Bump version to 0.0.170

Use single newlines in .pyi import sorting (#1142 )
Remove 'consider' language from check messages (#1135 )
2022-12-08 11:36:24 -05:00 · 2022-12-08 11:34:41 -05:00 · 2022-12-07 20:10:36 -05:00 · 2022-12-07 19:10:16 -05:00 · 2022-12-07 19:10:03 -05:00 · 2022-12-07 19:08:18 -05:00
69 changed files with 1562 additions and 471 deletions
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
  - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.0.167
+    rev: v0.0.170
    hooks:
      - id: ruff

--- a/Cargo.lock
+++ b/Cargo.lock
@@ -724,7 +724,7 @@ checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"

 [[package]]
 name = "flake8-to-ruff"
-version = "0.0.167-dev.0"
+version = "0.0.170-dev.0"
 dependencies = [
 "anyhow",
 "clap 4.0.29",
@@ -1821,7 +1821,7 @@ dependencies = [

 [[package]]
 name = "ruff"
-version = "0.0.167"
+version = "0.0.170"
 dependencies = [
 "annotate-snippets 0.9.1",
 "anyhow",
@@ -1874,7 +1874,7 @@ dependencies = [

 [[package]]
 name = "ruff_dev"
-version = "0.0.167"
+version = "0.0.170"
 dependencies = [
 "anyhow",
 "clap 4.0.29",
@@ -1892,7 +1892,7 @@ dependencies = [

 [[package]]
 name = "ruff_macros"
-version = "0.0.161"
+version = "0.0.170"
 dependencies = [
 "proc-macro2",
 "quote",
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,7 +6,7 @@ members = [

 [package]
 name = "ruff"
-version = "0.0.167"
+version = "0.0.170"
 edition = "2021"
 rust-version = "1.65.0"

@@ -41,7 +41,7 @@ quick-junit = { version = "0.3.2" }
 rayon = { version = "1.5.3" }
 regex = { version = "1.6.0" }
 ropey = { version = "1.5.0", features = ["cr_lines", "simd"], default-features = false }
-ruff_macros = { version = "0.0.161", path = "ruff_macros" }
+ruff_macros = { version = "0.0.170", path = "ruff_macros" }
 rustc-hash = { version = "1.1.0" }
 rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "28f9f65ccc625f00835d84bbb5fba274dce5aa89" }
 rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "28f9f65ccc625f00835d84bbb5fba274dce5aa89" }
--- a/50
+++ b/50
@@ -388,6 +388,56 @@ are:
    SOFTWARE.
  """

+- flake8-import-conventions, licensed as follows:
+  """
+    MIT License
+
+    Copyright (c) 2021 João Palmeiro
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+  """
+
+- flake8-unused-arguments, licensed as follows:
+  """
+    MIT License
+
+    Copyright (c) 2019 Nathan Hoad
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+  """
+
 - isort, licensed as follows:
  """
    The MIT License (MIT)
--- a/README.md
+++ b/README.md
@@ -72,7 +72,7 @@ of [Conda](https://docs.conda.io/en/latest/):
   1. [Pyflakes (F)](#pyflakes-f)
   1. [pycodestyle (E, W)](#pycodestyle-e-w)
   1. [mccabe (C90)](#mccabe-c90)
-   1. [isort (I00)](#isort-i00)
+   1. [isort (I)](#isort-i)
   1. [pydocstyle (D)](#pydocstyle-d)
   1. [pyupgrade (UP)](#pyupgrade-up)
   1. [pep8-naming (N)](#pep8-naming-n)
@@ -89,7 +89,8 @@ of [Conda](https://docs.conda.io/en/latest/):
   1. [flake8-print (T20)](#flake8-print-t20)
   1. [flake8-quotes (Q)](#flake8-quotes-q)
   1. [flake8-return (RET)](#flake8-return-ret)
-   1. [flake8-tidy-imports (I25)](#flake8-tidy-imports-i25)
+   1. [flake8-tidy-imports (TID)](#flake8-tidy-imports-tid)
+   1. [flake8-unused-arguments (ARG)](#flake8-unused-arguments-arg)
   1. [eradicate (ERA)](#eradicate-era)
   1. [pygrep-hooks (PGH)](#pygrep-hooks-pgh)
   1. [Pylint (PLC, PLE, PLR, PLW)](#pylint-plc-ple-plr-plw)
@@ -146,7 +147,7 @@ Ruff also works with [pre-commit](https://pre-commit.com):
 ```yaml
 repos:
  - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.0.167
+    rev: v0.0.170
    hooks:
      - id: ruff
 ```
@@ -475,7 +476,7 @@ For more, see [mccabe](https://pypi.org/project/mccabe/0.7.0/) on PyPI.
 | ---- | ---- | ------- | --- |
 | C901 | FunctionIsTooComplex | `...` is too complex (10) |  |

-### isort (I00)
+### isort (I)

 For more, see [isort](https://pypi.org/project/isort/5.10.1/) on PyPI.

@@ -760,13 +761,25 @@ For more, see [flake8-return](https://pypi.org/project/flake8-return/1.2.0/) on
 | RET507 | SuperfluousElseContinue | Unnecessary `else` after `continue` statement |  |
 | RET508 | SuperfluousElseBreak | Unnecessary `else` after `break` statement |  |

-### flake8-tidy-imports (I25)
+### flake8-tidy-imports (TID)

 For more, see [flake8-tidy-imports](https://pypi.org/project/flake8-tidy-imports/4.8.0/) on PyPI.

 | Code | Name | Message | Fix |
 | ---- | ---- | ------- | --- |
-| I252 | BannedRelativeImport | Relative imports are banned |  |
+| TID252 | BannedRelativeImport | Relative imports are banned |  |
+
+### flake8-unused-arguments (ARG)
+
+For more, see [flake8-unused-arguments](https://pypi.org/project/flake8-unused-arguments/0.0.12/) on PyPI.
+
+| Code | Name | Message | Fix |
+| ---- | ---- | ------- | --- |
+| ARG001 | UnusedFunctionArgument | Unused function argument: `...` |  |
+| ARG002 | UnusedMethodArgument | Unused method argument: `...` |  |
+| ARG003 | UnusedClassMethodArgument | Unused class method argument: `...` |  |
+| ARG004 | UnusedStaticMethodArgument | Unused static method argument: `...` |  |
+| ARG005 | UnusedLambdaArgument | Unused lambda argument: `...` |  |

 ### eradicate (ERA)

@@ -795,9 +808,9 @@ For more, see [Pylint](https://pypi.org/project/pylint/2.15.7/) on PyPI.
 | PLC3002 | UnnecessaryDirectLambdaCall | Lambda expression called directly. Execute the expression inline instead. |  |
 | PLE1142 | AwaitOutsideAsync | `await` should be used within an async function |  |
 | PLR0206 | PropertyWithParameters | Cannot have defined parameters for properties |  |
-| PLR0402 | ConsiderUsingFromImport | Consider using `from ... import ...` |  |
-| PLR1701 | ConsiderMergingIsinstance | Consider merging these isinstance calls: `isinstance(..., (...))` |  |
-| PLR1722 | ConsiderUsingSysExit | Consider using `sys.exit()` | 🛠 |
+| PLR0402 | ConsiderUsingFromImport | Use `from ... import ...` in lieu of alias |  |
+| PLR1701 | ConsiderMergingIsinstance | Merge these isinstance calls: `isinstance(..., (...))` |  |
+| PLR1722 | UseSysExit | Use `sys.exit()` instead of `exit` | 🛠 |
 | PLW0120 | UselessElseOnLoop | Else clause on loop without a break statement, remove the else and de-indent all the code inside it |  |

 ### Ruff-specific rules (RUF)
@@ -967,6 +980,12 @@ natively, including:
 - [`pygrep-hooks`](https://github.com/pre-commit/pygrep-hooks) (1/10)
 - [`autoflake`](https://pypi.org/project/autoflake/) (1/7)

+Note that, in some cases, Ruff uses different error code prefixes than would be found in the
+originating Flake8 plugins. For example, Ruff uses `TID252` to represent the `I252` rule from
+`flake8-tidy-imports`. This helps minimize conflicts across plugins and allows any individual plugin
+to be toggled on or off with a single (e.g.) `--select TID`, as opposed to `--select I2` (to avoid
+conflicts with the `isort` rules, like `I001`).
+
 Beyond the rule set, Ruff suffers from the following limitations vis-à-vis Flake8:

 1. Ruff does not yet support a few Python 3.9 and 3.10 language features, including structural
@@ -1465,7 +1484,7 @@ fix = true

 A list of check code prefixes to consider autofix-able.

