call with `np.random
 20 | numpy.random.set_state()
    | ^^^^^^^^^^^^^^^^^^^^^^ NPY002
 21 | numpy.random.rand()
-22 | numpy.random.randn()
+22 | numpy.random.ranf()
    |
 
 NPY002.py:21:1: NPY002 Replace legacy `np.random.rand` call with `np.random.Generator`
@@ -54,444 +54,464 @@ NPY002.py:21:1: NPY002 Replace legacy `np.random.rand` call with `np.random.Gene
 20 | numpy.random.set_state()
 21 | numpy.random.rand()
    | ^^^^^^^^^^^^^^^^^ NPY002
-22 | numpy.random.randn()
-23 | numpy.random.randint()
+22 | numpy.random.ranf()
+23 | numpy.random.sample()
    |
 
-NPY002.py:22:1: NPY002 Replace legacy `np.random.randn` call with `np.random.Generator`
+NPY002.py:22:1: NPY002 Replace legacy `np.random.ranf` call with `np.random.Generator`
    |
 20 | numpy.random.set_state()
 21 | numpy.random.rand()
-22 | numpy.random.randn()
-   | ^^^^^^^^^^^^^^^^^^ NPY002
-23 | numpy.random.randint()
-24 | numpy.random.random_integers()
+22 | numpy.random.ranf()
+   | ^^^^^^^^^^^^^^^^^ NPY002
+23 | numpy.random.sample()
+24 | numpy.random.randn()
    |
 
-NPY002.py:23:1: NPY002 Replace legacy `np.random.randint` call with `np.random.Generator`
+NPY002.py:23:1: NPY002 Replace legacy `np.random.sample` call with `np.random.Generator`
    |
 21 | numpy.random.rand()
-22 | numpy.random.randn()
-23 | numpy.random.randint()
+22 | numpy.random.ranf()
+23 | numpy.random.sample()
+   | ^^^^^^^^^^^^^^^^^^^ NPY002
+24 | numpy.random.randn()
+25 | numpy.random.randint()
+   |
+
+NPY002.py:24:1: NPY002 Replace legacy `np.random.randn` call with `np.random.Generator`
+   |
+22 | numpy.random.ranf()
+23 | numpy.random.sample()
+24 | numpy.random.randn()
+   | ^^^^^^^^^^^^^^^^^^ NPY002
+25 | numpy.random.randint()
+26 | numpy.random.random()
+   |
+
+NPY002.py:25:1: NPY002 Replace legacy `np.random.randint` call with `np.random.Generator`
+   |
+23 | numpy.random.sample()
+24 | numpy.random.randn()
+25 | numpy.random.randint()
    | ^^^^^^^^^^^^^^^^^^^^ NPY002
-24 | numpy.random.random_integers()
-25 | numpy.random.random_sample()
+26 | numpy.random.random()
+27 | numpy.random.random_integers()
    |
 
-NPY002.py:24:1: NPY002 Replace legacy `np.random.random_integers` call with `np.random.Generator`
+NPY002.py:26:1: NPY002 Replace legacy `np.random.random` call with `np.random.Generator`
    |
-22 | numpy.random.randn()
-23 | numpy.random.randint()
-24 | numpy.random.random_integers()
+24 | numpy.random.randn()
+25 | numpy.random.randint()
+26 | numpy.random.random()
+   | ^^^^^^^^^^^^^^^^^^^ NPY002
+27 | numpy.random.random_integers()
+28 | numpy.random.random_sample()
+   |
+
+NPY002.py:27:1: NPY002 Replace legacy `np.random.random_integers` call with `np.random.Generator`
+   |
+25 | numpy.random.randint()
+26 | numpy.random.random()
+27 | numpy.random.random_integers()
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ NPY002
-25 | numpy.random.random_sample()
-26 | numpy.random.choice()
+28 | numpy.random.random_sample()
+29 | numpy.random.choice()
    |
 
-NPY002.py:25:1: NPY002 Replace legacy `np.random.random_sample` call with `np.random.Generator`
+NPY002.py:28:1: NPY002 Replace legacy `np.random.random_sample` call with `np.random.Generator`
    |
-23 | numpy.random.randint()
-24 | numpy.random.random_integers()
-25 | numpy.random.random_sample()
+26 | numpy.random.random()
+27 | numpy.random.random_integers()
+28 | numpy.random.random_sample()
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^ NPY002
-26 | numpy.random.choice()
-27 | numpy.random.bytes()
+29 | numpy.random.choice()
+30 | numpy.random.bytes()
    |
 
-NPY002.py:26:1: NPY002 Replace legacy `np.random.choice` call with `np.random.Generator`
+NPY002.py:29:1: NPY002 Replace legacy `np.random.choice` call with `np.random.Generator`
    |
-24 | numpy.random.random_integers()
-25 | numpy.random.random_sample()
-26 | numpy.random.choice()
+27 | numpy.random.random_integers()
+28 | numpy.random.random_sample()
+29 | numpy.random.choice()
    | ^^^^^^^^^^^^^^^^^^^ NPY002
-27 | numpy.random.bytes()
-28 | numpy.random.shuffle()
+30 | numpy.random.bytes()
+31 | numpy.random.shuffle()
    |
 
-NPY002.py:27:1: NPY002 Replace legacy `np.random.bytes` call with `np.random.Generator`
+NPY002.py:30:1: NPY002 Replace legacy `np.random.bytes` call with `np.random.Generator`
    |
-25 | numpy.random.random_sample()
-26 | numpy.random.choice()
-27 | numpy.random.bytes()
+28 | numpy.random.random_sample()
+29 | numpy.random.choice()
+30 | numpy.random.bytes()
    | ^^^^^^^^^^^^^^^^^^ NPY002
-28 | numpy.random.shuffle()
-29 | numpy.random.permutation()
+31 | numpy.random.shuffle()
+32 | numpy.random.permutation()
    |
 
-NPY002.py:28:1: NPY002 Replace legacy `np.random.shuffle` call with `np.random.Generator`
+NPY002.py:31:1: NPY002 Replace legacy `np.random.shuffle` call with `np.random.Generator`
    |
-26 | numpy.random.choice()
-27 | numpy.random.bytes()
-28 | numpy.random.shuffle()
+29 | numpy.random.choice()
+30 | numpy.random.bytes()
+31 | numpy.random.shuffle()
    | ^^^^^^^^^^^^^^^^^^^^ NPY002
-29 | numpy.random.permutation()
-30 | numpy.random.beta()
+32 | numpy.random.permutation()
+33 | numpy.random.beta()
    |
 
-NPY002.py:29:1: NPY002 Replace legacy `np.random.permutation` call with `np.random.Generator`
+NPY002.py:32:1: NPY002 Replace legacy `np.random.permutation` call with `np.random.Generator`
    |
-27 | numpy.random.bytes()
-28 | numpy.random.shuffle()
-29 | numpy.random.permutation()
+30 | numpy.random.bytes()
+31 | numpy.random.shuffle()
+32 | numpy.random.permutation()
    | ^^^^^^^^^^^^^^^^^^^^^^^^ NPY002
-30 | numpy.random.beta()
-31 | numpy.random.binomial()
+33 | numpy.random.beta()
+34 | numpy.random.binomial()
    |
 
-NPY002.py:30:1: NPY002 Replace legacy `np.random.beta` call with `np.random.Generator`
+NPY002.py:33:1: NPY002 Replace legacy `np.random.beta` call with `np.random.Generator`
    |
-28 | numpy.random.shuffle()
-29 | numpy.random.permutation()
-30 | numpy.random.beta()
+31 | numpy.random.shuffle()
+32 | numpy.random.permutation()
+33 | numpy.random.beta()
    | ^^^^^^^^^^^^^^^^^ NPY002
-31 | numpy.random.binomial()
-32 | numpy.random.chisquare()
+34 | numpy.random.binomial()
+35 | numpy.random.chisquare()
    |
 
-NPY002.py:31:1: NPY002 Replace legacy `np.random.binomial` call with `np.random.Generator`
+NPY002.py:34:1: NPY002 Replace legacy `np.random.binomial` call with `np.random.Generator`
    |
-29 | numpy.random.permutation()
-30 | numpy.random.beta()
-31 | numpy.random.binomial()
+32 | numpy.random.permutation()
+33 | numpy.random.beta()
+34 | numpy.random.binomial()
    | ^^^^^^^^^^^^^^^^^^^^^ NPY002
-32 | numpy.random.chisquare()
-33 | numpy.random.dirichlet()
+35 | numpy.random.chisquare()
+36 | numpy.random.dirichlet()
    |
 
-NPY002.py:32:1: NPY002 Replace legacy `np.random.chisquare` call with `np.random.Generator`
+NPY002.py:35:1: NPY002 Replace legacy `np.random.chisquare` call with `np.random.Generator`
    |
-30 | numpy.random.beta()
-31 | numpy.random.binomial()
-32 | numpy.random.chisquare()
+33 | numpy.random.beta()
+34 | numpy.random.binomial()
+35 | numpy.random.chisquare()
    | ^^^^^^^^^^^^^^^^^^^^^^ NPY002
-33 | numpy.random.dirichlet()
-34 | numpy.random.exponential()
+36 | numpy.random.dirichlet()
+37 | numpy.random.exponential()
    |
 
-NPY002.py:33:1: NPY002 Replace legacy `np.random.dirichlet` call with `np.random.Generator`
+NPY002.py:36:1: NPY002 Replace legacy `np.random.dirichlet` call with `np.random.Generator`
    |
-31 | numpy.random.binomial()
-32 | numpy.random.chisquare()
-33 | numpy.random.dirichlet()
+34 | numpy.random.binomial()
+35 | numpy.random.chisquare()
+36 | numpy.random.dirichlet()
    | ^^^^^^^^^^^^^^^^^^^^^^ NPY002
-34 | numpy.random.exponential()
-35 | numpy.random.f()
+37 | numpy.random.exponential()
+38 | numpy.random.f()
    |
 
-NPY002.py:34:1: NPY002 Replace legacy `np.random.exponential` call with `np.random.Generator`
+NPY002.py:37:1: NPY002 Replace legacy `np.random.exponential` call with `np.random.Generator`
    |
-32 | numpy.random.chisquare()
-33 | numpy.random.dirichlet()
-34 | numpy.random.exponential()
+35 | numpy.random.chisquare()
+36 | numpy.random.dirichlet()
+37 | numpy.random.exponential()
    | ^^^^^^^^^^^^^^^^^^^^^^^^ NPY002
-35 | numpy.random.f()
-36 | numpy.random.gamma()
+38 | numpy.random.f()
+39 | numpy.random.gamma()
    |
 
-NPY002.py:35:1: NPY002 Replace legacy `np.random.f` call with `np.random.Generator`
+NPY002.py:38:1: NPY002 Replace legacy `np.random.f` call with `np.random.Generator`
    |
-33 | numpy.random.dirichlet()
-34 | numpy.random.exponential()
-35 | numpy.random.f()
+36 | numpy.random.dirichlet()
+37 | numpy.random.exponential()
+38 | numpy.random.f()
    | ^^^^^^^^^^^^^^ NPY002
-36 | numpy.random.gamma()
-37 | numpy.random.geometric()
+39 | numpy.random.gamma()
+40 | numpy.random.geometric()
    |
 
-NPY002.py:36:1: NPY002 Replace legacy `np.random.gamma` call with `np.random.Generator`
+NPY002.py:39:1: NPY002 Replace legacy `np.random.gamma` call with `np.random.Generator`
    |
-34 | numpy.random.exponential()
-35 | numpy.random.f()
-36 | numpy.random.gamma()
+37 | numpy.random.exponential()
+38 | numpy.random.f()
+39 | numpy.random.gamma()
    | ^^^^^^^^^^^^^^^^^^ NPY002
-37 | numpy.random.geometric()
-38 | numpy.random.get_state()
+40 | numpy.random.geometric()
+41 | numpy.random.gumbel()
    |
 
-NPY002.py:37:1: NPY002 Replace legacy `np.random.geometric` call with `np.random.Generator`
+NPY002.py:40:1: NPY002 Replace legacy `np.random.geometric` call with `np.random.Generator`
    |
-35 | numpy.random.f()
-36 | numpy.random.gamma()
-37 | numpy.random.geometric()
+38 | numpy.random.f()
+39 | numpy.random.gamma()
+40 | numpy.random.geometric()
    | ^^^^^^^^^^^^^^^^^^^^^^ NPY002
-38 | numpy.random.get_state()
-39 | numpy.random.gumbel()
+41 | numpy.random.gumbel()
+42 | numpy.random.hypergeometric()
    |
 
-NPY002.py:38:1: NPY002 Replace legacy `np.random.get_state` call with `np.random.Generator`
+NPY002.py:41:1: NPY002 Replace legacy `np.random.gumbel` call with `np.random.Generator`
    |
-36 | numpy.random.gamma()
-37 | numpy.random.geometric()
-38 | numpy.random.get_state()
-   | ^^^^^^^^^^^^^^^^^^^^^^ NPY002
-39 | numpy.random.gumbel()
-40 | numpy.random.hypergeometric()
-   |
-
-NPY002.py:39:1: NPY002 Replace legacy `np.random.gumbel` call with `np.random.Generator`
-   |
-37 | numpy.random.geometric()
-38 | numpy.random.get_state()
-39 | numpy.random.gumbel()
+39 | numpy.random.gamma()
+40 | numpy.random.geometric()
+41 | numpy.random.gumbel()
    | ^^^^^^^^^^^^^^^^^^^ NPY002
-40 | numpy.random.hypergeometric()
-41 | numpy.random.laplace()
+42 | numpy.random.hypergeometric()
+43 | numpy.random.laplace()
    |
 