-**Default value**: `["A", "ANN", "B", "BLE", "C", "D", "E", "F", "FBT", "I", "M", "N", "Q", "RUF", "S", "T", "U", "W", "YTT"]`
+**Default value**: `["A", "ANN", "ARG", "B", "BLE", "C", "D", "E", "ERA", "F", "FBT", "I", "ICN", "N", "PGH", "PLC", "PLE", "PLR", "PLW", "Q", "RET", "RUF", "S", "T", "TID", "UP", "W", "YTT"]`

 **Type**: `Vec<CheckCodePrefix>`

@@ -1782,7 +1801,7 @@ The conventional aliases for imports. These aliases can be extended by the `exte

 **Default value**: `{"altair": "alt", "matplotlib.pyplot": "plt", "numpy": "np", "pandas": "pd", "seaborn": "sns"}`

-**Type**: `BTreeMap<String, String>`
+**Type**: `FxHashMap<String, String>`

 **Example usage**:

@@ -1804,7 +1823,7 @@ A mapping of modules to their conventional import aliases. These aliases will be

 **Default value**: `{}`

-**Type**: `BTreeMap<String, String>`
+**Type**: `FxHashMap<String, String>`

 **Example usage**:

--- a/flake8_to_ruff/Cargo.lock
+++ b/flake8_to_ruff/Cargo.lock
@@ -771,7 +771,7 @@ checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"

 [[package]]
 name = "flake8_to_ruff"
-version = "0.0.167"
+version = "0.0.170"
 dependencies = [
 "anyhow",
 "clap",
@@ -1975,7 +1975,7 @@ dependencies = [

 [[package]]
 name = "ruff"
-version = "0.0.167"
+version = "0.0.170"
 dependencies = [
 "anyhow",
 "bincode",
--- a/flake8_to_ruff/Cargo.toml
+++ b/flake8_to_ruff/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "flake8-to-ruff"
-version = "0.0.167-dev.0"
+version = "0.0.170-dev.0"
 edition = "2021"

 [lib]
--- a/resources/test/fixtures/flake8_tidy_imports/TID252.py
+++ b/resources/test/fixtures/flake8_tidy_imports/TID252.py
--- a/resources/test/fixtures/flake8_unused_arguments/ARG.py
+++ b/resources/test/fixtures/flake8_unused_arguments/ARG.py
@@ -0,0 +1,137 @@
+from abc import abstractmethod
+from typing_extensions import override
+
+
+###
+# Unused arguments on functions.
+###
+def f(self, x):
+    print("Hello, world!")
+
+
+def f(cls, x):
+    print("Hello, world!")
+
+
+def f(self, x):
+    ...
+
+
+def f(cls, x):
+    ...
+
+
+###
+# Unused arguments on lambdas.
+###
+lambda x: print("Hello, world!")
+
+
+class X:
+    ###
+    # Unused arguments.
+    ###
+    def f(self, x):
+        print("Hello, world!")
+
+    def f(self, /, x):
+        print("Hello, world!")
+
+    def f(cls, x):
+        print("Hello, world!")
+
+    @classmethod
+    def f(cls, x):
+        print("Hello, world!")
+
+    @staticmethod
+    def f(cls, x):
+        print("Hello, world!")
+
+    @staticmethod
+    def f(x):
+        print("Hello, world!")
+
+    ###
+    # Unused arguments attached to empty functions (OK).
+    ###
+    def f(self, x):
+        ...
+
+    def f(self, /, x):
+        ...
+
+    def f(cls, x):
+        ...
+
+    @classmethod
+    def f(cls, x):
+        ...
+
+    @staticmethod
+    def f(cls, x):
+        ...
+
+    @staticmethod
+    def f(x):
+        ...
+
+    ###
+    # Unused functions attached to abstract methods (OK).
+    ###
+    @abstractmethod
+    def f(self, x):
+        print("Hello, world!")
+
+    @abstractmethod
+    def f(self, /, x):
+        print("Hello, world!")
+
+    @abstractmethod
+    def f(cls, x):
+        print("Hello, world!")
+
+    @classmethod
+    @abstractmethod
+    def f(cls, x):
+        print("Hello, world!")
+
+    @staticmethod
+    @abstractmethod
+    def f(cls, x):
+        print("Hello, world!")
+
+    @staticmethod
+    @abstractmethod
+    def f(x):
+        print("Hello, world!")
+
+    ###
+    # Unused functions attached to overrides (OK).
+    ###
+    @override
+    def f(self, x):
+        print("Hello, world!")
+
+    @override
+    def f(self, /, x):
+        print("Hello, world!")
+
+    @override
+    def f(cls, x):
+        print("Hello, world!")
+
+    @classmethod
+    @override
+    def f(cls, x):
+        print("Hello, world!")
+
+    @staticmethod
+    @override
+    def f(cls, x):
+        print("Hello, world!")
+
+    @staticmethod
+    @override
+    def f(x):
+        print("Hello, world!")
--- a/resources/test/fixtures/isort/insert_empty_lines.pyi
+++ b/resources/test/fixtures/isort/insert_empty_lines.pyi
@@ -0,0 +1,41 @@
+import a
+import b
+x = 1
+import os
+import sys
+def f():
+    pass
+if True:
+    x = 1
+    import collections
+    import typing
+class X: pass
+y = 1
+import os
+import sys
+"""Docstring"""
+
+if True:
+    import os
+
+
+def f():
+    pass
+
+
+if True:
+    import os
+def f():
+    pass
+
+if True:
+    x = 1
+    import collections
+    import typing
+    class X: pass
+
+if True:
+    x = 1
+    import collections
+    import typing
+    def f(): pass
--- a/ruff_dev/Cargo.toml
+++ b/ruff_dev/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ruff_dev"
-version = "0.0.167"
+version = "0.0.170"
 edition = "2021"

 [dependencies]
--- a/ruff_dev/src/generate_check_code_prefix.rs
+++ b/ruff_dev/src/generate_check_code_prefix.rs
@@ -8,7 +8,7 @@ use anyhow::Result;
 use clap::Parser;
 use codegen::{Scope, Type, Variant};
 use itertools::Itertools;
-use ruff::checks::{CheckCode, REDIRECTS};
+use ruff::checks::{CheckCode, CODE_REDIRECTS, PREFIX_REDIRECTS};
 use strum::IntoEnumIterator;

 const FILE: &str = "src/checks_gen.rs";
@@ -39,34 +39,26 @@ pub fn main(cli: &Cli) -> Result<()> {
        }
    }

-    // Add any aliases (e.g., "U001" to "UP001").
-    for (alias, check_code) in REDIRECTS.iter() {
-        // Compute the length of the prefix and suffix for both codes.
-        let code_str: String = check_code.as_ref().to_string();
-        let code_prefix_len = code_str
-            .chars()
-            .take_while(|char| char.is_alphabetic())
-            .count();
-        let code_suffix_len = code_str.len() - code_prefix_len;
-        let alias_prefix_len = alias
-            .chars()
-            .take_while(|char| char.is_alphabetic())
-            .count();
-        let alias_suffix_len = alias.len() - alias_prefix_len;
-        assert_eq!(code_suffix_len, alias_suffix_len);
-        for i in 0..=code_suffix_len {
-            let source = code_str[..code_prefix_len + i].to_string();
-            let destination = alias[..alias_prefix_len + i].to_string();
-            if source != destination {
-                prefix_to_codes.insert(
-                    destination,
-                    prefix_to_codes
-                        .get(&source)
-                        .unwrap_or_else(|| panic!("Unknown CheckCode: {source:?}"))
-                        .clone(),
-                );
-            }
-        }
+    // Add any prefix aliases (e.g., "U" to "UP").
+    for (alias, source) in PREFIX_REDIRECTS.iter() {
+        prefix_to_codes.insert(
+            (*alias).to_string(),
+            prefix_to_codes
+                .get(&(*source).to_string())
+                .unwrap_or_else(|| panic!("Unknown CheckCode: {source:?}"))
+                .clone(),
+        );
+    }
+
+    // Add any check code aliases (e.g., "U001" to "UP001").
+    for (alias, check_code) in CODE_REDIRECTS.iter() {
+        prefix_to_codes.insert(
+            (*alias).to_string(),
+            prefix_to_codes
+                .get(&check_code.as_ref().to_string())
+                .unwrap_or_else(|| panic!("Unknown CheckCode: {alias:?}"))
+                .clone(),
+        );
    }