-NPY002.py:40:1: NPY002 Replace legacy `np.random.hypergeometric` call with `np.random.Generator`
+NPY002.py:42:1: NPY002 Replace legacy `np.random.hypergeometric` call with `np.random.Generator`
    |
-38 | numpy.random.get_state()
-39 | numpy.random.gumbel()
-40 | numpy.random.hypergeometric()
+40 | numpy.random.geometric()
+41 | numpy.random.gumbel()
+42 | numpy.random.hypergeometric()
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ NPY002
-41 | numpy.random.laplace()
-42 | numpy.random.logistic()
+43 | numpy.random.laplace()
+44 | numpy.random.logistic()
    |
 
-NPY002.py:41:1: NPY002 Replace legacy `np.random.laplace` call with `np.random.Generator`
+NPY002.py:43:1: NPY002 Replace legacy `np.random.laplace` call with `np.random.Generator`
    |
-39 | numpy.random.gumbel()
-40 | numpy.random.hypergeometric()
-41 | numpy.random.laplace()
+41 | numpy.random.gumbel()
+42 | numpy.random.hypergeometric()
+43 | numpy.random.laplace()
    | ^^^^^^^^^^^^^^^^^^^^ NPY002
-42 | numpy.random.logistic()
-43 | numpy.random.lognormal()
+44 | numpy.random.logistic()
+45 | numpy.random.lognormal()
    |
 
-NPY002.py:42:1: NPY002 Replace legacy `np.random.logistic` call with `np.random.Generator`
+NPY002.py:44:1: NPY002 Replace legacy `np.random.logistic` call with `np.random.Generator`
    |
-40 | numpy.random.hypergeometric()
-41 | numpy.random.laplace()
-42 | numpy.random.logistic()
+42 | numpy.random.hypergeometric()
+43 | numpy.random.laplace()
+44 | numpy.random.logistic()
    | ^^^^^^^^^^^^^^^^^^^^^ NPY002
-43 | numpy.random.lognormal()
-44 | numpy.random.logseries()
+45 | numpy.random.lognormal()
+46 | numpy.random.logseries()
    |
 
-NPY002.py:43:1: NPY002 Replace legacy `np.random.lognormal` call with `np.random.Generator`
+NPY002.py:45:1: NPY002 Replace legacy `np.random.lognormal` call with `np.random.Generator`
    |
-41 | numpy.random.laplace()
-42 | numpy.random.logistic()
-43 | numpy.random.lognormal()
+43 | numpy.random.laplace()
+44 | numpy.random.logistic()
+45 | numpy.random.lognormal()
    | ^^^^^^^^^^^^^^^^^^^^^^ NPY002
-44 | numpy.random.logseries()
-45 | numpy.random.multinomial()
+46 | numpy.random.logseries()
+47 | numpy.random.multinomial()
    |
 
-NPY002.py:44:1: NPY002 Replace legacy `np.random.logseries` call with `np.random.Generator`
+NPY002.py:46:1: NPY002 Replace legacy `np.random.logseries` call with `np.random.Generator`
    |
-42 | numpy.random.logistic()
-43 | numpy.random.lognormal()
-44 | numpy.random.logseries()
+44 | numpy.random.logistic()
+45 | numpy.random.lognormal()
+46 | numpy.random.logseries()
    | ^^^^^^^^^^^^^^^^^^^^^^ NPY002
-45 | numpy.random.multinomial()
-46 | numpy.random.multivariate_normal()
+47 | numpy.random.multinomial()
+48 | numpy.random.multivariate_normal()
    |
 
-NPY002.py:45:1: NPY002 Replace legacy `np.random.multinomial` call with `np.random.Generator`
+NPY002.py:47:1: NPY002 Replace legacy `np.random.multinomial` call with `np.random.Generator`
    |
-43 | numpy.random.lognormal()
-44 | numpy.random.logseries()
-45 | numpy.random.multinomial()
+45 | numpy.random.lognormal()
+46 | numpy.random.logseries()
+47 | numpy.random.multinomial()
    | ^^^^^^^^^^^^^^^^^^^^^^^^ NPY002
-46 | numpy.random.multivariate_normal()
-47 | numpy.random.negative_binomial()
+48 | numpy.random.multivariate_normal()
+49 | numpy.random.negative_binomial()
    |
 
-NPY002.py:46:1: NPY002 Replace legacy `np.random.multivariate_normal` call with `np.random.Generator`
+NPY002.py:48:1: NPY002 Replace legacy `np.random.multivariate_normal` call with `np.random.Generator`
    |
-44 | numpy.random.logseries()
-45 | numpy.random.multinomial()
-46 | numpy.random.multivariate_normal()
+46 | numpy.random.logseries()
+47 | numpy.random.multinomial()
+48 | numpy.random.multivariate_normal()
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ NPY002
-47 | numpy.random.negative_binomial()
-48 | numpy.random.noncentral_chisquare()
+49 | numpy.random.negative_binomial()
+50 | numpy.random.noncentral_chisquare()
    |
 
-NPY002.py:47:1: NPY002 Replace legacy `np.random.negative_binomial` call with `np.random.Generator`
+NPY002.py:49:1: NPY002 Replace legacy `np.random.negative_binomial` call with `np.random.Generator`
    |
-45 | numpy.random.multinomial()
-46 | numpy.random.multivariate_normal()
-47 | numpy.random.negative_binomial()
+47 | numpy.random.multinomial()
+48 | numpy.random.multivariate_normal()
+49 | numpy.random.negative_binomial()
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ NPY002
-48 | numpy.random.noncentral_chisquare()
-49 | numpy.random.noncentral_f()
+50 | numpy.random.noncentral_chisquare()
+51 | numpy.random.noncentral_f()
    |
 
-NPY002.py:48:1: NPY002 Replace legacy `np.random.noncentral_chisquare` call with `np.random.Generator`
+NPY002.py:50:1: NPY002 Replace legacy `np.random.noncentral_chisquare` call with `np.random.Generator`
    |
-46 | numpy.random.multivariate_normal()
-47 | numpy.random.negative_binomial()
-48 | numpy.random.noncentral_chisquare()
+48 | numpy.random.multivariate_normal()
+49 | numpy.random.negative_binomial()
+50 | numpy.random.noncentral_chisquare()
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ NPY002
-49 | numpy.random.noncentral_f()
-50 | numpy.random.normal()
+51 | numpy.random.noncentral_f()
+52 | numpy.random.normal()
    |
 
-NPY002.py:49:1: NPY002 Replace legacy `np.random.noncentral_f` call with `np.random.Generator`
+NPY002.py:51:1: NPY002 Replace legacy `np.random.noncentral_f` call with `np.random.Generator`
    |
-47 | numpy.random.negative_binomial()
-48 | numpy.random.noncentral_chisquare()
-49 | numpy.random.noncentral_f()
+49 | numpy.random.negative_binomial()
+50 | numpy.random.noncentral_chisquare()
+51 | numpy.random.noncentral_f()
    | ^^^^^^^^^^^^^^^^^^^^^^^^^ NPY002
-50 | numpy.random.normal()
-51 | numpy.random.pareto()
+52 | numpy.random.normal()
+53 | numpy.random.pareto()
    |
 
-NPY002.py:50:1: NPY002 Replace legacy `np.random.normal` call with `np.random.Generator`
+NPY002.py:52:1: NPY002 Replace legacy `np.random.normal` call with `np.random.Generator`
    |
-48 | numpy.random.noncentral_chisquare()
-49 | numpy.random.noncentral_f()
-50 | numpy.random.normal()
+50 | numpy.random.noncentral_chisquare()
+51 | numpy.random.noncentral_f()
+52 | numpy.random.normal()
    | ^^^^^^^^^^^^^^^^^^^ NPY002
-51 | numpy.random.pareto()
-52 | numpy.random.poisson()
+53 | numpy.random.pareto()
+54 | numpy.random.poisson()
    |
 
-NPY002.py:51:1: NPY002 Replace legacy `np.random.pareto` call with `np.random.Generator`
+NPY002.py:53:1: NPY002 Replace legacy `np.random.pareto` call with `np.random.Generator`
    |
-49 | numpy.random.noncentral_f()
-50 | numpy.random.normal()
-51 | numpy.random.pareto()
+51 | numpy.random.noncentral_f()
+52 | numpy.random.normal()
+53 | numpy.random.pareto()
    | ^^^^^^^^^^^^^^^^^^^ NPY002
-52 | numpy.random.poisson()
-53 | numpy.random.power()
+54 | numpy.random.poisson()
+55 | numpy.random.power()
    |
 
-NPY002.py:52:1: NPY002 Replace legacy `np.random.poisson` call with `np.random.Generator`
+NPY002.py:54:1: NPY002 Replace legacy `np.random.poisson` call with `np.random.Generator`
    |
-50 | numpy.random.normal()
-51 | numpy.random.pareto()
-52 | numpy.random.poisson()
+52 | numpy.random.normal()
+53 | numpy.random.pareto()
+54 | numpy.random.poisson()
    | ^^^^^^^^^^^^^^^^^^^^ NPY002
-53 | numpy.random.power()
-54 | numpy.random.rayleigh()
+55 | numpy.random.power()
+56 | numpy.random.rayleigh()
    |
 
-NPY002.py:53:1: NPY002 Replace legacy `np.random.power` call with `np.random.Generator`
+NPY002.py:55:1: NPY002 Replace legacy `np.random.power` call with `np.random.Generator`
    |
-51 | numpy.random.pareto()
-52 | numpy.random.poisson()
-53 | numpy.random.power()
+53 | numpy.random.pareto()
+54 | numpy.random.poisson()
+55 | numpy.random.power()
    | ^^^^^^^^^^^^^^^^^^ NPY002
-54 | numpy.random.rayleigh()
-55 | numpy.random.standard_cauchy()
+56 | numpy.random.rayleigh()
+57 | numpy.random.standard_cauchy()
    |
 
-NPY002.py:54:1: NPY002 Replace legacy `np.random.rayleigh` call with `np.random.Generator`
+NPY002.py:56:1: NPY002 Replace legacy `np.random.rayleigh` call with `np.random.Generator`
    |
-52 | numpy.random.poisson()
-53 | numpy.random.power()
-54 | numpy.random.rayleigh()
+54 | numpy.random.poisson()
+55 | numpy.random.power()
+56 | numpy.random.rayleigh()
    | ^^^^^^^^^^^^^^^^^^^^^ NPY002
-55 | numpy.random.standard_cauchy()
-56 | numpy.random.standard_exponential()
+57 | numpy.random.standard_cauchy()
+58 | numpy.random.standard_exponential()
    |
 
-NPY002.py:55:1: NPY002 Replace legacy `np.random.standard_cauchy` call with `np.random.Generator`
+NPY002.py:57:1: NPY002 Replace legacy `np.random.standard_cauchy` call with `np.random.Generator`
    |
-53 | numpy.random.power()
-54 | numpy.random.rayleigh()
-55 | numpy.random.standard_cauchy()
+55 | numpy.random.power()
+56 | numpy.random.rayleigh()
+57 | numpy.random.standard_cauchy()
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ NPY002
-56 | numpy.random.standard_exponential()
-57 | numpy.random.standard_gamma()
+58 | numpy.random.standard_exponential()
+59 | numpy.random.standard_gamma()
    |
 
-NPY002.py:56:1: NPY002 Replace legacy `np.random.standard_exponential` call with `np.random.Generator`
+NPY002.py:58:1: NPY002 Replace legacy `np.random.standard_exponential` call with `np.random.Generator`
    |
-54 | numpy.random.rayleigh()
-55 | numpy.random.standard_cauchy()
-56 | numpy.random.standard_exponential()
+56 | numpy.random.rayleigh()
+57 | numpy.random.standard_cauchy()
+58 | numpy.random.standard_exponential()
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ NPY002
-57 | numpy.random.standard_gamma()
-58 | numpy.random.standard_normal()
+59 | numpy.random.standard_gamma()
+60 | numpy.random.standard_normal()
    |
 
-NPY002.py:57:1: NPY002 Replace legacy `np.random.standard_gamma` call with `np.random.Generator`
+NPY002.py:59:1: NPY002 Replace legacy `np.random.standard_gamma` call with `np.random.Generator`
    |
-55 | numpy.random.standard_cauchy()
-56 | numpy.random.standard_exponential()
-57 | numpy.random.standard_gamma()
+57 | numpy.random.standard_cauchy()
+58 | numpy.random.standard_exponential()
+59 | numpy.random.standard_gamma()
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ NPY002
-58 | numpy.random.standard_normal()
-59 | numpy.random.standard_t()
+60 | numpy.random.standard_normal()
+61 | numpy.random.standard_t()
    |
 
-NPY002.py:58:1: NPY002 Replace legacy `np.random.standard_normal` call with `np.random.Generator`
+NPY002.py:60:1: NPY002 Replace legacy `np.random.standard_normal` call with `np.random.Generator`
    |
-56 | numpy.random.standard_exponential()
-57 | numpy.random.standard_gamma()
-58 | numpy.random.standard_normal()
+58 | numpy.random.standard_exponential()
+59 | numpy.random.standard_gamma()
+60 | numpy.random.standard_normal()
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ NPY002
-59 | numpy.random.standard_t()
-60 | numpy.random.triangular()
+61 | numpy.random.standard_t()
+62 | numpy.random.triangular()
    |
 
-NPY002.py:59:1: NPY002 Replace legacy `np.random.standard_t` call with `np.random.Generator`
+NPY002.py:61:1: NPY002 Replace legacy `np.random.standard_t` call with `np.random.Generator`
    |
-57 | numpy.random.standard_gamma()
-58 | numpy.random.standard_normal()
-59 | numpy.random.standard_t()
+59 | numpy.random.standard_gamma()
+60 | numpy.random.standard_normal()
+61 | numpy.random.standard_t()
    | ^^^^^^^^^^^^^^^^^^^^^^^ NPY002
-60 | numpy.random.triangular()
-61 | numpy.random.uniform()
+62 | numpy.random.triangular()
+63 | numpy.random.uniform()
    |
 
-NPY002.py:60:1: NPY002 Replace legacy `np.random.triangular` call with `np.random.Generator`
+NPY002.py:62:1: NPY002 Replace legacy `np.random.triangular` call with `np.random.Generator`
    |
-58 | numpy.random.standard_normal()
-59 | numpy.random.standard_t()
-60 | numpy.random.triangular()
+60 | numpy.random.standard_normal()
+61 | numpy.random.standard_t()
+62 | numpy.random.triangular()
    | ^^^^^^^^^^^^^^^^^^^^^^^ NPY002
-61 | numpy.random.uniform()
-62 | numpy.random.vonmises()
+63 | numpy.random.uniform()
+64 | numpy.random.vonmises()
    |
 
-NPY002.py:61:1: NPY002 Replace legacy `np.random.uniform` call with `np.random.Generator`
+NPY002.py:63:1: NPY002 Replace legacy `np.random.uniform` call with `np.random.Generator`
    |
-59 | numpy.random.standard_t()
-60 | numpy.random.triangular()
-61 | numpy.random.uniform()
+61 | numpy.random.standard_t()
+62 | numpy.random.triangular()
+63 | numpy.random.uniform()
    | ^^^^^^^^^^^^^^^^^^^^ NPY002
-62 | numpy.random.vonmises()
-63 | numpy.random.wald()
+64 | numpy.random.vonmises()
+65 | numpy.random.wald()
    |
 
-NPY002.py:62:1: NPY002 Replace legacy `np.random.vonmises` call with `np.random.Generator`
+NPY002.py:64:1: NPY002 Replace legacy `np.random.vonmises` call with `np.random.Generator`
    |
-60 | numpy.random.triangular()
-61 | numpy.random.uniform()
-62 | numpy.random.vonmises()
+62 | numpy.random.triangular()
+63 | numpy.random.uniform()
+64 | numpy.random.vonmises()
    | ^^^^^^^^^^^^^^^^^^^^^ NPY002
-63 | numpy.random.wald()
-64 | numpy.random.weibull()
+65 | numpy.random.wald()
+66 | numpy.random.weibull()
    |
 
-NPY002.py:63:1: NPY002 Replace legacy `np.random.wald` call with `np.random.Generator`
+NPY002.py:65:1: NPY002 Replace legacy `np.random.wald` call with `np.random.Generator`
    |
-61 | numpy.random.uniform()
-62 | numpy.random.vonmises()
-63 | numpy.random.wald()
+63 | numpy.random.uniform()
+64 | numpy.random.vonmises()
+65 | numpy.random.wald()
    | ^^^^^^^^^^^^^^^^^ NPY002
-64 | numpy.random.weibull()
-65 | numpy.random.zipf()
+66 | numpy.random.weibull()
+67 | numpy.random.zipf()
    |
 
-NPY002.py:64:1: NPY002 Replace legacy `np.random.weibull` call with `np.random.Generator`
+NPY002.py:66:1: NPY002 Replace legacy `np.random.weibull` call with `np.random.Generator`
    |
-62 | numpy.random.vonmises()
-63 | numpy.random.wald()
-64 | numpy.random.weibull()
+64 | numpy.random.vonmises()
+65 | numpy.random.wald()
+66 | numpy.random.weibull()
    | ^^^^^^^^^^^^^^^^^^^^ NPY002
-65 | numpy.random.zipf()
+67 | numpy.random.zipf()
    |
 
-NPY002.py:65:1: NPY002 Replace legacy `np.random.zipf` call with `np.random.Generator`
+NPY002.py:67:1: NPY002 Replace legacy `np.random.zipf` call with `np.random.Generator`
    |
-63 | numpy.random.wald()
-64 | numpy.random.weibull()
-65 | numpy.random.zipf()
+65 | numpy.random.wald()
+66 | numpy.random.weibull()
+67 | numpy.random.zipf()
    | ^^^^^^^^^^^^^^^^^ NPY002
    |
 

crates/ruff_linter/src/rules/perflint/rules/manual_list_comprehension.rs

@@ -109,7 +109,7 @@ pub(crate) fn manual_list_comprehension(checker: &mut Checker, target: &Expr, bo
         return;
     }
 
-    let [arg] = args.as_slice() else {
+    let [arg] = &**args else {
         return;
     };
 

crates/ruff_linter/src/rules/perflint/rules/manual_list_copy.rs

@@ -76,7 +76,7 @@ pub(crate) fn manual_list_copy(checker: &mut Checker, target: &Expr, body: &[Stm
         return;
     }
 
-    let [arg] = args.as_slice() else {
+    let [arg] = &**args else {
         return;
     };
 

crates/ruff_linter/src/rules/perflint/rules/unnecessary_list_cast.rs

@@ -64,7 +64,7 @@ pub(crate) fn unnecessary_list_cast(checker: &mut Checker, iter: &Expr, body: &[
         return;
     };
 
-    let [arg] = args.as_slice() else {
+    let [arg] = &**args else {
         return;
     };
 

crates/ruff_linter/src/rules/pycodestyle/mod.rs

@@ -136,6 +136,13 @@ mod tests {
         Path::new("E25.py")
     )]
     #[test_case(Rule::MissingWhitespaceAroundParameterEquals, Path::new("E25.py"))]
+    #[test_case(Rule::BlankLineBetweenMethods, Path::new("E30.py"))]
+    #[test_case(Rule::BlankLinesTopLevel, Path::new("E30.py"))]
+    #[test_case(Rule::TooManyBlankLines, Path::new("E30.py"))]
+    #[test_case(Rule::BlankLineAfterDecorator, Path::new("E30.py"))]
+    #[test_case(Rule::BlankLinesAfterFunctionOrClass, Path::new("E30.py"))]
+    #[test_case(Rule::BlankLinesBeforeNestedDefinition, Path::new("E30.py"))]
+
     fn logical(rule_code: Rule, path: &Path) -> Result<()> {
         let snapshot = format!("{}_{}", rule_code.noqa_code(), path.to_string_lossy());
         let diagnostics = test_path(