    let mut scope = Scope::new();
@@ -113,10 +105,10 @@ pub fn main(cli: &Cli) -> Result<()> {
        .line("#[allow(clippy::match_same_arms)]")
        .line("match self {");
    for (prefix, codes) in &prefix_to_codes {
-        if let Some(target) = REDIRECTS.get(&prefix.as_str()) {
+        if let Some(target) = CODE_REDIRECTS.get(&prefix.as_str()) {
            gen = gen.line(format!(
                "CheckCodePrefix::{prefix} => {{ eprintln!(\"{{}}{{}} {{}}\", \
-                 \"warning\".yellow().bold(), \":\".bold(), \"`{}` has been renamed to \
+                 \"warning\".yellow().bold(), \":\".bold(), \"`{}` has been remapped to \
                 `{}`\".bold()); \n vec![{}] }}",
                prefix,
                target.as_ref(),
@@ -125,6 +117,18 @@ pub fn main(cli: &Cli) -> Result<()> {
                    .map(|code| format!("CheckCode::{}", code.as_ref()))
                    .join(", ")
            ));
+        } else if let Some(target) = PREFIX_REDIRECTS.get(&prefix.as_str()) {
+            gen = gen.line(format!(
+                "CheckCodePrefix::{prefix} => {{ eprintln!(\"{{}}{{}} {{}}\", \
+                 \"warning\".yellow().bold(), \":\".bold(), \"`{}` has been remapped to \
+                 `{}`\".bold()); \n vec![{}] }}",
+                prefix,
+                target,
+                codes
+                    .iter()
+                    .map(|code| format!("CheckCode::{}", code.as_ref()))
+                    .join(", ")
+            ));
        } else {
            gen = gen.line(format!(
                "CheckCodePrefix::{prefix} => vec![{}],",
@@ -187,7 +191,9 @@ pub fn main(cli: &Cli) -> Result<()> {
    output.push_str("pub const CATEGORIES: &[CheckCodePrefix] = &[");
    output.push('\n');
    for prefix in prefix_to_codes.keys() {
-        if prefix.chars().all(char::is_alphabetic) {
+        if prefix.chars().all(char::is_alphabetic)
+            && !PREFIX_REDIRECTS.contains_key(&prefix.as_str())
+        {
            output.push_str(&format!("CheckCodePrefix::{prefix},"));
            output.push('\n');
        }
--- a/ruff_macros/Cargo.toml
+++ b/ruff_macros/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ruff_macros"
-version = "0.0.161"
+version = "0.0.170"
 edition = "2021"

 [lib]
--- a/src/ast/cast.rs
+++ b/src/ast/cast.rs
@@ -0,0 +1,9 @@
+use rustpython_ast::{Expr, Stmt, StmtKind};
+
+pub fn decorator_list(stmt: &Stmt) -> &Vec<Expr> {
+    match &stmt.node {
+        StmtKind::FunctionDef { decorator_list, .. }
+        | StmtKind::AsyncFunctionDef { decorator_list, .. } => decorator_list,
+        _ => panic!("Expected StmtKind::FunctionDef | StmtKind::AsyncFunctionDef"),
+    }
+}
--- a/src/ast/function_type.rs
+++ b/src/ast/function_type.rs
@@ -0,0 +1,65 @@
+use rustc_hash::{FxHashMap, FxHashSet};
+use rustpython_ast::Expr;
+
+use crate::ast::helpers::{
+    collect_call_paths, dealias_call_path, match_call_path, to_module_and_member,
+};
+use crate::ast::types::{Scope, ScopeKind};
+
+const CLASS_METHODS: [&str; 3] = ["__new__", "__init_subclass__", "__class_getitem__"];
+const METACLASS_BASES: [(&str, &str); 2] = [("", "type"), ("abc", "ABCMeta")];
+
+pub enum FunctionType {
+    Function,
+    Method,
+    ClassMethod,
+    StaticMethod,
+}
+
+/// Classify a function based on its scope, name, and decorators.
+pub fn classify(
+    scope: &Scope,
+    name: &str,
+    decorator_list: &[Expr],
+    from_imports: &FxHashMap<&str, FxHashSet<&str>>,
+    import_aliases: &FxHashMap<&str, &str>,
+    classmethod_decorators: &[String],
+    staticmethod_decorators: &[String],
+) -> FunctionType {
+    let ScopeKind::Class(scope) = &scope.kind else {
+        return FunctionType::Function;
+    };
+    // Special-case class method, like `__new__`.
+    if CLASS_METHODS.contains(&name)
+        || scope.bases.iter().any(|expr| {
+            // The class itself extends a known metaclass, so all methods are class methods.
+            let call_path = dealias_call_path(collect_call_paths(expr), import_aliases);
+            METACLASS_BASES
+                .iter()
+                .any(|(module, member)| match_call_path(&call_path, module, member, from_imports))
+        })
+        || decorator_list.iter().any(|expr| {
+            // The method is decorated with a class method decorator (like `@classmethod`).
+            let call_path = dealias_call_path(collect_call_paths(expr), import_aliases);
+            classmethod_decorators.iter().any(|decorator| {
+                let (module, member) = to_module_and_member(decorator);
+                match_call_path(&call_path, module, member, from_imports)
+            })
+        })
+    {
+        FunctionType::ClassMethod
+    } else if decorator_list.iter().any(|expr| {
+        // The method is decorated with a static method decorator (like
+        // `@staticmethod`).
+        let call_path = dealias_call_path(collect_call_paths(expr), import_aliases);
+        staticmethod_decorators.iter().any(|decorator| {
+            let (module, member) = to_module_and_member(decorator);
+            match_call_path(&call_path, module, member, from_imports)
+        })
+    }) {
+        FunctionType::StaticMethod
+    } else {
+        // It's an instance method.
+        FunctionType::Method
+    }
+}
--- a/src/ast/mod.rs
+++ b/src/ast/mod.rs
@@ -1,3 +1,5 @@
+pub mod cast;
+pub mod function_type;
 pub mod helpers;
 pub mod operations;
 pub mod relocate;
--- a/src/ast/types.rs
+++ b/src/ast/types.rs
@@ -1,7 +1,7 @@
 use std::sync::atomic::{AtomicUsize, Ordering};

 use rustc_hash::FxHashMap;
-use rustpython_ast::{Expr, Keyword, Stmt};
+use rustpython_ast::{Arguments, Expr, Keyword, Stmt};
 use rustpython_parser::ast::{Located, Location};

 fn id() -> usize {
@@ -30,35 +30,49 @@ impl Range {
    }
 }

-#[derive(Clone, Debug)]
-pub struct FunctionScope {
+#[derive(Debug)]
+pub struct FunctionDef<'a> {
+    pub name: &'a str,
+    pub args: &'a Arguments,
+    pub body: &'a [Stmt],
+    pub decorator_list: &'a [Expr],
+    // pub returns: Option<&'a Expr>,
+    // pub type_comment: Option<&'a str>,
+    // TODO(charlie): Create AsyncFunctionDef to mirror the AST.
    pub async_: bool,
-    pub uses_locals: bool,
 }

-#[derive(Clone, Debug)]
-pub struct ClassScope<'a> {
+#[derive(Debug)]
+pub struct ClassDef<'a> {
    pub name: &'a str,
    pub bases: &'a [Expr],
    pub keywords: &'a [Keyword],
+    // pub body: &'a [Stmt],
    pub decorator_list: &'a [Expr],
 }

-#[derive(Clone, Debug)]
+#[derive(Debug)]
+pub struct Lambda<'a> {
+    pub args: &'a Arguments,
+    pub body: &'a Expr,
+}
+
+#[derive(Debug)]
 pub enum ScopeKind<'a> {
-    Class(ClassScope<'a>),
-    Function(FunctionScope),
+    Class(ClassDef<'a>),
+    Function(FunctionDef<'a>),
    Generator,
    Module,
    Arg,
-    Lambda,
+    Lambda(Lambda<'a>),
 }

-#[derive(Clone, Debug)]
+#[derive(Debug)]
 pub struct Scope<'a> {
    pub id: usize,
    pub kind: ScopeKind<'a>,
    pub import_starred: bool,
+    pub uses_locals: bool,
    pub values: FxHashMap<&'a str, Binding>,
 }

@@ -68,6 +82,7 @@ impl<'a> Scope<'a> {
            id: id(),
            kind,
            import_starred: false,
+            uses_locals: false,
            values: FxHashMap::default(),
        }
    }
--- a/src/check_ast.rs
+++ b/src/check_ast.rs
@@ -17,7 +17,8 @@ use crate::ast::helpers::{
 use crate::ast::operations::extract_all_names;
 use crate::ast::relocate::relocate_expr;
 use crate::ast::types::{
-    Binding, BindingContext, BindingKind, ClassScope, FunctionScope, Node, Range, Scope, ScopeKind,
+    Binding, BindingContext, BindingKind, ClassDef, FunctionDef, Lambda, Node, Range, Scope,
+    ScopeKind,
 };
 use crate::ast::visitor::{walk_excepthandler, Visitor};
 use crate::ast::{helpers, operations, visitor};
@@ -35,8 +36,9 @@ use crate::visibility::{module_visibility, transition_scope, Modifier, Visibilit
 use crate::{
    docstrings, flake8_2020, flake8_annotations, flake8_bandit, flake8_blind_except,
    flake8_boolean_trap, flake8_bugbear, flake8_builtins, flake8_comprehensions, flake8_debugger,
-    flake8_import_conventions, flake8_print, flake8_return, flake8_tidy_imports, mccabe,
-    pep8_naming, pycodestyle, pydocstyle, pyflakes, pygrep_hooks, pylint, pyupgrade,
+    flake8_import_conventions, flake8_print, flake8_return, flake8_tidy_imports,
+    flake8_unused_arguments, mccabe, pep8_naming, pycodestyle, pydocstyle, pyflakes, pygrep_hooks,
+    pylint, pyupgrade,
 };