crates/ruff_linter/src/rules/pycodestyle/rules/blank_lines.rs

@@ -0,0 +1,895 @@
+use itertools::Itertools;
+use std::cmp::Ordering;
+use std::num::NonZeroU32;
+use std::slice::Iter;
+
+use ruff_diagnostics::AlwaysFixableViolation;
+use ruff_diagnostics::Diagnostic;
+use ruff_diagnostics::Edit;
+use ruff_diagnostics::Fix;
+use ruff_macros::{derive_message_formats, violation};
+use ruff_python_codegen::Stylist;
+use ruff_python_parser::lexer::LexResult;
+use ruff_python_parser::lexer::LexicalError;
+use ruff_python_parser::Tok;
+use ruff_python_parser::TokenKind;
+use ruff_source_file::{Locator, UniversalNewlines};
+use ruff_text_size::TextRange;
+use ruff_text_size::TextSize;
+
+use crate::checkers::logical_lines::expand_indent;
+use crate::line_width::IndentWidth;
+use ruff_python_trivia::PythonWhitespace;
+
+/// Number of blank lines around top level classes and functions.
+const BLANK_LINES_TOP_LEVEL: u32 = 2;
+/// Number of blank lines around methods and nested classes and functions.
+const BLANK_LINES_METHOD_LEVEL: u32 = 1;
+
+/// ## What it does
+/// Checks for missing blank lines between methods of a class.
+///
+/// ## Why is this bad?
+/// PEP 8 recommends exactly one blank line between methods of a class.
+///
+/// ## Example
+/// ```python
+/// class MyClass(object):
+///     def func1():
+///         pass
+///     def func2():
+///         pass
+/// ```
+///
+/// Use instead:
+/// ```python
+/// class MyClass(object):
+///     def func1():
+///         pass
+///
+///     def func2():
+///         pass
+/// ```
+///
+/// ## References
+/// - [PEP 8](https://peps.python.org/pep-0008/#blank-lines)
+/// - [Flake 8 rule](https://www.flake8rules.com/rules/E301.html)
+#[violation]
+pub struct BlankLineBetweenMethods;
+
+impl AlwaysFixableViolation for BlankLineBetweenMethods {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("Expected {BLANK_LINES_METHOD_LEVEL:?} blank line, found 0")
+    }
+
+    fn fix_title(&self) -> String {
+        "Add missing blank line".to_string()
+    }
+}
+
+/// ## What it does
+/// Checks for missing blank lines between top level functions and classes.
+///
+/// ## Why is this bad?
+/// PEP 8 recommends exactly two blank lines between top level functions and classes.
+///
+/// ## Example
+/// ```python
+/// def func1():
+///     pass
+/// def func2():
+///     pass
+/// ```
+///
+/// Use instead:
+/// ```python
+/// def func1():
+///     pass
+///
+///
+/// def func2():
+///     pass
+/// ```
+///
+/// ## References
+/// - [PEP 8](https://peps.python.org/pep-0008/#blank-lines)
+/// - [Flake 8 rule](https://www.flake8rules.com/rules/E302.html)
+#[violation]
+pub struct BlankLinesTopLevel {
+    actual_blank_lines: u32,
+}
+
+impl AlwaysFixableViolation for BlankLinesTopLevel {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        let BlankLinesTopLevel {
+            actual_blank_lines: nb_blank_lines,
+        } = self;
+
+        format!("Expected {BLANK_LINES_TOP_LEVEL:?} blank lines, found {nb_blank_lines}")
+    }
+
+    fn fix_title(&self) -> String {
+        "Add missing blank line(s)".to_string()
+    }
+}
+
+/// ## What it does
+/// Checks for extraneous blank lines.
+///
+/// ## Why is this bad?
+/// PEP 8 recommends using blank lines as follows:
+/// - No more than two blank lines between top-level statements.
+/// - No more than one blank line between non-top-level statements.
+///
+/// ## Example
+/// ```python
+/// def func1():
+///     pass
+///
+///
+///
+/// def func2():
+///     pass
+/// ```
+///
+/// Use instead:
+/// ```python
+/// def func1():
+///     pass
+///
+///
+/// def func2():
+///     pass
+/// ```
+///
+/// ## References
+/// - [PEP 8](https://peps.python.org/pep-0008/#blank-lines)
+/// - [Flake 8 rule](https://www.flake8rules.com/rules/E303.html)
+#[violation]
+pub struct TooManyBlankLines {
+    actual_blank_lines: u32,
+}
+
+impl AlwaysFixableViolation for TooManyBlankLines {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        let TooManyBlankLines {
+            actual_blank_lines: nb_blank_lines,
+        } = self;
+        format!("Too many blank lines ({nb_blank_lines})")
+    }
+
+    fn fix_title(&self) -> String {
+        "Remove extraneous blank line(s)".to_string()
+    }
+}
+
+/// ## What it does
+/// Checks for extraneous blank line(s) after function decorators.
+///
+/// ## Why is this bad?
+/// There should be no blank lines between a decorator and the object it is decorating.
+///
+/// ## Example
+/// ```python
+/// class User(object):
+///
+///     @property
+///
+///     def name(self):
+///         pass
+/// ```
+///
+/// Use instead:
+/// ```python
+/// class User(object):
+///
+///     @property
+///     def name(self):
+///         pass
+/// ```
+///
+/// ## References
+/// - [PEP 8](https://peps.python.org/pep-0008/#blank-lines)
+/// - [Flake 8 rule](https://www.flake8rules.com/rules/E304.html)
+#[violation]
+pub struct BlankLineAfterDecorator {
+    actual_blank_lines: u32,
+}
+
+impl AlwaysFixableViolation for BlankLineAfterDecorator {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!(
+            "Blank lines found after function decorator ({lines})",
+            lines = self.actual_blank_lines
+        )
+    }
+
+    fn fix_title(&self) -> String {
+        "Remove extraneous blank line(s)".to_string()
+    }
+}
+
+/// ## What it does
+/// Checks for missing blank lines after the end of function or class.
+///
+/// ## Why is this bad?
+/// PEP 8 recommends using blank lines as following:
+/// - Two blank lines are expected between functions and classes
+/// - One blank line is expected between methods of a class.
+///
+/// ## Example
+/// ```python
+/// class User(object):
+///     pass
+/// user = User()
+/// ```
+///
+/// Use instead:
+/// ```python
+/// class User(object):
+///     pass
+///
+///
+/// user = User()
+/// ```
+///
+/// ## References
+/// - [PEP 8](https://peps.python.org/pep-0008/#blank-lines)
+/// - [Flake 8 rule](https://www.flake8rules.com/rules/E305.html)
+#[violation]
+pub struct BlankLinesAfterFunctionOrClass {
+    actual_blank_lines: u32,
+}
+
+impl AlwaysFixableViolation for BlankLinesAfterFunctionOrClass {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        let BlankLinesAfterFunctionOrClass {
+            actual_blank_lines: blank_lines,
+        } = self;
+        format!("Expected 2 blank lines after class or function definition, found ({blank_lines})")
+    }
+
+    fn fix_title(&self) -> String {
+        "Add missing blank line(s)".to_string()
+    }
+}
+
+/// ## What it does
+/// Checks for 1 blank line between nested function or class definitions.
+///
+/// ## Why is this bad?
+/// PEP 8 recommends using blank lines as following:
+/// - Two blank lines are expected between functions and classes
+/// - One blank line is expected between methods of a class.
+///
+/// ## Example
+/// ```python
+/// def outer():
+///     def inner():
+///         pass
+///     def inner2():
+///         pass
+/// ```
+///
+/// Use instead:
+/// ```python
+/// def outer():
+///     def inner():
+///         pass
+///
+///     def inner2():
+///         pass
+/// ```
+///
+/// ## References
+/// - [PEP 8](https://peps.python.org/pep-0008/#blank-lines)
+/// - [Flake 8 rule](https://www.flake8rules.com/rules/E306.html)
+#[violation]
+pub struct BlankLinesBeforeNestedDefinition;
+
+impl AlwaysFixableViolation for BlankLinesBeforeNestedDefinition {
+    #[derive_message_formats]
+    fn message(&self) -> String {
+        format!("Expected 1 blank line before a nested definition, found 0")
+    }
+
+    fn fix_title(&self) -> String {
+        "Add missing blank line".to_string()
+    }
+}
+
+#[derive(Debug)]
+struct LogicalLineInfo {
+    kind: LogicalLineKind,
+    first_token_range: TextRange,
+
+    // The token's kind right before the newline ending the logical line.
+    last_token: TokenKind,
+
+    // The end of the logical line including the newline.
+    logical_line_end: TextSize,
+
+    // `true` if this is not a blank but only consists of a comment.
+    is_comment_only: bool,
+
+    /// `true` if the line is a string only (including trivia tokens) line, which is a docstring if coming right after a class/function definition.
+    is_docstring: bool,
+
+    /// The indentation length in columns. See [`expand_indent`] for the computation of the indent.
+    indent_length: usize,
+
+    /// The number of blank lines preceding the current line.
+    blank_lines: BlankLines,
+
+    /// The maximum number of consecutive blank lines between the current line
+    /// and the previous non-comment logical line.
+    /// One of its main uses is to allow a comments to directly precede or follow a class/function definition.
+    /// As such, `preceding_blank_lines` is used for rules that cannot trigger on comments (all rules except E303),
+    /// and `blank_lines` is used for the rule that can trigger on comments (E303).
+    preceding_blank_lines: BlankLines,
+}
+
+/// Iterator that processes tokens until a full logical line (or comment line) is "built".
+/// It then returns characteristics of that logical line (see `LogicalLineInfo`).
+struct LinePreprocessor<'a> {
+    tokens: Iter<'a, Result<(Tok, TextRange), LexicalError>>,
+    locator: &'a Locator<'a>,
+    indent_width: IndentWidth,
+    /// The start position of the next logical line.
+    line_start: TextSize,
+    /// Maximum number of consecutive blank lines between the current line and the previous non-comment logical line.
+    /// One of its main uses is to allow a comment to directly precede a class/function definition.
+    max_preceding_blank_lines: BlankLines,
+}
+
+impl<'a> LinePreprocessor<'a> {
+    fn new(
+        tokens: &'a [LexResult],
+        locator: &'a Locator,
+        indent_width: IndentWidth,
+    ) -> LinePreprocessor<'a> {
+        LinePreprocessor {
+            tokens: tokens.iter(),
+            locator,
+            line_start: TextSize::new(0),
+            max_preceding_blank_lines: BlankLines::Zero,
+            indent_width,
+        }
+    }
+}
+
+impl<'a> Iterator for LinePreprocessor<'a> {
+    type Item = LogicalLineInfo;
+
+    fn next(&mut self) -> Option<LogicalLineInfo> {
+        let mut line_is_comment_only = true;
+        let mut is_docstring = false;
+        // Number of consecutive blank lines directly preceding this logical line.
+        let mut blank_lines = BlankLines::Zero;
+        let mut first_logical_line_token: Option<(LogicalLineKind, TextRange)> = None;
+        let mut last_token: TokenKind = TokenKind::EndOfFile;
+        let mut parens = 0u32;
+
+        while let Some(result) = self.tokens.next() {
+            let Ok((token, range)) = result else {
+                continue;
+            };
+
+            if matches!(token, Tok::Indent | Tok::Dedent) {
+                continue;
+            }
+
+            let token_kind = TokenKind::from_token(token);
+
+            let (logical_line_kind, first_token_range) = if let Some(first_token_range) =
+                first_logical_line_token
+            {
+                first_token_range
+            }
+            // At the start of the line...
+            else {
+                // An empty line
+                if token_kind == TokenKind::NonLogicalNewline {
+                    blank_lines.add(*range);
+
+                    self.line_start = range.end();
+
+                    continue;
+                }
+
+                is_docstring = token_kind == TokenKind::String;
+
+                let logical_line_kind = match token_kind {
+                    TokenKind::Class => LogicalLineKind::Class,
+                    TokenKind::Comment => LogicalLineKind::Comment,
+                    TokenKind::At => LogicalLineKind::Decorator,
+                    TokenKind::Def => LogicalLineKind::Function,
+                    // Lookahead to distinguish `async def` from `async with`.
+                    TokenKind::Async
+                        if matches!(self.tokens.as_slice().first(), Some(Ok((Tok::Def, _)))) =>
+                    {
+                        LogicalLineKind::Function
+                    }
+                    _ => LogicalLineKind::Other,
+                };
+
+                first_logical_line_token = Some((logical_line_kind, *range));
+
+                (logical_line_kind, *range)
+            };
+
+            if !token_kind.is_trivia() {
+                line_is_comment_only = false;
+            }
+
+            // A docstring line is composed only of the docstring (TokenKind::String) and trivia tokens.
+            // (If a comment follows a docstring, we still count the line as a docstring)
+            if token_kind != TokenKind::String && !token_kind.is_trivia() {
+                is_docstring = false;
+            }
+
+            match token_kind {
+                TokenKind::Lbrace | TokenKind::Lpar | TokenKind::Lsqb => {
+                    parens = parens.saturating_add(1);
+                }
+                TokenKind::Rbrace | TokenKind::Rpar | TokenKind::Rsqb => {
+                    parens = parens.saturating_sub(1);
+                }
+                TokenKind::Newline | TokenKind::NonLogicalNewline if parens == 0 => {
+                    let indent_range = TextRange::new(self.line_start, first_token_range.start());
+
+                    let indent_length =
+                        expand_indent(self.locator.slice(indent_range), self.indent_width);
+
+                    self.max_preceding_blank_lines =
+                        self.max_preceding_blank_lines.max(blank_lines);
+
+                    let logical_line = LogicalLineInfo {
+                        kind: logical_line_kind,
+                        first_token_range,
+                        last_token,
+                        logical_line_end: range.end(),
+                        is_comment_only: line_is_comment_only,
+                        is_docstring,
+                        indent_length,
+                        blank_lines,
+                        preceding_blank_lines: self.max_preceding_blank_lines,
+                    };
+
+                    // Reset the blank lines after a non-comment only line.
+                    if !line_is_comment_only {
+                        self.max_preceding_blank_lines = BlankLines::Zero;
+                    }
+
+                    // Set the start for the next logical line.
+                    self.line_start = range.end();
+
+                    return Some(logical_line);
+                }
+                _ => {}
+            }
+
+            last_token = token_kind;
+        }
+
+        None
+    }
+}
+
+#[derive(Clone, Copy, Debug, Default)]
+enum BlankLines {
+    /// No blank lines
+    #[default]
+    Zero,
+
+    /// One or more blank lines
+    Many { count: NonZeroU32, range: TextRange },
+}
+
+impl BlankLines {
+    fn add(&mut self, line_range: TextRange) {
+        match self {
+            BlankLines::Zero => {
+                *self = BlankLines::Many {
+                    count: NonZeroU32::MIN,
+                    range: line_range,
+                }
+            }
+            BlankLines::Many { count, range } => {
+                *count = count.saturating_add(1);
+                *range = TextRange::new(range.start(), line_range.end());
+            }
+        }
+    }
+
+    fn count(&self) -> u32 {
+        match self {
+            BlankLines::Zero => 0,
+            BlankLines::Many { count, .. } => count.get(),
+        }
+    }
+
+    fn range(&self) -> Option<TextRange> {
+        match self {
+            BlankLines::Zero => None,
+            BlankLines::Many { range, .. } => Some(*range),
+        }
+    }
+}
+
+impl PartialEq<u32> for BlankLines {
+    fn eq(&self, other: &u32) -> bool {
+        self.partial_cmp(other) == Some(Ordering::Equal)
+    }
+}
+
+impl PartialOrd<u32> for BlankLines {
+    fn partial_cmp(&self, other: &u32) -> Option<Ordering> {
+        self.count().partial_cmp(other)
+    }
+}
+
+impl PartialOrd for BlankLines {
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        Some(self.cmp(other))
+    }
+}
+
+impl Ord for BlankLines {
+    fn cmp(&self, other: &Self) -> Ordering {
+        self.count().cmp(&other.count())
+    }
+}
+
+impl PartialEq for BlankLines {
+    fn eq(&self, other: &Self) -> bool {
+        self.count() == other.count()
+    }
+}
+
+impl Eq for BlankLines {}
+
+#[derive(Copy, Clone, Debug, Default)]
+enum Follows {
+    #[default]
+    Other,
+    Decorator,
+    Def,
+    Docstring,
+}
+
+#[derive(Copy, Clone, Debug, Default)]
+enum Status {
+    /// Stores the indent level where the nesting started.
+    Inside(usize),
+    /// This is used to rectify a Inside switched to a Outside because of a dedented comment.
+    CommentAfter(usize),
+    #[default]
+    Outside,
+}
+
+impl Status {
+    fn update(&mut self, line: &LogicalLineInfo) {
+        match *self {
+            Status::Inside(nesting_indent) => {
+                if line.indent_length <= nesting_indent {
+                    if line.is_comment_only {
+                        *self = Status::CommentAfter(nesting_indent);
+                    } else {
+                        *self = Status::Outside;
+                    }
+                }
+            }
+            Status::CommentAfter(indent) => {
+                if !line.is_comment_only {
+                    if line.indent_length > indent {
+                        *self = Status::Inside(indent);
+                    } else {
+                        *self = Status::Outside;
+                    }
+                }
+            }
+            Status::Outside => {
+                // Nothing to do
+            }
+        }
+    }
+}
+
+/// Contains variables used for the linting of blank lines.
+#[derive(Debug, Default)]
+pub(crate) struct BlankLinesChecker {
+    follows: Follows,
+    fn_status: Status,
+    class_status: Status,
+    /// First line that is not a comment.
+    is_not_first_logical_line: bool,
+    /// Used for the fix in case a comment separates two non-comment logical lines to make the comment "stick"
+    /// to the second line instead of the first.
+    last_non_comment_line_end: TextSize,
+    previous_unindented_line_kind: Option<LogicalLineKind>,
+}
+
+impl BlankLinesChecker {
+    /// E301, E302, E303, E304, E305, E306
+    pub(crate) fn check_lines(
+        &mut self,
+        tokens: &[LexResult],
+        locator: &Locator,
+        stylist: &Stylist,
+        indent_width: IndentWidth,
+        diagnostics: &mut Vec<Diagnostic>,
+    ) {
+        let mut prev_indent_length: Option<usize> = None;
+        let line_preprocessor = LinePreprocessor::new(tokens, locator, indent_width);
+
+        for logical_line in line_preprocessor {
+            self.check_line(
+                &logical_line,
+                prev_indent_length,
+                locator,
+                stylist,
+                diagnostics,
+            );
+            if !logical_line.is_comment_only {
+                prev_indent_length = Some(logical_line.indent_length);
+            }
+        }
+    }
+
+    #[allow(clippy::nonminimal_bool)]
+    fn check_line(
+        &mut self,
+        line: &LogicalLineInfo,
+        prev_indent_length: Option<usize>,
+        locator: &Locator,
+        stylist: &Stylist,
+        diagnostics: &mut Vec<Diagnostic>,
+    ) {
+        self.class_status.update(line);
+        self.fn_status.update(line);
+
+        // Don't expect blank lines before the first non comment line.
+        if self.is_not_first_logical_line {
+            if line.preceding_blank_lines == 0
+                // Only applies to methods.
+                && matches!(line.kind,  LogicalLineKind::Function)
+                && matches!(self.class_status, Status::Inside(_))
+                // The class/parent method's docstring can directly precede the def.
+                // Allow following a decorator (if there is an error it will be triggered on the first decorator).
+                && !matches!(self.follows, Follows::Docstring | Follows::Decorator)
+                // Do not trigger when the def follows an if/while/etc...
+                && prev_indent_length.is_some_and(|prev_indent_length| prev_indent_length >= line.indent_length)
+            {
+                // E301
+                let mut diagnostic =
+                    Diagnostic::new(BlankLineBetweenMethods, line.first_token_range);
+                diagnostic.set_fix(Fix::safe_edit(Edit::insertion(
+                    stylist.line_ending().to_string(),
+                    locator.line_start(self.last_non_comment_line_end),
+                )));
+
+                diagnostics.push(diagnostic);
+            }
+
+            if line.preceding_blank_lines < BLANK_LINES_TOP_LEVEL
+                // Allow following a decorator (if there is an error it will be triggered on the first decorator).
+                && !matches!(self.follows, Follows::Decorator)
+                // Allow groups of one-liners.
+                && !(matches!(self.follows, Follows::Def) && !matches!(line.last_token, TokenKind::Colon))
+                // Only trigger on non-indented classes and functions (for example functions within an if are ignored)
+                && line.indent_length == 0
+                // Only apply to functions or classes.
+                && line.kind.is_top_level()
+            {
+                // E302
+                let mut diagnostic = Diagnostic::new(
+                    BlankLinesTopLevel {
+                        actual_blank_lines: line.preceding_blank_lines.count(),
+                    },
+                    line.first_token_range,
+                );
+
+                if let Some(blank_lines_range) = line.blank_lines.range() {
+                    diagnostic.set_fix(Fix::safe_edit(Edit::range_replacement(
+                        stylist.line_ending().repeat(BLANK_LINES_TOP_LEVEL as usize),
+                        blank_lines_range,
+                    )));
+                } else {
+                    diagnostic.set_fix(Fix::safe_edit(Edit::insertion(
+                        stylist.line_ending().repeat(BLANK_LINES_TOP_LEVEL as usize),
+                        locator.line_start(self.last_non_comment_line_end),
+                    )));
+                }
+
+                diagnostics.push(diagnostic);
+            }
+
+            let expected_blank_lines = if line.indent_length > 0 {
+                BLANK_LINES_METHOD_LEVEL
+            } else {
+                BLANK_LINES_TOP_LEVEL
+            };
+
+            if line.blank_lines > expected_blank_lines {
+                // E303
+                let mut diagnostic = Diagnostic::new(
+                    TooManyBlankLines {
+                        actual_blank_lines: line.blank_lines.count(),
+                    },
+                    line.first_token_range,
+                );
+
+                if let Some(blank_lines_range) = line.blank_lines.range() {
+                    diagnostic.set_fix(Fix::safe_edit(Edit::range_replacement(
+                        stylist.line_ending().repeat(expected_blank_lines as usize),
+                        blank_lines_range,
+                    )));
+                }
+
+                diagnostics.push(diagnostic);
+            }
+
+            if matches!(self.follows, Follows::Decorator)
+                && !line.is_comment_only
+                && line.preceding_blank_lines > 0
+            {
+                // E304
+                let mut diagnostic = Diagnostic::new(
+                    BlankLineAfterDecorator {
+                        actual_blank_lines: line.preceding_blank_lines.count(),
+                    },
+                    line.first_token_range,
+                );
+
+                // Get all the lines between the last decorator line (included) and the current line (included).
+                // Then remove all blank lines.
+                let trivia_range = TextRange::new(
+                    self.last_non_comment_line_end,
+                    locator.line_start(line.first_token_range.start()),
+                );
+                let trivia_text = locator.slice(trivia_range);
+                let mut trivia_without_blank_lines = trivia_text
+                    .universal_newlines()
+                    .filter_map(|line| {
+                        (!line.trim_whitespace().is_empty()).then_some(line.as_str())
+                    })
+                    .join(&stylist.line_ending());
+
+                let fix = if trivia_without_blank_lines.is_empty() {
+                    Fix::safe_edit(Edit::range_deletion(trivia_range))
+                } else {
+                    trivia_without_blank_lines.push_str(&stylist.line_ending());
+                    Fix::safe_edit(Edit::range_replacement(
+                        trivia_without_blank_lines,
+                        trivia_range,
+                    ))
+                };
+
+                diagnostic.set_fix(fix);
+
+                diagnostics.push(diagnostic);
+            }
+
+            if line.preceding_blank_lines < BLANK_LINES_TOP_LEVEL
+                && self
+                    .previous_unindented_line_kind
+                    .is_some_and(LogicalLineKind::is_top_level)
+                && line.indent_length == 0
+                && !line.is_comment_only
+                && !line.kind.is_top_level()
+            {
+                // E305
+                let mut diagnostic = Diagnostic::new(
+                    BlankLinesAfterFunctionOrClass {
+                        actual_blank_lines: line.preceding_blank_lines.count(),
+                    },
+                    line.first_token_range,
+                );
+
+                if let Some(blank_lines_range) = line.blank_lines.range() {
+                    diagnostic.set_fix(Fix::safe_edit(Edit::range_replacement(
+                        stylist.line_ending().repeat(BLANK_LINES_TOP_LEVEL as usize),
+                        blank_lines_range,
+                    )));
+                } else {
+                    diagnostic.set_fix(Fix::safe_edit(Edit::insertion(
+                        stylist.line_ending().repeat(BLANK_LINES_TOP_LEVEL as usize),
+                        locator.line_start(line.first_token_range.start()),
+                    )));
+                }
+
+                diagnostics.push(diagnostic);
+            }
+
+            if line.preceding_blank_lines == 0
+                // Only apply to nested functions.
+                && matches!(self.fn_status, Status::Inside(_))
+                && line.kind.is_top_level()
+                // Allow following a decorator (if there is an error it will be triggered on the first decorator).
+                && !matches!(self.follows, Follows::Decorator)
+                // The class's docstring can directly precede the first function.
+                && !matches!(self.follows, Follows::Docstring)
+                // Do not trigger when the def/class follows an "indenting token" (if/while/etc...).
+                && prev_indent_length.is_some_and(|prev_indent_length| prev_indent_length >= line.indent_length)
+                // Allow groups of one-liners.
+                && !(matches!(self.follows, Follows::Def) && line.last_token != TokenKind::Colon)
+            {
+                // E306
+                let mut diagnostic =
+                    Diagnostic::new(BlankLinesBeforeNestedDefinition, line.first_token_range);
+
+                diagnostic.set_fix(Fix::safe_edit(Edit::insertion(
+                    stylist.line_ending().to_string(),
+                    locator.line_start(line.first_token_range.start()),
+                )));
+
+                diagnostics.push(diagnostic);
+            }
+        }
+
+        match line.kind {
+            LogicalLineKind::Class => {
+                if matches!(self.class_status, Status::Outside) {
+                    self.class_status = Status::Inside(line.indent_length);
+                }
+                self.follows = Follows::Other;
+            }
+            LogicalLineKind::Decorator => {
+                self.follows = Follows::Decorator;
+            }
+            LogicalLineKind::Function => {
+                if matches!(self.fn_status, Status::Outside) {
+                    self.fn_status = Status::Inside(line.indent_length);
+                }
+                self.follows = Follows::Def;
+            }
+            LogicalLineKind::Comment => {}
+            LogicalLineKind::Other => {
+                self.follows = Follows::Other;
+            }
+        }
+
+        if line.is_docstring {
+            self.follows = Follows::Docstring;
+        }
+
+        if !line.is_comment_only {
+            self.is_not_first_logical_line = true;
+
+            self.last_non_comment_line_end = line.logical_line_end;
+
+            if line.indent_length == 0 {
+                self.previous_unindented_line_kind = Some(line.kind);
+            }
+        }
+    }
+}
+
+#[derive(Copy, Clone, Debug)]
+enum LogicalLineKind {
+    /// The clause header of a class definition
+    Class,
+    /// A decorator
+    Decorator,
+    /// The clause header of a function
+    Function,
+    /// A comment only line
+    Comment,
+    /// Any other statement or clause header
+    Other,
+}
+
+impl LogicalLineKind {
+    fn is_top_level(self) -> bool {
+        matches!(
+            self,
+            LogicalLineKind::Class | LogicalLineKind::Function | LogicalLineKind::Decorator
+        )
+    }
+}