 const GLOBAL_SCOPE_INDEX: usize = 0;
@@ -71,7 +73,7 @@ pub struct Checker<'a> {
    deferred_type_definitions: Vec<(&'a Expr, bool, DeferralContext)>,
    deferred_functions: Vec<(&'a Stmt, DeferralContext, VisibleScope)>,
    deferred_lambdas: Vec<(&'a Expr, DeferralContext)>,
-    deferred_assignments: Vec<usize>,
+    deferred_assignments: Vec<(usize, DeferralContext)>,
    // Internal, derivative state.
    visible_scope: VisibleScope,
    in_f_string: Option<Range>,
@@ -580,7 +582,7 @@ where
                for expr in decorator_list {
                    self.visit_expr(expr);
                }
-                self.push_scope(Scope::new(ScopeKind::Class(ClassScope {
+                self.push_scope(Scope::new(ScopeKind::Class(ClassDef {
                    name,
                    bases,
                    keywords,
@@ -671,7 +673,7 @@ where
                        pylint::plugins::useless_import_alias(self, alias);
                    }
                    if self.settings.enabled.contains(&CheckCode::PLR0402) {
-                        pylint::plugins::consider_using_from_import(self, alias);
+                        pylint::plugins::use_from_import(self, alias);
                    }

                    if let Some(asname) = &alias.node.asname {
@@ -902,7 +904,7 @@ where
                        );
                    }

-                    if self.settings.enabled.contains(&CheckCode::I252) {
+                    if self.settings.enabled.contains(&CheckCode::TID252) {
                        if let Some(check) = flake8_tidy_imports::checks::banned_relative_import(
                            stmt,
                            level.as_ref(),
@@ -1406,20 +1408,18 @@ where
                                    }
                                    Ok(summary) => {
                                        if self.settings.enabled.contains(&CheckCode::F522) {
-                                            if let Some(check) =
-                                                pyflakes::checks::string_dot_format_extra_named_arguments(
-                                                    &summary, keywords, location,
-                                                )
+                                            if let Some(check) = pyflakes::checks::string_dot_format_extra_named_arguments(
+                                                &summary, keywords, location,
+                                            )
                                            {
                                                self.add_check(check);
                                            }
                                        }

                                        if self.settings.enabled.contains(&CheckCode::F523) {
-                                            if let Some(check) =
-                                                pyflakes::checks::string_dot_format_extra_positional_arguments(
-                                                    &summary, args, location,
-                                                )
+                                            if let Some(check) = pyflakes::checks::string_dot_format_extra_positional_arguments(
+                                                &summary, args, location,
+                                            )
                                            {
                                                self.add_check(check);
                                            }
@@ -1486,7 +1486,7 @@ where
                        .scope_stack
                        .iter()
                        .rev()
-                        .any(|index| matches!(self.scopes[*index].kind, ScopeKind::Lambda))
+                        .any(|index| matches!(self.scopes[*index].kind, ScopeKind::Lambda(..)))
                    {
                        flake8_bugbear::plugins::setattr_with_constant(self, expr, func, args);
                    }
@@ -1747,9 +1747,7 @@ where
                    if id == "locals" && matches!(ctx, ExprContext::Load) {
                        let scope = &mut self.scopes
                            [*(self.scope_stack.last().expect("No current scope found"))];
-                        if let ScopeKind::Function(inner) = &mut scope.kind {
-                            inner.uses_locals = true;
-                        }
+                        scope.uses_locals = true;
                    }
                }

@@ -1775,7 +1773,7 @@ where
                    pylint::plugins::unnecessary_direct_lambda_call(self, expr, func);
                }
                if self.settings.enabled.contains(&CheckCode::PLR1722) {
-                    pylint::plugins::consider_using_sys_exit(self, func);
+                    pylint::plugins::use_sys_exit(self, func);
                }
            }
            ExprKind::Dict { keys, .. } => {
@@ -2070,7 +2068,7 @@ where
                    }
                }
            }
-            ExprKind::Lambda { args, .. } => {
+            ExprKind::Lambda { args, body, .. } => {
                // Visit the arguments, but avoid the body, which will be deferred.
                for arg in &args.posonlyargs {
                    if let Some(expr) = &arg.node.annotation {
@@ -2103,7 +2101,7 @@ where
                for expr in &args.defaults {
                    self.visit_expr(expr);
                }
-                self.push_scope(Scope::new(ScopeKind::Lambda));
+                self.push_scope(Scope::new(ScopeKind::Lambda(Lambda { args, body })));
            }
            ExprKind::ListComp { elt, generators } | ExprKind::SetComp { elt, generators } => {
                if self.settings.enabled.contains(&CheckCode::C416) {
@@ -2131,7 +2129,7 @@ where
            }
            ExprKind::BoolOp { op, values } => {
                if self.settings.enabled.contains(&CheckCode::PLR1701) {
-                    pylint::plugins::consider_merging_isinstance(self, expr, op, values);
+                    pylint::plugins::merge_isinstance(self, expr, op, values);
                }
            }
            _ => {}
@@ -2958,27 +2956,44 @@ impl<'a> Checker<'a> {

    fn check_deferred_functions(&mut self) {
        while let Some((stmt, (scopes, parents), visibility)) = self.deferred_functions.pop() {
-            self.scope_stack = scopes;
-            self.parent_stack = parents;
+            self.scope_stack = scopes.clone();
+            self.parent_stack = parents.clone();
            self.visible_scope = visibility;
-            self.push_scope(Scope::new(ScopeKind::Function(FunctionScope {
-                async_: matches!(stmt.node, StmtKind::AsyncFunctionDef { .. }),
-                uses_locals: false,
-            })));

            match &stmt.node {
-                StmtKind::FunctionDef { body, args, .. }
-                | StmtKind::AsyncFunctionDef { body, args, .. } => {
+                StmtKind::FunctionDef {
+                    name,
+                    body,
+                    args,
+                    decorator_list,
+                    ..
+                }
+                | StmtKind::AsyncFunctionDef {
+                    name,
+                    body,
+                    args,
+                    decorator_list,
+                    ..
+                } => {
+                    self.push_scope(Scope::new(ScopeKind::Function(FunctionDef {
+                        name,
+                        body,
+                        args,
+                        decorator_list,
+                        async_: matches!(stmt.node, StmtKind::AsyncFunctionDef { .. }),
+                    })));
                    self.visit_arguments(args);
                    for stmt in body {
                        self.visit_stmt(stmt);
                    }
                }
-                _ => {}
+                _ => unreachable!("Expected StmtKind::FunctionDef | StmtKind::AsyncFunctionDef"),
            }

-            self.deferred_assignments
-                .push(*self.scope_stack.last().expect("No current scope found"));
+            self.deferred_assignments.push((
+                *self.scope_stack.last().expect("No current scope found"),
+                (scopes, parents),
+            ));

            self.pop_scope();
        }
@@ -2986,25 +3001,29 @@ impl<'a> Checker<'a> {

    fn check_deferred_lambdas(&mut self) {
        while let Some((expr, (scopes, parents))) = self.deferred_lambdas.pop() {
-            self.scope_stack = scopes;
-            self.parent_stack = parents;
-            self.push_scope(Scope::new(ScopeKind::Lambda));
+            self.scope_stack = scopes.clone();
+            self.parent_stack = parents.clone();

            if let ExprKind::Lambda { args, body } = &expr.node {
+                self.push_scope(Scope::new(ScopeKind::Lambda(Lambda { args, body })));
                self.visit_arguments(args);
                self.visit_expr(body);
+            } else {
+                unreachable!("Expected ExprKind::Lambda");
            }

-            self.deferred_assignments
-                .push(*self.scope_stack.last().expect("No current scope found"));
+            self.deferred_assignments.push((
+                *self.scope_stack.last().expect("No current scope found"),
+                (scopes, parents),
+            ));

            self.pop_scope();
        }
    }

    fn check_deferred_assignments(&mut self) {
-        if self.settings.enabled.contains(&CheckCode::F841) {
-            while let Some(index) = self.deferred_assignments.pop() {
+        while let Some((index, (scopes, _parents))) = self.deferred_assignments.pop() {
+            if self.settings.enabled.contains(&CheckCode::F841) {
                self.add_checks(
                    pyflakes::checks::unused_variables(
                        &self.scopes[index],
@@ -3013,6 +3032,23 @@ impl<'a> Checker<'a> {
                    .into_iter(),
                );
            }
+            if self.settings.enabled.contains(&CheckCode::ARG001)
+                || self.settings.enabled.contains(&CheckCode::ARG002)
+                || self.settings.enabled.contains(&CheckCode::ARG003)
+                || self.settings.enabled.contains(&CheckCode::ARG004)
+                || self.settings.enabled.contains(&CheckCode::ARG005)
+            {
+                self.add_checks(
+                    flake8_unused_arguments::plugins::unused_arguments(
+                        self,
+                        &self.scopes[*scopes
+                            .last()
+                            .expect("Expected parent scope above function scope")],
+                        &self.scopes[index],
+                    )
+                    .into_iter(),
+                );
+            }
        }
    }

@@ -3092,7 +3128,7 @@ impl<'a> Checker<'a> {
                for (name, binding) in &scope.values {
                    let (BindingKind::Importation(_, full_name, context)
                    | BindingKind::SubmoduleImportation(_, full_name, context)
-                    | BindingKind::FromImportation(_, full_name, context)) = &binding.kind else { continue };
+                    | BindingKind::FromImportation(_, full_name, context)) = &binding.kind else { continue; };

                    // Skip used exports from `__all__`
                    if binding.used.is_some()
--- a/src/check_imports.rs
+++ b/src/check_imports.rs
@@ -1,5 +1,7 @@
 //! Lint rules based on import analysis.