crates/ruff_linter/src/rules/pycodestyle/rules/invalid_escape_sequence.rs

@@ -67,14 +67,14 @@ pub(crate) fn invalid_escape_sequence(
     token_range: TextRange,
 ) {
     let (token_source_code, string_start_location) = match token {
-        Tok::FStringMiddle { value, is_raw } => {
+        Tok::FStringMiddle { value, is_raw, .. } => {
             if *is_raw {
                 return;
             }
             let Some(range) = indexer.fstring_ranges().innermost(token_range.start()) else {
                 return;
             };
-            (value.as_str(), range.start())
+            (&**value, range.start())
         }
         Tok::String { kind, .. } => {
             if kind.is_raw() {

crates/ruff_linter/src/rules/pycodestyle/rules/literal_comparisons.rs

@@ -139,10 +139,10 @@ pub(crate) fn literal_comparisons(checker: &mut Checker, compare: &ast::ExprComp
 
     // Check `left`.
     let mut comparator = compare.left.as_ref();
-    let [op, ..] = compare.ops.as_slice() else {
+    let [op, ..] = &*compare.ops else {
         return;
     };
-    let [next, ..] = compare.comparators.as_slice() else {
+    let [next, ..] = &*compare.comparators else {
         return;
     };
 

crates/ruff_linter/src/rules/pycodestyle/rules/mod.rs

@@ -2,6 +2,7 @@ pub(crate) use ambiguous_class_name::*;
 pub(crate) use ambiguous_function_name::*;
 pub(crate) use ambiguous_variable_name::*;
 pub(crate) use bare_except::*;
+pub(crate) use blank_lines::*;
 pub(crate) use compound_statements::*;
 pub(crate) use doc_line_too_long::*;
 pub(crate) use errors::*;
@@ -23,6 +24,7 @@ mod ambiguous_class_name;
 mod ambiguous_function_name;
 mod ambiguous_variable_name;
 mod bare_except;
+mod blank_lines;
 mod compound_statements;
 mod doc_line_too_long;
 mod errors;

crates/ruff_linter/src/rules/pycodestyle/rules/not_tests.rs

@@ -90,7 +90,7 @@ pub(crate) fn not_tests(checker: &mut Checker, unary_op: &ast::ExprUnaryOp) {
         return;
     };
 
-    match ops.as_slice() {
+    match &**ops {
         [CmpOp::In] => {
             if checker.enabled(Rule::NotInTest) {
                 let mut diagnostic = Diagnostic::new(NotInTest, unary_op.operand.range());

crates/ruff_linter/src/rules/pycodestyle/rules/tab_indentation.rs

@@ -1,11 +1,8 @@
 use ruff_diagnostics::{Diagnostic, Violation};
 use ruff_macros::{derive_message_formats, violation};
 use ruff_python_index::Indexer;
-use ruff_python_parser::lexer::LexResult;
-use ruff_python_parser::Tok;
-use ruff_python_trivia::leading_indentation;
 use ruff_source_file::Locator;
-use ruff_text_size::{TextLen, TextRange, TextSize};
+use ruff_text_size::{TextRange, TextSize};
 
 /// ## What it does
 /// Checks for indentation that uses tabs.
@@ -48,44 +45,52 @@ impl Violation for TabIndentation {
 /// W191
 pub(crate) fn tab_indentation(
     diagnostics: &mut Vec<Diagnostic>,
-    tokens: &[LexResult],
     locator: &Locator,
     indexer: &Indexer,
 ) {
-    // Always check the first line for tab indentation as there's no newline
-    // token before it.
-    tab_indentation_at_line_start(diagnostics, locator, TextSize::default());
+    let contents = locator.contents().as_bytes();
+    let mut offset = 0;
+    while let Some(index) = memchr::memchr(b'\t', &contents[offset..]) {
+        // If we find a tab in the file, grab the entire line.
+        let range = locator.full_line_range(TextSize::try_from(offset + index).unwrap());
 
-    for (tok, range) in tokens.iter().flatten() {
-        if matches!(tok, Tok::Newline | Tok::NonLogicalNewline) {
-            tab_indentation_at_line_start(diagnostics, locator, range.end());
+        // Determine whether the tab is part of the line's indentation.
+        if let Some(indent) = tab_indentation_at_line_start(range.start(), locator, indexer) {
+            diagnostics.push(Diagnostic::new(TabIndentation, indent));
+        }
+
+        // Advance to the next line.
+        offset = range.end().to_usize();
+    }
+}
+
+/// If a line includes tabs in its indentation, returns the range of the
+/// indent.
+fn tab_indentation_at_line_start(
+    line_start: TextSize,
+    locator: &Locator,
+    indexer: &Indexer,
+) -> Option<TextRange> {
+    let mut contains_tab = false;
+    for (i, char) in locator.after(line_start).as_bytes().iter().enumerate() {
+        match char {
+            // If we find a tab character, report it as a violation.
+            b'\t' => {
+                contains_tab = true;
+            }
+            // If we find a space, continue.
+            b' ' | b'\x0C' => {}
+            // If we find a non-whitespace character, stop.
+            _ => {
+                if contains_tab {
+                    let range = TextRange::at(line_start, TextSize::try_from(i).unwrap());
+                    if !indexer.multiline_ranges().contains_range(range) {
+                        return Some(range);
+                    }
+                }
+                break;
+            }
         }
     }
-
-    // The lexer doesn't emit `Newline` / `NonLogicalNewline` for a line
-    // continuation character (`\`), so we need to manually check for tab
-    // indentation for lines that follow a line continuation character.
-    for continuation_line in indexer.continuation_line_starts() {
-        tab_indentation_at_line_start(
-            diagnostics,
-            locator,
-            locator.full_line_end(*continuation_line),
-        );
-    }
-}
-
-/// Checks for indentation that uses tabs for a line starting at
-/// the given [`TextSize`].
-fn tab_indentation_at_line_start(
-    diagnostics: &mut Vec<Diagnostic>,
-    locator: &Locator,
-    line_start: TextSize,
-) {
-    let indent = leading_indentation(locator.after(line_start));
-    if indent.find('\t').is_some() {
-        diagnostics.push(Diagnostic::new(
-            TabIndentation,
-            TextRange::at(line_start, indent.text_len()),
-        ));
-    }
+    None
 }

crates/ruff_linter/src/rules/pycodestyle/snapshots/ruff_linter__rules__pycodestyle__tests__E301_E30.py.snap