+use std::path::Path;
+
 use rustpython_parser::ast::Suite;

 use crate::ast::visitor::Visitor;
@@ -33,8 +35,9 @@ pub fn check_imports(
    directives: &IsortDirectives,
    settings: &Settings,
    autofix: bool,
+    path: &Path,
 ) -> Vec<Check> {
-    let mut tracker = ImportTracker::new(directives);
+    let mut tracker = ImportTracker::new(directives, path);
    for stmt in python_ast {
        tracker.visit_stmt(stmt);
    }
--- a/src/check_lines.rs
+++ b/src/check_lines.rs
@@ -7,7 +7,7 @@ use rustpython_parser::ast::Location;

 use crate::ast::types::Range;
 use crate::autofix::Fix;
-use crate::checks::{Check, CheckCode, CheckKind, REDIRECTS};
+use crate::checks::{Check, CheckCode, CheckKind, CODE_REDIRECTS};
 use crate::noqa;
 use crate::noqa::{is_file_exempt, Directive};
 use crate::settings::Settings;
@@ -209,7 +209,7 @@ pub fn check_lines(
                    let mut invalid_codes = vec![];
                    let mut valid_codes = vec![];
                    for code in codes {
-                        let code = REDIRECTS.get(code).map_or(code, AsRef::as_ref);
+                        let code = CODE_REDIRECTS.get(code).map_or(code, AsRef::as_ref);
                        if matches.contains(&code) || settings.external.contains(code) {
                            valid_codes.push(code.to_string());
                        } else {
--- a/src/checks.rs
+++ b/src/checks.rs
@@ -160,7 +160,7 @@ pub enum CheckCode {
    // mccabe
    C901,
    // flake8-tidy-imports
-    I252,
+    TID252,
    // flake8-return
    RET501,
    RET502,
@@ -292,6 +292,12 @@ pub enum CheckCode {
    FBT001,
    FBT002,
    FBT003,
+    // flake8-unused-arguments
+    ARG001,
+    ARG002,
+    ARG003,
+    ARG004,
+    ARG005,
    // flake8-import-conventions
    ICN001,
    // Ruff
@@ -326,6 +332,7 @@ pub enum CheckCategory {
    Flake8Quotes,
    Flake8Return,
    Flake8TidyImports,
+    Flake8UnusedArguments,
    Eradicate,
    PygrepHooks,
    Pylint,
@@ -364,6 +371,7 @@ impl CheckCategory {
            CheckCategory::Flake8Quotes => "flake8-quotes",
            CheckCategory::Flake8Return => "flake8-return",
            CheckCategory::Flake8TidyImports => "flake8-tidy-imports",
+            CheckCategory::Flake8UnusedArguments => "flake8-unused-arguments",
            CheckCategory::Isort => "isort",
            CheckCategory::McCabe => "mccabe",
            CheckCategory::PEP8Naming => "pep8-naming",
@@ -392,8 +400,9 @@ impl CheckCategory {
            CheckCategory::Flake8Print => vec![CheckCodePrefix::T20],
            CheckCategory::Flake8Quotes => vec![CheckCodePrefix::Q],
            CheckCategory::Flake8Return => vec![CheckCodePrefix::RET],
-            CheckCategory::Flake8TidyImports => vec![CheckCodePrefix::I25],
-            CheckCategory::Isort => vec![CheckCodePrefix::I00],
+            CheckCategory::Flake8TidyImports => vec![CheckCodePrefix::TID],
+            CheckCategory::Flake8UnusedArguments => vec![CheckCodePrefix::ARG],
+            CheckCategory::Isort => vec![CheckCodePrefix::I],
            CheckCategory::McCabe => vec![CheckCodePrefix::C90],
            CheckCategory::PEP8Naming => vec![CheckCodePrefix::N],
            CheckCategory::Pycodestyle => vec![CheckCodePrefix::E, CheckCodePrefix::W],
@@ -470,6 +479,10 @@ impl CheckCategory {
                "https://pypi.org/project/flake8-tidy-imports/4.8.0/",
                &Platform::PyPI,
            )),
+            CheckCategory::Flake8UnusedArguments => Some((
+                "https://pypi.org/project/flake8-unused-arguments/0.0.12/",
+                &Platform::PyPI,
+            )),
            CheckCategory::Isort => {
                Some(("https://pypi.org/project/isort/5.10.1/", &Platform::PyPI))
            }
@@ -625,7 +638,7 @@ pub enum CheckKind {
    ConsiderUsingFromImport(String, String),
    AwaitOutsideAsync,
    UselessElseOnLoop,
-    ConsiderUsingSysExit,
+    UseSysExit(String),
    // flake8-builtins
    BuiltinVariableShadowing(String),
    BuiltinArgumentShadowing(String),
@@ -817,6 +830,12 @@ pub enum CheckKind {
    BooleanPositionalValueInFunctionCall,
    // pygrep-hooks
    NoEval,
+    // flake8-unused-arguments
+    UnusedFunctionArgument(String),
+    UnusedMethodArgument(String),
+    UnusedClassMethodArgument(String),
+    UnusedStaticMethodArgument(String),
+    UnusedLambdaArgument(String),
    // flake8-import-conventions
    ImportAliasIsNotConventional(String, String),
    // Ruff
@@ -931,7 +950,7 @@ impl CheckCode {
            CheckCode::PLR1701 => {
                CheckKind::ConsiderMergingIsinstance("...".to_string(), vec!["...".to_string()])
            }
-            CheckCode::PLR1722 => CheckKind::ConsiderUsingSysExit,
+            CheckCode::PLR1722 => CheckKind::UseSysExit("exit".to_string()),
            CheckCode::PLW0120 => CheckKind::UselessElseOnLoop,
            // flake8-builtins
            CheckCode::A001 => CheckKind::BuiltinVariableShadowing("...".to_string()),
@@ -1003,7 +1022,7 @@ impl CheckCode {
            // flake8-debugger
            CheckCode::T100 => CheckKind::Debugger(DebuggerUsingType::Import("...".to_string())),
            // flake8-tidy-imports
-            CheckCode::I252 => CheckKind::BannedRelativeImport(Strictness::All),
+            CheckCode::TID252 => CheckKind::BannedRelativeImport(Strictness::All),
            // flake8-return
            CheckCode::RET501 => CheckKind::UnnecessaryReturnNone,
            CheckCode::RET502 => CheckKind::ImplicitReturnValue,
@@ -1159,6 +1178,12 @@ impl CheckCode {
            CheckCode::FBT003 => CheckKind::BooleanPositionalValueInFunctionCall,
            // pygrep-hooks
            CheckCode::PGH001 => CheckKind::NoEval,
+            // flake8-unused-arguments
+            CheckCode::ARG001 => CheckKind::UnusedFunctionArgument("...".to_string()),
+            CheckCode::ARG002 => CheckKind::UnusedMethodArgument("...".to_string()),
+            CheckCode::ARG003 => CheckKind::UnusedClassMethodArgument("...".to_string()),
+            CheckCode::ARG004 => CheckKind::UnusedStaticMethodArgument("...".to_string()),
+            CheckCode::ARG005 => CheckKind::UnusedLambdaArgument("...".to_string()),
            // flake8-import-conventions
            CheckCode::ICN001 => {
                CheckKind::ImportAliasIsNotConventional("...".to_string(), "...".to_string())
@@ -1188,6 +1213,11 @@ impl CheckCode {
            CheckCode::ANN205 => CheckCategory::Flake8Annotations,
            CheckCode::ANN206 => CheckCategory::Flake8Annotations,
            CheckCode::ANN401 => CheckCategory::Flake8Annotations,
+            CheckCode::ARG001 => CheckCategory::Flake8UnusedArguments,
+            CheckCode::ARG002 => CheckCategory::Flake8UnusedArguments,
+            CheckCode::ARG003 => CheckCategory::Flake8UnusedArguments,
+            CheckCode::ARG004 => CheckCategory::Flake8UnusedArguments,
+            CheckCode::ARG005 => CheckCategory::Flake8UnusedArguments,
            CheckCode::B002 => CheckCategory::Flake8Bugbear,
            CheckCode::B003 => CheckCategory::Flake8Bugbear,
            CheckCode::B004 => CheckCategory::Flake8Bugbear,
@@ -1339,8 +1369,8 @@ impl CheckCode {
            CheckCode::FBT002 => CheckCategory::Flake8BooleanTrap,
            CheckCode::FBT003 => CheckCategory::Flake8BooleanTrap,
            CheckCode::I001 => CheckCategory::Isort,
+            CheckCode::TID252 => CheckCategory::Flake8TidyImports,
            CheckCode::ICN001 => CheckCategory::Flake8ImportConventions,
-            CheckCode::I252 => CheckCategory::Flake8TidyImports,
            CheckCode::N801 => CheckCategory::PEP8Naming,
            CheckCode::N802 => CheckCategory::PEP8Naming,
            CheckCode::N803 => CheckCategory::PEP8Naming,
@@ -1493,7 +1523,7 @@ impl CheckKind {
            CheckKind::ConsiderMergingIsinstance(..) => &CheckCode::PLR1701,
            CheckKind::PropertyWithParameters => &CheckCode::PLR0206,
            CheckKind::ConsiderUsingFromImport(..) => &CheckCode::PLR0402,
-            CheckKind::ConsiderUsingSysExit => &CheckCode::PLR1722,
+            CheckKind::UseSysExit(_) => &CheckCode::PLR1722,
            CheckKind::UselessElseOnLoop => &CheckCode::PLW0120,
            // flake8-builtins
            CheckKind::BuiltinVariableShadowing(_) => &CheckCode::A001,
@@ -1550,7 +1580,7 @@ impl CheckKind {
            // flake8-debugger
            CheckKind::Debugger(_) => &CheckCode::T100,
            // flake8-tidy-imports
-            CheckKind::BannedRelativeImport(_) => &CheckCode::I252,
+            CheckKind::BannedRelativeImport(_) => &CheckCode::TID252,
            // flake8-return
            CheckKind::UnnecessaryReturnNone => &CheckCode::RET501,
            CheckKind::ImplicitReturnValue => &CheckCode::RET502,
@@ -1686,6 +1716,12 @@ impl CheckKind {
            CheckKind::BooleanPositionalValueInFunctionCall => &CheckCode::FBT003,
            // pygrep-hooks
            CheckKind::NoEval => &CheckCode::PGH001,
+            // flake8-unused-arguments
+            CheckKind::UnusedFunctionArgument(..) => &CheckCode::ARG001,
+            CheckKind::UnusedMethodArgument(..) => &CheckCode::ARG002,
+            CheckKind::UnusedClassMethodArgument(..) => &CheckCode::ARG003,
+            CheckKind::UnusedStaticMethodArgument(..) => &CheckCode::ARG004,
+            CheckKind::UnusedLambdaArgument(..) => &CheckCode::ARG005,
            // flake8-import-conventions
            CheckKind::ImportAliasIsNotConventional(..) => &CheckCode::ICN001,
            // Ruff
@@ -1885,7 +1921,7 @@ impl CheckKind {
            }
            CheckKind::ConsiderMergingIsinstance(obj, types) => {
                let types = types.join(", ");
-                format!("Consider merging these isinstance calls: `isinstance({obj}, ({types}))`")
+                format!("Merge these isinstance calls: `isinstance({obj}, ({types}))`")
            }
            CheckKind::MisplacedComparisonConstant(comprison) => {
                format!("Comparison should be {comprison}")
@@ -1897,7 +1933,7 @@ impl CheckKind {
                "Cannot have defined parameters for properties".to_string()
            }
            CheckKind::ConsiderUsingFromImport(module, name) => {
-                format!("Consider using `from {module} import {name}`")
+                format!("Use `from {module} import {name}` in lieu of alias")
            }
            CheckKind::AwaitOutsideAsync => {
                "`await` should be used within an async function".to_string()
@@ -1905,7 +1941,7 @@ impl CheckKind {
            CheckKind::UselessElseOnLoop => "Else clause on loop without a break statement, \
                                             remove the else and de-indent all the code inside it"
                .to_string(),
-            CheckKind::ConsiderUsingSysExit => "Consider using `sys.exit()`".to_string(),
+            CheckKind::UseSysExit(name) => format!("Use `sys.exit()` instead of `{name}`"),
            // flake8-builtins
            CheckKind::BuiltinVariableShadowing(name) => {
                format!("Variable `{name}` is shadowing a python builtin")
@@ -2477,6 +2513,18 @@ impl CheckKind {
            }
            // pygrep-hooks
            CheckKind::NoEval => "No builtin `eval()` allowed".to_string(),
+            // flake8-unused-arguments
+            CheckKind::UnusedFunctionArgument(name) => {
+                format!("Unused function argument: `{name}`")
+            }
+            CheckKind::UnusedMethodArgument(name) => format!("Unused method argument: `{name}`"),
+            CheckKind::UnusedClassMethodArgument(name) => {
+                format!("Unused class method argument: `{name}`")
+            }
+            CheckKind::UnusedStaticMethodArgument(name) => {
+                format!("Unused static method argument: `{name}`")
+            }
+            CheckKind::UnusedLambdaArgument(name) => format!("Unused lambda argument: `{name}`"),
            // flake8-import-conventions
            CheckKind::ImportAliasIsNotConventional(name, asname) => {
                format!("`{name}` should be imported as `{asname}`")
@@ -2551,7 +2599,6 @@ impl CheckKind {
                | CheckKind::BlankLineBeforeSection(..)
                | CheckKind::CapitalizeSectionName(..)
                | CheckKind::CommentedOutCode
-                | CheckKind::ConsiderUsingSysExit
                | CheckKind::ConvertNamedTupleFunctionalToClass(..)
                | CheckKind::ConvertTypedDictFunctionalToClass(..)
                | CheckKind::DashedUnderlineAfterSection(..)
@@ -2617,6 +2664,7 @@ impl CheckKind {
                | CheckKind::UnusedNOQA(..)
                | CheckKind::UsePEP585Annotation(..)
                | CheckKind::UsePEP604Annotation
+                | CheckKind::UseSysExit(..)
                | CheckKind::UselessImportAlias
                | CheckKind::UselessMetaclassType
                | CheckKind::UselessObjectInheritance(..)
@@ -2648,7 +2696,7 @@ impl Check {
 }

 /// A hash map from deprecated to latest `CheckCode`.
-pub static REDIRECTS: Lazy<FxHashMap<&'static str, CheckCode>> = Lazy::new(|| {
+pub static CODE_REDIRECTS: Lazy<FxHashMap<&'static str, CheckCode>> = Lazy::new(|| {
    FxHashMap::from_iter([
        // TODO(charlie): Remove by 2023-01-01.
        ("U001", CheckCode::UP001),
@@ -2665,6 +2713,25 @@ pub static REDIRECTS: Lazy<FxHashMap<&'static str, CheckCode>> = Lazy::new(|| {
        ("U013", CheckCode::UP013),
        ("U014", CheckCode::UP014),
        ("U015", CheckCode::UP015),
+        // TODO(charlie): Remove by 2023-02-01.
+        ("I252", CheckCode::TID252),
+        ("M001", CheckCode::RUF100),
+    ])
+});
+
+/// A hash map from deprecated `CheckCodePrefix` to latest `CheckCodePrefix`.
+pub static PREFIX_REDIRECTS: Lazy<FxHashMap<&'static str, &'static str>> = Lazy::new(|| {
+    FxHashMap::from_iter([
+        // TODO(charlie): Remove by 2023-01-01.
+        ("U", "UP"),
+        ("U0", "UP0"),
+        ("U00", "UP00"),
+        ("U01", "UP01"),
+        // TODO(charlie): Remove by 2023-02-01.
+        ("I2", "TID2"),
+        ("I25", "TID25"),
+        ("M", "RUF100"),
+        ("M0", "RUF100"),
    ])
 });