@@ -0,0 +1,44 @@
+---
+source: crates/ruff_linter/src/rules/pycodestyle/mod.rs
+---
+E30.py:453:5: E301 [*] Expected 1 blank line, found 0
+    |
+451 |     def func1():
+452 |         pass
+453 |     def func2():
+    |     ^^^ E301
+454 |         pass
+455 | # end
+    |
+    = help: Add missing blank line
+
+ℹ Safe fix
+450 450 | 
+451 451 |     def func1():
+452 452 |         pass
+    453 |+
+453 454 |     def func2():
+454 455 |         pass
+455 456 | # end
+
+E30.py:464:5: E301 [*] Expected 1 blank line, found 0
+    |
+462 |         pass
+463 |     # comment
+464 |     def fn2():
+    |     ^^^ E301
+465 |         pass
+466 | # end
+    |
+    = help: Add missing blank line
+
+ℹ Safe fix
+460 460 | 
+461 461 |     def fn1():
+462 462 |         pass
+    463 |+
+463 464 |     # comment
+464 465 |     def fn2():
+465 466 |         pass
+
+

crates/ruff_linter/src/rules/pycodestyle/snapshots/ruff_linter__rules__pycodestyle__tests__E302_E30.py.snap

@@ -0,0 +1,187 @@
+---
+source: crates/ruff_linter/src/rules/pycodestyle/mod.rs
+---
+E30.py:471:1: E302 [*] Expected 2 blank lines, found 0
+    |
+469 | # E302
+470 | """Main module."""
+471 | def fn():
+    | ^^^ E302
+472 |     pass
+473 | # end
+    |
+    = help: Add missing blank line(s)
+
+ℹ Safe fix
+468 468 | 
+469 469 | # E302
+470 470 | """Main module."""
+    471 |+
+    472 |+
+471 473 | def fn():
+472 474 |     pass
+473 475 | # end
+
+E30.py:478:1: E302 [*] Expected 2 blank lines, found 0
+    |
+476 | # E302
+477 | import sys
+478 | def get_sys_path():
+    | ^^^ E302
+479 |     return sys.path
+480 | # end
+    |
+    = help: Add missing blank line(s)
+
+ℹ Safe fix
+475 475 | 
+476 476 | # E302
+477 477 | import sys
+    478 |+
+    479 |+
+478 480 | def get_sys_path():
+479 481 |     return sys.path
+480 482 | # end
+
+E30.py:487:1: E302 [*] Expected 2 blank lines, found 1
+    |
+485 |     pass
+486 | 
+487 | def b():
+    | ^^^ E302
+488 |     pass
+489 | # end
+    |
+    = help: Add missing blank line(s)
+
+ℹ Safe fix
+484 484 | def a():
+485 485 |     pass
+486 486 | 
+    487 |+
+487 488 | def b():
+488 489 |     pass
+489 490 | # end
+
+E30.py:498:1: E302 [*] Expected 2 blank lines, found 1
+    |
+496 | # comment
+497 | 
+498 | def b():
+    | ^^^ E302
+499 |     pass
+500 | # end
+    |
+    = help: Add missing blank line(s)
+
+ℹ Safe fix
+495 495 | 
+496 496 | # comment
+497 497 | 
+    498 |+
+498 499 | def b():
+499 500 |     pass
+500 501 | # end
+
+E30.py:507:1: E302 [*] Expected 2 blank lines, found 1
+    |
+505 |     pass
+506 | 
+507 | async def b():
+    | ^^^^^ E302
+508 |     pass
+509 | # end
+    |
+    = help: Add missing blank line(s)
+
+ℹ Safe fix
+504 504 | def a():
+505 505 |     pass
+506 506 | 
+    507 |+
+507 508 | async def b():
+508 509 |     pass
+509 510 | # end
+
+E30.py:516:1: E302 [*] Expected 2 blank lines, found 1
+    |
+514 |     pass
+515 | 
+516 | async  def x(y: int = 1):
+    | ^^^^^ E302
+517 |     pass
+518 | # end
+    |
+    = help: Add missing blank line(s)
+
+ℹ Safe fix
+513 513 | async  def x():
+514 514 |     pass
+515 515 | 
+    516 |+
+516 517 | async  def x(y: int = 1):
+517 518 |     pass
+518 519 | # end
+
+E30.py:524:1: E302 [*] Expected 2 blank lines, found 0
+    |
+522 | def bar():
+523 |     pass
+524 | def baz(): pass
+    | ^^^ E302
+525 | # end
+    |
+    = help: Add missing blank line(s)
+
+ℹ Safe fix
+521 521 | # E302
+522 522 | def bar():
+523 523 |     pass
+    524 |+
+    525 |+
+524 526 | def baz(): pass
+525 527 | # end
+526 528 | 
+
+E30.py:530:1: E302 [*] Expected 2 blank lines, found 0
+    |
+528 | # E302
+529 | def bar(): pass
+530 | def baz():
+    | ^^^ E302
+531 |     pass
+532 | # end
+    |
+    = help: Add missing blank line(s)
+
+ℹ Safe fix
+527 527 | 
+528 528 | # E302
+529 529 | def bar(): pass
+    530 |+
+    531 |+
+530 532 | def baz():
+531 533 |     pass
+532 534 | # end
+
+E30.py:540:1: E302 [*] Expected 2 blank lines, found 1
+    |
+539 | # comment
+540 | @decorator
+    | ^ E302
+541 | def g():
+542 |     pass
+    |
+    = help: Add missing blank line(s)
+
+ℹ Safe fix
+536 536 | def f():
+537 537 |     pass
+538 538 | 
+    539 |+
+    540 |+
+539 541 | # comment
+540 542 | @decorator
+541 543 | def g():
+
+

crates/ruff_linter/src/rules/pycodestyle/snapshots/ruff_linter__rules__pycodestyle__tests__E303_E30.py.snap

@@ -0,0 +1,250 @@
+---
+source: crates/ruff_linter/src/rules/pycodestyle/mod.rs
+---
+E30.py:555:2: E303 [*] Too many blank lines (2)
+    |
+555 |     def method2():
+    |     ^^^ E303
+556 |         return 22
+557 | # end
+    |
+    = help: Remove extraneous blank line(s)
+
+ℹ Safe fix
+551 551 | 	def method1():
+552 552 | 		return 1
+553 553 | 		
+554     |-		
+555 554 | 	def method2():
+556 555 | 		return 22
+557 556 | # end
+
+E30.py:565:5: E303 [*] Too many blank lines (2)
+    |
+565 |     # arbitrary comment
+    |     ^^^^^^^^^^^^^^^^^^^ E303
+566 | 
+567 |     def inner():  # E306 not expected (pycodestyle detects E306)
+    |
+    = help: Remove extraneous blank line(s)
+
+ℹ Safe fix
+561 561 | def fn():
+562 562 |     _ = None
+563 563 | 
+564     |-
+565 564 |     # arbitrary comment
+566 565 | 
+567 566 |     def inner():  # E306 not expected (pycodestyle detects E306)
+
+E30.py:577:5: E303 [*] Too many blank lines (2)
+    |
+577 |     # arbitrary comment
+    |     ^^^^^^^^^^^^^^^^^^^ E303
+578 |     def inner():  # E306 not expected (pycodestyle detects E306)
+579 |         pass
+    |
+    = help: Remove extraneous blank line(s)
+
+ℹ Safe fix
+573 573 | def fn():
+574 574 |     _ = None
+575 575 | 
+576     |-
+577 576 |     # arbitrary comment
+578 577 |     def inner():  # E306 not expected (pycodestyle detects E306)
+579 578 |         pass
+
+E30.py:588:1: E303 [*] Too many blank lines (3)
+    |
+588 | print()
+    | ^^^^^ E303
+589 | # end
+    |
+    = help: Remove extraneous blank line(s)
+
+ℹ Safe fix
+584 584 | print()
+585 585 | 
+586 586 | 
+587     |-
+588 587 | print()
+589 588 | # end
+590 589 | 
+
+E30.py:597:1: E303 [*] Too many blank lines (3)
+    |
+597 | # comment
+    | ^^^^^^^^^ E303
+598 | 
+599 | print()
+    |
+    = help: Remove extraneous blank line(s)
+
+ℹ Safe fix
+593 593 | print()
+594 594 | 
+595 595 | 
+596     |-
+597 596 | # comment
+598 597 | 
+599 598 | print()
+
+E30.py:608:5: E303 [*] Too many blank lines (2)
+    |
+608 |     # comment
+    |     ^^^^^^^^^ E303
+    |
+    = help: Remove extraneous blank line(s)
+
+ℹ Safe fix
+604 604 | def a():
+605 605 |     print()
+606 606 | 
+607     |-
+608 607 |     # comment
+609 608 | 
+610 609 | 
+
+E30.py:611:5: E303 [*] Too many blank lines (2)
+    |
+611 |     # another comment
+    |     ^^^^^^^^^^^^^^^^^ E303
+612 | 
+613 |     print()
+    |
+    = help: Remove extraneous blank line(s)
+
+ℹ Safe fix
+607 607 | 
+608 608 |     # comment
+609 609 | 
+610     |-
+611 610 |     # another comment
+612 611 | 
+613 612 |     print()
+
+E30.py:622:1: E303 [*] Too many blank lines (3)
+    |
+622 | / """This class docstring comes on line 5.
+623 | | It gives error E303: too many blank lines (3)
+624 | | """
+    | |___^ E303
+625 |   # end
+    |
+    = help: Remove extraneous blank line(s)
+
+ℹ Safe fix
+618 618 | #!python
+619 619 | 
+620 620 | 
+621     |-
+622 621 | """This class docstring comes on line 5.
+623 622 | It gives error E303: too many blank lines (3)
+624 623 | """
+
+E30.py:634:5: E303 [*] Too many blank lines (2)
+    |
+634 |     def b(self):
+    |     ^^^ E303
+635 |         pass
+636 | # end
+    |
+    = help: Remove extraneous blank line(s)
+
+ℹ Safe fix
+630 630 |     def a(self):
+631 631 |         pass
+632 632 | 
+633     |-
+634 633 |     def b(self):
+635 634 |         pass
+636 635 | # end
+
+E30.py:644:5: E303 [*] Too many blank lines (2)
+    |
+644 |     a = 2
+    |     ^ E303
+645 | # end
+    |
+    = help: Remove extraneous blank line(s)
+
+ℹ Safe fix
+640 640 | if True:
+641 641 |     a = 1
+642 642 | 
+643     |-
+644 643 |     a = 2
+645 644 | # end
+646 645 | 
+
+E30.py:652:5: E303 [*] Too many blank lines (2)
+    |
+652 |     # comment
+    |     ^^^^^^^^^ E303
+    |
+    = help: Remove extraneous blank line(s)
+
+ℹ Safe fix
+648 648 | # E303
+649 649 | class Test:
+650 650 | 
+651     |-
+652 651 |     # comment
+653 652 | 
+654 653 | 
+
+E30.py:655:5: E303 [*] Too many blank lines (2)
+    |
+655 |     # another comment
+    |     ^^^^^^^^^^^^^^^^^ E303
+656 | 
+657 |     def test(self): pass
+    |
+    = help: Remove extraneous blank line(s)
+
+ℹ Safe fix
+651 651 | 
+652 652 |     # comment
+653 653 | 
+654     |-
+655 654 |     # another comment
+656 655 | 
+657 656 |     def test(self): pass
+
+E30.py:669:5: E303 [*] Too many blank lines (2)
+    |
+669 |     def b(self):
+    |     ^^^ E303
+670 |         pass
+671 | # end
+    |
+    = help: Remove extraneous blank line(s)
+
+ℹ Safe fix
+665 665 | 
+666 666 | # wrongly indented comment
+667 667 | 
+668     |-
+669 668 |     def b(self):
+670 669 |         pass
+671 670 | # end
+
+E30.py:679:5: E303 [*] Too many blank lines (2)
+    |
+679 |     pass
+    |     ^^^^ E303
+680 | # end
+    |
+    = help: Remove extraneous blank line(s)
+
+ℹ Safe fix
+675 675 | def fn():
+676 676 |     pass
+677 677 | 
+678     |- 
+679 678 |     pass
+680 679 | # end
+681 680 | 
+
+

crates/ruff_linter/src/rules/pycodestyle/snapshots/ruff_linter__rules__pycodestyle__tests__E304_E30.py.snap

@@ -0,0 +1,65 @@
+---
+source: crates/ruff_linter/src/rules/pycodestyle/mod.rs
+---
+E30.py:686:1: E304 [*] Blank lines found after function decorator (1)
+    |
+684 | @decorator
+685 | 
+686 | def function():
+    | ^^^ E304
+687 |     pass
+688 | # end
+    |
+    = help: Remove extraneous blank line(s)
+
+ℹ Safe fix
+682 682 | 
+683 683 | # E304
+684 684 | @decorator
+685     |-
+686 685 | def function():
+687 686 |     pass
+688 687 | # end
+
+E30.py:695:1: E304 [*] Blank lines found after function decorator (1)
+    |
+694 | # comment    E304 not expected
+695 | def function():
+    | ^^^ E304
+696 |     pass
+697 | # end
+    |
+    = help: Remove extraneous blank line(s)
+
+ℹ Safe fix
+690 690 | 
+691 691 | # E304
+692 692 | @decorator
+693     |-
+694 693 | # comment    E304 not expected
+695 694 | def function():
+696 695 |     pass
+
+E30.py:707:1: E304 [*] Blank lines found after function decorator (2)
+    |
+706 | # second comment  E304 not expected
+707 | def function():
+    | ^^^ E304
+708 |     pass
+709 | # end
+    |
+    = help: Remove extraneous blank line(s)
+
+ℹ Safe fix
+699 699 | 
+700 700 | # E304
+701 701 | @decorator
+702     |-
+703 702 | # comment  E304 not expected
+704     |-
+705     |-
+706 703 | # second comment  E304 not expected
+707 704 | def function():
+708 705 |     pass
+
+

crates/ruff_linter/src/rules/pycodestyle/snapshots/ruff_linter__rules__pycodestyle__tests__E305_E30.py.snap