--- a/src/checks_gen.rs
+++ b/src/checks_gen.rs
@@ -36,6 +36,14 @@ pub enum CheckCodePrefix {
    ANN4,
    ANN40,
    ANN401,
+    ARG,
+    ARG0,
+    ARG00,
+    ARG001,
+    ARG002,
+    ARG003,
+    ARG004,
+    ARG005,
    B,
    B0,
    B00,
@@ -263,6 +271,9 @@ pub enum CheckCodePrefix {
    ICN0,
    ICN00,
    ICN001,
+    M,
+    M0,
+    M001,
    N,
    N8,
    N80,
@@ -367,6 +378,10 @@ pub enum CheckCodePrefix {
    T20,
    T201,
    T203,
+    TID,
+    TID2,
+    TID25,
+    TID252,
    U,
    U0,
    U00,
@@ -492,6 +507,32 @@ impl CheckCodePrefix {
            CheckCodePrefix::ANN4 => vec![CheckCode::ANN401],
            CheckCodePrefix::ANN40 => vec![CheckCode::ANN401],
            CheckCodePrefix::ANN401 => vec![CheckCode::ANN401],
+            CheckCodePrefix::ARG => vec![
+                CheckCode::ARG001,
+                CheckCode::ARG002,
+                CheckCode::ARG003,
+                CheckCode::ARG004,
+                CheckCode::ARG005,
+            ],
+            CheckCodePrefix::ARG0 => vec![
+                CheckCode::ARG001,
+                CheckCode::ARG002,
+                CheckCode::ARG003,
+                CheckCode::ARG004,
+                CheckCode::ARG005,
+            ],
+            CheckCodePrefix::ARG00 => vec![
+                CheckCode::ARG001,
+                CheckCode::ARG002,
+                CheckCode::ARG003,
+                CheckCode::ARG004,
+                CheckCode::ARG005,
+            ],
+            CheckCodePrefix::ARG001 => vec![CheckCode::ARG001],
+            CheckCodePrefix::ARG002 => vec![CheckCode::ARG002],
+            CheckCodePrefix::ARG003 => vec![CheckCode::ARG003],
+            CheckCodePrefix::ARG004 => vec![CheckCode::ARG004],
+            CheckCodePrefix::ARG005 => vec![CheckCode::ARG005],
            CheckCodePrefix::B => vec![
                CheckCode::B002,
                CheckCode::B003,
@@ -1140,17 +1181,68 @@ impl CheckCodePrefix {
            CheckCodePrefix::FBT001 => vec![CheckCode::FBT001],
            CheckCodePrefix::FBT002 => vec![CheckCode::FBT002],
            CheckCodePrefix::FBT003 => vec![CheckCode::FBT003],
-            CheckCodePrefix::I => vec![CheckCode::I252, CheckCode::I001],
+            CheckCodePrefix::I => vec![CheckCode::I001],
            CheckCodePrefix::I0 => vec![CheckCode::I001],
            CheckCodePrefix::I00 => vec![CheckCode::I001],
            CheckCodePrefix::I001 => vec![CheckCode::I001],
-            CheckCodePrefix::I2 => vec![CheckCode::I252],
-            CheckCodePrefix::I25 => vec![CheckCode::I252],
-            CheckCodePrefix::I252 => vec![CheckCode::I252],
+            CheckCodePrefix::I2 => {
+                eprintln!(
+                    "{}{} {}",
+                    "warning".yellow().bold(),
+                    ":".bold(),
+                    "`I2` has been remapped to `TID2`".bold()
+                );
+                vec![CheckCode::TID252]
+            }
+            CheckCodePrefix::I25 => {
+                eprintln!(
+                    "{}{} {}",
+                    "warning".yellow().bold(),
+                    ":".bold(),
+                    "`I25` has been remapped to `TID25`".bold()
+                );
+                vec![CheckCode::TID252]
+            }
+            CheckCodePrefix::I252 => {
+                eprintln!(
+                    "{}{} {}",
+                    "warning".yellow().bold(),
+                    ":".bold(),
+                    "`I252` has been remapped to `TID252`".bold()
+                );
+                vec![CheckCode::TID252]
+            }
            CheckCodePrefix::ICN => vec![CheckCode::ICN001],
            CheckCodePrefix::ICN0 => vec![CheckCode::ICN001],
            CheckCodePrefix::ICN00 => vec![CheckCode::ICN001],
            CheckCodePrefix::ICN001 => vec![CheckCode::ICN001],
+            CheckCodePrefix::M => {
+                eprintln!(
+                    "{}{} {}",
+                    "warning".yellow().bold(),
+                    ":".bold(),
+                    "`M` has been remapped to `RUF100`".bold()
+                );
+                vec![CheckCode::RUF100]
+            }
+            CheckCodePrefix::M0 => {
+                eprintln!(
+                    "{}{} {}",
+                    "warning".yellow().bold(),
+                    ":".bold(),
+                    "`M0` has been remapped to `RUF100`".bold()
+                );
+                vec![CheckCode::RUF100]
+            }
+            CheckCodePrefix::M001 => {
+                eprintln!(
+                    "{}{} {}",
+                    "warning".yellow().bold(),
+                    ":".bold(),
+                    "`M001` has been remapped to `RUF100`".bold()
+                );
+                vec![CheckCode::RUF100]
+            }
            CheckCodePrefix::N => vec![
                CheckCode::N801,
                CheckCode::N802,
@@ -1379,54 +1471,82 @@ impl CheckCodePrefix {
            CheckCodePrefix::T20 => vec![CheckCode::T201, CheckCode::T203],
            CheckCodePrefix::T201 => vec![CheckCode::T201],
            CheckCodePrefix::T203 => vec![CheckCode::T203],
-            CheckCodePrefix::U => vec![
-                CheckCode::UP001,
-                CheckCode::UP003,
-                CheckCode::UP004,
-                CheckCode::UP005,
-                CheckCode::UP006,
-                CheckCode::UP007,
-                CheckCode::UP008,
-                CheckCode::UP009,
-                CheckCode::UP010,
-                CheckCode::UP011,
-                CheckCode::UP012,
-                CheckCode::UP013,
-                CheckCode::UP014,
-                CheckCode::UP015,
-            ],
-            CheckCodePrefix::U0 => vec![
-                CheckCode::UP001,
-                CheckCode::UP003,
-                CheckCode::UP004,
-                CheckCode::UP005,
-                CheckCode::UP006,
-                CheckCode::UP007,
-                CheckCode::UP008,
-                CheckCode::UP009,
-                CheckCode::UP010,
-                CheckCode::UP011,
-                CheckCode::UP012,
-                CheckCode::UP013,
-                CheckCode::UP014,
-                CheckCode::UP015,
-            ],
-            CheckCodePrefix::U00 => vec![
-                CheckCode::UP001,
-                CheckCode::UP003,
-                CheckCode::UP004,
-                CheckCode::UP005,
-                CheckCode::UP006,
-                CheckCode::UP007,
-                CheckCode::UP008,
-                CheckCode::UP009,
-            ],
+            CheckCodePrefix::TID => vec![CheckCode::TID252],
+            CheckCodePrefix::TID2 => vec![CheckCode::TID252],
+            CheckCodePrefix::TID25 => vec![CheckCode::TID252],
+            CheckCodePrefix::TID252 => vec![CheckCode::TID252],
+            CheckCodePrefix::U => {
+                eprintln!(
+                    "{}{} {}",
+                    "warning".yellow().bold(),
+                    ":".bold(),
+                    "`U` has been remapped to `UP`".bold()
+                );
+                vec![
+                    CheckCode::UP001,
+                    CheckCode::UP003,
+                    CheckCode::UP004,
+                    CheckCode::UP005,
+                    CheckCode::UP006,
+                    CheckCode::UP007,
+                    CheckCode::UP008,
+                    CheckCode::UP009,
+                    CheckCode::UP010,
+                    CheckCode::UP011,
+                    CheckCode::UP012,
+                    CheckCode::UP013,
+                    CheckCode::UP014,
+                    CheckCode::UP015,
+                ]
+            }
+            CheckCodePrefix::U0 => {
+                eprintln!(
+                    "{}{} {}",
+                    "warning".yellow().bold(),
+                    ":".bold(),
+                    "`U0` has been remapped to `UP0`".bold()
+                );
+                vec![
+                    CheckCode::UP001,
+                    CheckCode::UP003,
+                    CheckCode::UP004,
+                    CheckCode::UP005,
+                    CheckCode::UP006,
+                    CheckCode::UP007,
+                    CheckCode::UP008,
+                    CheckCode::UP009,
+                    CheckCode::UP010,
+                    CheckCode::UP011,
+                    CheckCode::UP012,
+                    CheckCode::UP013,
+                    CheckCode::UP014,
+                    CheckCode::UP015,
+                ]
+            }
+            CheckCodePrefix::U00 => {
+                eprintln!(
+                    "{}{} {}",
+                    "warning".yellow().bold(),
+                    ":".bold(),
+                    "`U00` has been remapped to `UP00`".bold()
+                );
+                vec![
+                    CheckCode::UP001,
+                    CheckCode::UP003,
+                    CheckCode::UP004,
+                    CheckCode::UP005,
+                    CheckCode::UP006,
+                    CheckCode::UP007,