@@ -0,0 +1,102 @@
+---
+source: crates/ruff_linter/src/rules/pycodestyle/mod.rs
+---
+E30.py:719:1: E305 [*] Expected 2 blank lines after class or function definition, found (1)
+    |
+718 |     # another comment
+719 | fn()
+    | ^^ E305
+720 | # end
+    |
+    = help: Add missing blank line(s)
+
+ℹ Safe fix
+716 716 |     # comment
+717 717 | 
+718 718 |     # another comment
+    719 |+
+    720 |+
+719 721 | fn()
+720 722 | # end
+721 723 | 
+
+E30.py:730:1: E305 [*] Expected 2 blank lines after class or function definition, found (1)
+    |
+729 |     # another comment
+730 | a = 1
+    | ^ E305
+731 | # end
+    |
+    = help: Add missing blank line(s)
+
+ℹ Safe fix
+727 727 |     # comment
+728 728 | 
+729 729 |     # another comment
+    730 |+
+    731 |+
+730 732 | a = 1
+731 733 | # end
+732 734 | 
+
+E30.py:742:1: E305 [*] Expected 2 blank lines after class or function definition, found (1)
+    |
+740 |     # another comment
+741 | 
+742 | try:
+    | ^^^ E305
+743 |     fn()
+744 | except Exception:
+    |
+    = help: Add missing blank line(s)
+
+ℹ Safe fix
+739 739 | 
+740 740 |     # another comment
+741 741 | 
+    742 |+
+742 743 | try:
+743 744 |     fn()
+744 745 | except Exception:
+
+E30.py:754:1: E305 [*] Expected 2 blank lines after class or function definition, found (1)
+    |
+753 | # Two spaces before comments, too.
+754 | if a():
+    | ^^ E305
+755 |     a()
+756 | # end
+    |
+    = help: Add missing blank line(s)
+
+ℹ Safe fix
+751 751 |     print()
+752 752 | 
+753 753 | # Two spaces before comments, too.
+    754 |+
+    755 |+
+754 756 | if a():
+755 757 |     a()
+756 758 | # end
+
+E30.py:767:1: E305 [*] Expected 2 blank lines after class or function definition, found (1)
+    |
+765 |     blah, blah
+766 | 
+767 | if __name__ == '__main__':
+    | ^^ E305
+768 |     main()
+769 | # end
+    |
+    = help: Add missing blank line(s)
+
+ℹ Safe fix
+764 764 | def main():
+765 765 |     blah, blah
+766 766 | 
+    767 |+
+767 768 | if __name__ == '__main__':
+768 769 |     main()
+769 770 | # end
+
+

crates/ruff_linter/src/rules/pycodestyle/snapshots/ruff_linter__rules__pycodestyle__tests__E306_E30.py.snap

@@ -0,0 +1,223 @@
+---
+source: crates/ruff_linter/src/rules/pycodestyle/mod.rs
+---
+E30.py:775:5: E306 [*] Expected 1 blank line before a nested definition, found 0
+    |
+773 | def a():
+774 |     x = 1
+775 |     def b():
+    |     ^^^ E306
+776 |         pass
+777 | # end
+    |
+    = help: Add missing blank line
+
+ℹ Safe fix
+772 772 | # E306:3:5
+773 773 | def a():
+774 774 |     x = 1
+    775 |+
+775 776 |     def b():
+776 777 |         pass
+777 778 | # end
+
+E30.py:783:5: E306 [*] Expected 1 blank line before a nested definition, found 0
+    |
+781 | async def a():
+782 |     x = 1
+783 |     def b():
+    |     ^^^ E306
+784 |         pass
+785 | # end
+    |
+    = help: Add missing blank line
+
+ℹ Safe fix
+780 780 | #: E306:3:5
+781 781 | async def a():
+782 782 |     x = 1
+    783 |+
+783 784 |     def b():
+784 785 |         pass
+785 786 | # end
+
+E30.py:791:5: E306 [*] Expected 1 blank line before a nested definition, found 0
+    |
+789 | def a():
+790 |     x = 2
+791 |     def b():
+    |     ^^^ E306
+792 |         x = 1
+793 |         def c():
+    |
+    = help: Add missing blank line
+
+ℹ Safe fix
+788 788 | #: E306:3:5 E306:5:9
+789 789 | def a():
+790 790 |     x = 2
+    791 |+
+791 792 |     def b():
+792 793 |         x = 1
+793 794 |         def c():
+
+E30.py:793:9: E306 [*] Expected 1 blank line before a nested definition, found 0
+    |
+791 |     def b():
+792 |         x = 1
+793 |         def c():
+    |         ^^^ E306
+794 |             pass
+795 | # end
+    |
+    = help: Add missing blank line
+
+ℹ Safe fix
+790 790 |     x = 2
+791 791 |     def b():
+792 792 |         x = 1
+    793 |+
+793 794 |         def c():
+794 795 |             pass
+795 796 | # end
+
+E30.py:801:5: E306 [*] Expected 1 blank line before a nested definition, found 0
+    |
+799 | def a():
+800 |     x = 1
+801 |     class C:
+    |     ^^^^^ E306
+802 |         pass
+803 |     x = 2
+    |
+    = help: Add missing blank line
+
+ℹ Safe fix
+798 798 | # E306:3:5 E306:6:5
+799 799 | def a():
+800 800 |     x = 1
+    801 |+
+801 802 |     class C:
+802 803 |         pass
+803 804 |     x = 2
+
+E30.py:804:5: E306 [*] Expected 1 blank line before a nested definition, found 0
+    |
+802 |         pass
+803 |     x = 2
+804 |     def b():
+    |     ^^^ E306
+805 |         pass
+806 | # end
+    |
+    = help: Add missing blank line
+
+ℹ Safe fix
+801 801 |     class C:
+802 802 |         pass
+803 803 |     x = 2
+    804 |+
+804 805 |     def b():
+805 806 |         pass
+806 807 | # end
+
+E30.py:813:5: E306 [*] Expected 1 blank line before a nested definition, found 0
+    |
+811 |     def bar():
+812 |         pass
+813 |     def baz(): pass
+    |     ^^^ E306
+814 | # end
+    |
+    = help: Add missing blank line
+
+ℹ Safe fix
+810 810 | def foo():
+811 811 |     def bar():
+812 812 |         pass
+    813 |+
+813 814 |     def baz(): pass
+814 815 | # end
+815 816 | 
+
+E30.py:820:5: E306 [*] Expected 1 blank line before a nested definition, found 0
+    |
+818 | def foo():
+819 |     def bar(): pass
+820 |     def baz():
+    |     ^^^ E306
+821 |         pass
+822 | # end
+    |
+    = help: Add missing blank line
+
+ℹ Safe fix
+817 817 | # E306:3:5
+818 818 | def foo():
+819 819 |     def bar(): pass
+    820 |+
+820 821 |     def baz():
+821 822 |         pass
+822 823 | # end
+
+E30.py:828:5: E306 [*] Expected 1 blank line before a nested definition, found 0
+    |
+826 | def a():
+827 |     x = 2
+828 |     @decorator
+    |     ^ E306
+829 |     def b():
+830 |         pass
+    |
+    = help: Add missing blank line
+
+ℹ Safe fix
+825 825 | # E306
+826 826 | def a():
+827 827 |     x = 2
+    828 |+
+828 829 |     @decorator
+829 830 |     def b():
+830 831 |         pass
+
+E30.py:837:5: E306 [*] Expected 1 blank line before a nested definition, found 0
+    |
+835 | def a():
+836 |     x = 2
+837 |     @decorator
+    |     ^ E306
+838 |     async def b():
+839 |         pass
+    |
+    = help: Add missing blank line
+
+ℹ Safe fix
+834 834 | # E306
+835 835 | def a():
+836 836 |     x = 2
+    837 |+
+837 838 |     @decorator
+838 839 |     async def b():
+839 840 |         pass
+
+E30.py:846:5: E306 [*] Expected 1 blank line before a nested definition, found 0
+    |
+844 | def a():
+845 |     x = 2
+846 |     async def b():
+    |     ^^^^^ E306
+847 |         pass
+848 | # end
+    |
+    = help: Add missing blank line
+
+ℹ Safe fix
+843 843 | # E306
+844 844 | def a():
+845 845 |     x = 2
+    846 |+
+846 847 |     async def b():
+847 848 |         pass
+848 849 | # end
+
+

crates/ruff_linter/src/rules/pycodestyle/snapshots/ruff_linter__rules__pycodestyle__tests__W291_W291.py.snap

@@ -13,5 +13,65 @@ W291.py:1:23: W291 [*] Trailing whitespace
 1   |-'''trailing whitespace 
   1 |+'''trailing whitespace
 2 2 | inside a multiline string'''
+3 3 | 
+4 4 | f'''trailing whitespace 
+
+W291.py:4:24: W291 [*] Trailing whitespace
+  |
+2 | inside a multiline string'''
+3 | 
+4 | f'''trailing whitespace 
+  |                        ^ W291
+5 | inside a multiline f-string'''
+  |
+  = help: Remove trailing whitespace
+
+ℹ Unsafe fix
+1 1 | '''trailing whitespace 
+2 2 | inside a multiline string'''
+3 3 | 
+4   |-f'''trailing whitespace 
+  4 |+f'''trailing whitespace
+5 5 | inside a multiline f-string'''
+6 6 | 
+7 7 | # Trailing whitespace after `{`
+
+W291.py:8:8: W291 [*] Trailing whitespace
+   |
+ 7 | # Trailing whitespace after `{`
+ 8 | f'abc { 
+   |        ^ W291
+ 9 |     1 + 2
+10 | }'
+   |
+   = help: Remove trailing whitespace
+
+ℹ Safe fix
+5 5 | inside a multiline f-string'''
+6 6 | 
+7 7 | # Trailing whitespace after `{`
+8   |-f'abc { 
+  8 |+f'abc {
+9 9 |     1 + 2
+10 10 | }'
+11 11 | 
+
+W291.py:14:10: W291 [*] Trailing whitespace
+   |
+12 | # Trailing whitespace after `2`
+13 | f'abc {
+14 |     1 + 2 
+   |          ^ W291
+15 | }'
+   |
+   = help: Remove trailing whitespace
+
+ℹ Safe fix
+11 11 | 
+12 12 | # Trailing whitespace after `2`
+13 13 | f'abc {
+14    |-    1 + 2 
+   14 |+    1 + 2
+15 15 | }'
 
 

crates/ruff_linter/src/rules/pydocstyle/rules/sections.rs

@@ -1634,12 +1634,13 @@ fn common_section(
     let line_end = checker.stylist().line_ending().as_str();
 
     if let Some(next) = next {
-        if context
-            .following_lines()
-            .last()
-            .map_or(true, |line| !line.trim().is_empty())
-        {
-            if checker.enabled(Rule::NoBlankLineAfterSection) {
+        if checker.enabled(Rule::NoBlankLineAfterSection) {
+            let num_blank_lines = context
+                .following_lines()
+                .rev()
+                .take_while(|line| line.trim().is_empty())
+                .count();
+            if num_blank_lines < 2 {
                 let mut diagnostic = Diagnostic::new(
                     NoBlankLineAfterSection {
                         name: context.section_name().to_string(),
@@ -1657,13 +1658,13 @@ fn common_section(
     } else {
         // The first blank line is the line containing the closing triple quotes, so we need at
         // least two.
-        let num_blank_lines = context
-            .following_lines()
-            .rev()
-            .take_while(|line| line.trim().is_empty())
-            .count();
-        if num_blank_lines < 2 {
-            if checker.enabled(Rule::BlankLineAfterLastSection) {
+        if checker.enabled(Rule::BlankLineAfterLastSection) {
+            let num_blank_lines = context
+                .following_lines()
+                .rev()
+                .take_while(|line| line.trim().is_empty())
+                .count();
+            if num_blank_lines < 2 {
                 let mut diagnostic = Diagnostic::new(
                     BlankLineAfterLastSection {
                         name: context.section_name().to_string(),

crates/ruff_linter/src/rules/pydocstyle/snapshots/ruff_linter__rules__pydocstyle__tests__D214_sections.py.snap

@@ -49,5 +49,7 @@ sections.py:558:5: D214 [*] Section is over-indented ("Returns")
 563     |-        Returns:
     563 |+    Returns:
 564 564 |     """
+565 565 | 
+566 566 | 
 
 

crates/ruff_linter/src/rules/pydocstyle/snapshots/ruff_linter__rules__pydocstyle__tests__D406_sections.py.snap

@@ -61,4 +61,31 @@ sections.py:216:5: D406 [*] Section name should end with a newline ("Raises")
 229 229 | 
 230 230 |     """
 
+sections.py:588:5: D406 [*] Section name should end with a newline ("Parameters")
+    |
+587 |   def test_lowercase_sub_section_header_should_be_valid(parameters: list[str], value: int):  # noqa: D213
+588 |       """Test that lower case subsection header is valid even if it has the same name as section kind.
+    |  _____^
+589 | | 
+590 | |     Parameters:
+591 | |     ----------
+592 | |     parameters:
+593 | |         A list of string parameters
+594 | |     value:
+595 | |         Some value
+596 | |     """
+    | |_______^ D406
+    |
+    = help: Add newline after "Parameters"
+
+ℹ Safe fix
+587 587 | def test_lowercase_sub_section_header_should_be_valid(parameters: list[str], value: int):  # noqa: D213
+588 588 |     """Test that lower case subsection header is valid even if it has the same name as section kind.
+589 589 | 
+590     |-    Parameters:
+    590 |+    Parameters
+591 591 |     ----------
+592 592 |     parameters:
+593 593 |         A list of string parameters
+
 

crates/ruff_linter/src/rules/pydocstyle/snapshots/ruff_linter__rules__pydocstyle__tests__D407_sections.py.snap

@@ -567,5 +567,32 @@ sections.py:558:5: D407 [*] Missing dashed underline after section ("Returns")
 563 563 |         Returns:
     564 |+    -------
 564 565 |     """
+565 566 | 
+566 567 | 
+
+sections.py:600:4: D407 [*] Missing dashed underline after section ("Parameters")
+    |
+599 |   def test_lowercase_sub_section_header_different_kind(returns: int):
+600 |      """Test that lower case subsection header is valid even if it is of a different kind.
+    |  ____^
+601 | | 
+602 | |    Parameters
+603 | |    -‐-----------------
+604 | |    returns:
+605 | |        some value
+606 | | 
+607 | |    """
+    | |______^ D407
+    |
+    = help: Add dashed line under "Parameters"
+
+ℹ Safe fix
+600 600 |    """Test that lower case subsection header is valid even if it is of a different kind.
+601 601 | 
+602 602 |    Parameters
+    603 |+   ----------
+603 604 |    -‐-----------------
+604 605 |    returns:
+605 606 |        some value
 
 

crates/ruff_linter/src/rules/pydocstyle/snapshots/ruff_linter__rules__pydocstyle__tests__D409_sections.py.snap

@@ -61,4 +61,39 @@ sections.py:216:5: D409 [*] Section underline should match the length of its nam
 227 227 |     Raises:
 228 228 |     My attention.
 
+sections.py:568:5: D409 [*] Section underline should match the length of its name ("Other Parameters")
+    |
+567 |   def test_method_should_be_correctly_capitalized(parameters: list[str], other_parameters: dict[str, str]): # noqa: D213
+568 |       """Test parameters and attributes sections are capitalized correctly.
+    |  _____^
+569 | | 
+570 | |     Parameters
+571 | |     ----------
+572 | |     parameters:
+573 | |         A list of string parameters
+574 | |     other_parameters:
+575 | |         A dictionary of string attributes
+576 | | 
+577 | |     Other Parameters
+578 | |     ----------
+579 | |     other_parameters:
+580 | |         A dictionary of string attributes
+581 | |     parameters:
+582 | |         A list of string parameters
+583 | | 
+584 | |     """
+    | |_______^ D409
+    |
+    = help: Adjust underline length to match "Other Parameters"
+
+ℹ Safe fix
+575 575 |         A dictionary of string attributes
+576 576 | 
+577 577 |     Other Parameters
+578     |-    ----------
+    578 |+    ----------------
+579 579 |     other_parameters:
+580 580 |         A dictionary of string attributes
+581 581 |     parameters:
+
 

crates/ruff_linter/src/rules/pydocstyle/snapshots/ruff_linter__rules__pydocstyle__tests__D413_D413.py.snap

@@ -21,10 +21,9 @@ D413.py:1:1: D413 [*] Missing blank line after last section ("Returns")
 7  7  | Returns:
 8  8  |     the value
    9  |+
-   10 |+
-9  11 | """
-10 12 | 
-11 13 | 
+9  10 | """
+10 11 | 
+11 12 | 
 
 D413.py:13:5: D413 [*] Missing blank line after last section ("Returns")
    |

crates/ruff_linter/src/rules/pydocstyle/snapshots/ruff_linter__rules__pydocstyle__tests__D413_sections.py.snap

@@ -161,5 +161,33 @@ sections.py:558:5: D413 [*] Missing blank line after last section ("Returns")
 563 563 |         Returns:
     564 |+    
 564 565 |     """
+565 566 | 
+566 567 | 
+
+sections.py:588:5: D413 [*] Missing blank line after last section ("Parameters")
+    |
+587 |   def test_lowercase_sub_section_header_should_be_valid(parameters: list[str], value: int):  # noqa: D213
+588 |       """Test that lower case subsection header is valid even if it has the same name as section kind.
+    |  _____^
+589 | | 
+590 | |     Parameters:
+591 | |     ----------
+592 | |     parameters:
+593 | |         A list of string parameters
+594 | |     value:
+595 | |         Some value
+596 | |     """
+    | |_______^ D413
+    |
+    = help: Add blank line after "Parameters"
+
+ℹ Safe fix
+593 593 |         A list of string parameters
+594 594 |     value:
+595 595 |         Some value
+    596 |+    
+596 597 |     """
+597 598 | 
+598 599 | 
 
 

crates/ruff_linter/src/rules/pygrep_hooks/rules/blanket_type_ignore.rs

@@ -31,7 +31,13 @@ use ruff_text_size::TextSize;
 /// ```
 ///
 /// ## References
-/// - [mypy](https://mypy.readthedocs.io/en/stable/common_issues.html#spurious-errors-and-locally-silencing-the-checker)
+/// Mypy supports a [built-in setting](https://mypy.readthedocs.io/en/stable/error_code_list2.html#check-that-type-ignore-include-an-error-code-ignore-without-code)
+/// to enforce that all `type: ignore` annotations include an error code, akin
+/// to enabling this rule:
+/// ```toml
+/// [tool.mypy]
+/// enable_error_code = ["ignore-without-code"]
+/// ```
 #[violation]
 pub struct BlanketTypeIgnore;
 

crates/ruff_linter/src/rules/pylint/rules/comparison_with_itself.rs

@@ -84,10 +84,10 @@ pub(crate) fn comparison_with_itself(
                 {
                     continue;
                 }
-                let [Expr::Name(left_arg)] = left_call.arguments.args.as_slice() else {
+                let [Expr::Name(left_arg)] = &*left_call.arguments.args else {
                     continue;
                 };
-                let [Expr::Name(right_right)] = right_call.arguments.args.as_slice() else {
+                let [Expr::Name(right_right)] = &*right_call.arguments.args else {
                     continue;
                 };
                 if left_arg.id != right_right.id {

crates/ruff_linter/src/rules/pylint/rules/duplicate_bases.rs

@@ -59,7 +59,7 @@ pub(crate) fn duplicate_bases(checker: &mut Checker, name: &str, arguments: Opti
 
     let mut seen: FxHashSet<&str> =
         FxHashSet::with_capacity_and_hasher(bases.len(), BuildHasherDefault::default());
-    for base in bases {
+    for base in bases.iter() {
         if let Expr::Name(ast::ExprName { id, .. }) = base {
             if !seen.insert(id) {
                 checker.diagnostics.push(Diagnostic::new(

crates/ruff_linter/src/rules/pylint/rules/literal_membership.rs

@@ -45,7 +45,7 @@ impl AlwaysFixableViolation for LiteralMembership {
 
 /// PLR6201
 pub(crate) fn literal_membership(checker: &mut Checker, compare: &ast::ExprCompare) {
-    let [op] = compare.ops.as_slice() else {
+    let [op] = &*compare.ops else {
         return;
     };
 
@@ -53,7 +53,7 @@ pub(crate) fn literal_membership(checker: &mut Checker, compare: &ast::ExprCompa
         return;
     }
 
-    let [right] = compare.comparators.as_slice() else {
+    let [right] = &*compare.comparators else {
         return;
     };
 

crates/ruff_linter/src/rules/pylint/rules/nested_min_max.rs

@@ -106,7 +106,7 @@ fn collect_nested_args(min_max: MinMax, args: &[Expr], semantic: &SemanticModel)
                 range: _,
             }) = arg
             {
-                if let [arg] = args.as_slice() {
+                if let [arg] = &**args {
                     if arg.as_starred_expr().is_none() {
                         let new_arg = Expr::Starred(ast::ExprStarred {
                             value: Box::new(arg.clone()),
@@ -164,8 +164,8 @@ pub(crate) fn nested_min_max(
             let flattened_expr = Expr::Call(ast::ExprCall {
                 func: Box::new(func.clone()),
                 arguments: Arguments {
-                    args: collect_nested_args(min_max, args, checker.semantic()),
-                    keywords: keywords.to_owned(),
+                    args: collect_nested_args(min_max, args, checker.semantic()).into_boxed_slice(),
+                    keywords: Box::from(keywords),
                     range: TextRange::default(),
                 },
                 range: TextRange::default(),

crates/ruff_linter/src/rules/pylint/rules/repeated_equality_comparison.rs

@@ -96,7 +96,7 @@ pub(crate) fn repeated_equality_comparison(checker: &mut Checker, bool_op: &ast:
         };
 
         // Enforced via `is_allowed_value`.
-        let [right] = comparators.as_slice() else {
+        let [right] = &**comparators else {
             return;
         };
 
@@ -136,14 +136,14 @@ pub(crate) fn repeated_equality_comparison(checker: &mut Checker, bool_op: &ast:
                 checker.generator().expr(&Expr::Compare(ast::ExprCompare {
                     left: Box::new(value.as_expr().clone()),
                     ops: match bool_op.op {
-                        BoolOp::Or => vec![CmpOp::In],
-                        BoolOp::And => vec![CmpOp::NotIn],
+                        BoolOp::Or => Box::from([CmpOp::In]),
+                        BoolOp::And => Box::from([CmpOp::NotIn]),
                     },
-                    comparators: vec![Expr::Tuple(ast::ExprTuple {
+                    comparators: Box::from([Expr::Tuple(ast::ExprTuple {
                         elts: comparators.iter().copied().cloned().collect(),
                         range: TextRange::default(),
                         ctx: ExprContext::Load,
-                    })],
+                    })]),
                     range: bool_op.range(),
                 })),
                 bool_op.range(),
@@ -169,7 +169,7 @@ fn is_allowed_value(bool_op: BoolOp, value: &Expr) -> bool {
     };
 
     // Ignore, e.g., `foo == bar == baz`.
-    let [op] = ops.as_slice() else {
+    let [op] = &**ops else {
         return false;
     };
 
@@ -181,7 +181,7 @@ fn is_allowed_value(bool_op: BoolOp, value: &Expr) -> bool {
     }
 
     // Ignore self-comparisons, e.g., `foo == foo`.
-    let [right] = comparators.as_slice() else {
+    let [right] = &**comparators else {
         return false;
     };
     if ComparableExpr::from(left) == ComparableExpr::from(right) {

crates/ruff_linter/src/rules/pylint/rules/repeated_keyword_argument.rs

@@ -1,10 +1,11 @@
 use std::hash::BuildHasherDefault;
 
+use rustc_hash::FxHashSet;
+
 use ruff_diagnostics::{Diagnostic, Violation};
 use ruff_macros::{derive_message_formats, violation};
-use ruff_python_ast::{Arguments, Expr, ExprCall, ExprDict, ExprStringLiteral};
+use ruff_python_ast::{Expr, ExprCall, ExprDict, ExprStringLiteral};
 use ruff_text_size::Ranged;
-use rustc_hash::FxHashSet;
 
 use crate::checkers::ast::Checker;
 
@@ -37,15 +38,14 @@ impl Violation for RepeatedKeywordArgument {
 }
 
 pub(crate) fn repeated_keyword_argument(checker: &mut Checker, call: &ExprCall) {
-    let ExprCall {
-        arguments: Arguments { keywords, .. },
-        ..
-    } = call;
+    let ExprCall { arguments, .. } = call;
 
-    let mut seen =
-        FxHashSet::with_capacity_and_hasher(keywords.len(), BuildHasherDefault::default());
+    let mut seen = FxHashSet::with_capacity_and_hasher(
+        arguments.keywords.len(),
+        BuildHasherDefault::default(),
+    );
 
-    for keyword in keywords {
+    for keyword in arguments.keywords.iter() {
         if let Some(id) = &keyword.arg {
             // Ex) `func(a=1, a=2)`
             if !seen.insert(id.as_str()) {

crates/ruff_linter/src/rules/pylint/rules/unnecessary_dunder_call.rs

@@ -111,7 +111,7 @@ pub(crate) fn unnecessary_dunder_call(checker: &mut Checker, call: &ast::ExprCal
     let mut title: Option<String> = None;
 
     if let Some(dunder) = DunderReplacement::from_method(attr) {
-        match (call.arguments.args.as_slice(), dunder) {
+        match (&*call.arguments.args, dunder) {
             ([], DunderReplacement::Builtin(replacement, message)) => {
                 if !checker.semantic().is_builtin(replacement) {
                     return;

crates/ruff_linter/src/rules/pylint/rules/unspecified_encoding.rs

@@ -110,7 +110,7 @@ fn generate_keyword_fix(checker: &Checker, call: &ast::ExprCall) -> Fix {
                 .generator()
                 .expr(&Expr::StringLiteral(ast::ExprStringLiteral {
                     value: ast::StringLiteralValue::single(ast::StringLiteral {
-                        value: "locale".to_string(),
+                        value: "locale".to_string().into_boxed_str(),
                         unicode: false,
                         range: TextRange::default(),
                     }),