+                    CheckCode::UP008,
+                    CheckCode::UP009,
+                ]
+            }
            CheckCodePrefix::U001 => {
                eprintln!(
                    "{}{} {}",
                    "warning".yellow().bold(),
                    ":".bold(),
-                    "`U001` has been renamed to `UP001`".bold()
+                    "`U001` has been remapped to `UP001`".bold()
                );
                vec![CheckCode::UP001]
            }
@@ -1435,7 +1555,7 @@ impl CheckCodePrefix {
                    "{}{} {}",
                    "warning".yellow().bold(),
                    ":".bold(),
-                    "`U003` has been renamed to `UP003`".bold()
+                    "`U003` has been remapped to `UP003`".bold()
                );
                vec![CheckCode::UP003]
            }
@@ -1444,7 +1564,7 @@ impl CheckCodePrefix {
                    "{}{} {}",
                    "warning".yellow().bold(),
                    ":".bold(),
-                    "`U004` has been renamed to `UP004`".bold()
+                    "`U004` has been remapped to `UP004`".bold()
                );
                vec![CheckCode::UP004]
            }
@@ -1453,7 +1573,7 @@ impl CheckCodePrefix {
                    "{}{} {}",
                    "warning".yellow().bold(),
                    ":".bold(),
-                    "`U005` has been renamed to `UP005`".bold()
+                    "`U005` has been remapped to `UP005`".bold()
                );
                vec![CheckCode::UP005]
            }
@@ -1462,7 +1582,7 @@ impl CheckCodePrefix {
                    "{}{} {}",
                    "warning".yellow().bold(),
                    ":".bold(),
-                    "`U006` has been renamed to `UP006`".bold()
+                    "`U006` has been remapped to `UP006`".bold()
                );
                vec![CheckCode::UP006]
            }
@@ -1471,7 +1591,7 @@ impl CheckCodePrefix {
                    "{}{} {}",
                    "warning".yellow().bold(),
                    ":".bold(),
-                    "`U007` has been renamed to `UP007`".bold()
+                    "`U007` has been remapped to `UP007`".bold()
                );
                vec![CheckCode::UP007]
            }
@@ -1480,7 +1600,7 @@ impl CheckCodePrefix {
                    "{}{} {}",
                    "warning".yellow().bold(),
                    ":".bold(),
-                    "`U008` has been renamed to `UP008`".bold()
+                    "`U008` has been remapped to `UP008`".bold()
                );
                vec![CheckCode::UP008]
            }
@@ -1489,24 +1609,32 @@ impl CheckCodePrefix {
                    "{}{} {}",
                    "warning".yellow().bold(),
                    ":".bold(),
-                    "`U009` has been renamed to `UP009`".bold()
+                    "`U009` has been remapped to `UP009`".bold()
                );
                vec![CheckCode::UP009]
            }
-            CheckCodePrefix::U01 => vec![
-                CheckCode::UP010,
-                CheckCode::UP011,
-                CheckCode::UP012,
-                CheckCode::UP013,
-                CheckCode::UP014,
-                CheckCode::UP015,
-            ],
+            CheckCodePrefix::U01 => {
+                eprintln!(
+                    "{}{} {}",
+                    "warning".yellow().bold(),
+                    ":".bold(),
+                    "`U01` has been remapped to `UP01`".bold()
+                );
+                vec![
+                    CheckCode::UP010,
+                    CheckCode::UP011,
+                    CheckCode::UP012,
+                    CheckCode::UP013,
+                    CheckCode::UP014,
+                    CheckCode::UP015,
+                ]
+            }
            CheckCodePrefix::U010 => {
                eprintln!(
                    "{}{} {}",
                    "warning".yellow().bold(),
                    ":".bold(),
-                    "`U010` has been renamed to `UP010`".bold()
+                    "`U010` has been remapped to `UP010`".bold()
                );
                vec![CheckCode::UP010]
            }
@@ -1515,7 +1643,7 @@ impl CheckCodePrefix {
                    "{}{} {}",
                    "warning".yellow().bold(),
                    ":".bold(),
-                    "`U011` has been renamed to `UP011`".bold()
+                    "`U011` has been remapped to `UP011`".bold()
                );
                vec![CheckCode::UP011]
            }
@@ -1524,7 +1652,7 @@ impl CheckCodePrefix {
                    "{}{} {}",
                    "warning".yellow().bold(),
                    ":".bold(),
-                    "`U012` has been renamed to `UP012`".bold()
+                    "`U012` has been remapped to `UP012`".bold()
                );
                vec![CheckCode::UP012]
            }
@@ -1533,7 +1661,7 @@ impl CheckCodePrefix {
                    "{}{} {}",
                    "warning".yellow().bold(),
                    ":".bold(),
-                    "`U013` has been renamed to `UP013`".bold()
+                    "`U013` has been remapped to `UP013`".bold()
                );
                vec![CheckCode::UP013]
            }
@@ -1542,7 +1670,7 @@ impl CheckCodePrefix {
                    "{}{} {}",
                    "warning".yellow().bold(),
                    ":".bold(),
-                    "`U014` has been renamed to `UP014`".bold()
+                    "`U014` has been remapped to `UP014`".bold()
                );
                vec![CheckCode::UP014]
            }
@@ -1551,7 +1679,7 @@ impl CheckCodePrefix {
                    "{}{} {}",
                    "warning".yellow().bold(),
                    ":".bold(),
-                    "`U015` has been renamed to `UP015`".bold()
+                    "`U015` has been remapped to `UP015`".bold()
                );
                vec![CheckCode::UP015]
            }
@@ -1698,6 +1826,14 @@ impl CheckCodePrefix {
            CheckCodePrefix::ANN4 => SuffixLength::One,
            CheckCodePrefix::ANN40 => SuffixLength::Two,
            CheckCodePrefix::ANN401 => SuffixLength::Three,
+            CheckCodePrefix::ARG => SuffixLength::Zero,
+            CheckCodePrefix::ARG0 => SuffixLength::One,
+            CheckCodePrefix::ARG00 => SuffixLength::Two,
+            CheckCodePrefix::ARG001 => SuffixLength::Three,
+            CheckCodePrefix::ARG002 => SuffixLength::Three,
+            CheckCodePrefix::ARG003 => SuffixLength::Three,
+            CheckCodePrefix::ARG004 => SuffixLength::Three,
+            CheckCodePrefix::ARG005 => SuffixLength::Three,
            CheckCodePrefix::B => SuffixLength::Zero,
            CheckCodePrefix::B0 => SuffixLength::One,
            CheckCodePrefix::B00 => SuffixLength::Two,
@@ -1925,6 +2061,9 @@ impl CheckCodePrefix {
            CheckCodePrefix::ICN0 => SuffixLength::One,
            CheckCodePrefix::ICN00 => SuffixLength::Two,
            CheckCodePrefix::ICN001 => SuffixLength::Three,
+            CheckCodePrefix::M => SuffixLength::Zero,
+            CheckCodePrefix::M0 => SuffixLength::One,
+            CheckCodePrefix::M001 => SuffixLength::Three,
            CheckCodePrefix::N => SuffixLength::Zero,
            CheckCodePrefix::N8 => SuffixLength::One,
            CheckCodePrefix::N80 => SuffixLength::Two,
@@ -2029,6 +2168,10 @@ impl CheckCodePrefix {
            CheckCodePrefix::T20 => SuffixLength::Two,
            CheckCodePrefix::T201 => SuffixLength::Three,
            CheckCodePrefix::T203 => SuffixLength::Three,
+            CheckCodePrefix::TID => SuffixLength::Zero,
+            CheckCodePrefix::TID2 => SuffixLength::One,
+            CheckCodePrefix::TID25 => SuffixLength::Two,
+            CheckCodePrefix::TID252 => SuffixLength::Three,
            CheckCodePrefix::U => SuffixLength::Zero,
            CheckCodePrefix::U0 => SuffixLength::One,
            CheckCodePrefix::U00 => SuffixLength::Two,
@@ -2096,6 +2239,7 @@ impl CheckCodePrefix {
 pub const CATEGORIES: &[CheckCodePrefix] = &[
    CheckCodePrefix::A,
    CheckCodePrefix::ANN,
+    CheckCodePrefix::ARG,
    CheckCodePrefix::B,
    CheckCodePrefix::BLE,
    CheckCodePrefix::C,
@@ -2117,7 +2261,7 @@ pub const CATEGORIES: &[CheckCodePrefix] = &[
    CheckCodePrefix::RUF,
    CheckCodePrefix::S,
    CheckCodePrefix::T,
-    CheckCodePrefix::U,
+    CheckCodePrefix::TID,
    CheckCodePrefix::UP,
    CheckCodePrefix::W,
    CheckCodePrefix::YTT,
--- a/src/flake8_annotations/helpers.rs
+++ b/src/flake8_annotations/helpers.rs
@@ -1,5 +1,6 @@
 use rustpython_ast::{Arguments, Expr, Stmt, StmtKind};

+use crate::ast::cast;
 use crate::check_ast::Checker;
 use crate::docstrings::definition::{Definition, DefinitionKind};
 use crate::visibility;
@@ -32,7 +33,7 @@ pub fn overloaded_name(checker: &Checker, definition: &Definition) -> Option<Str
    | DefinitionKind::NestedFunction(stmt)
    | DefinitionKind::Method(stmt) = definition.kind
    {
-        if visibility::is_overload(checker, stmt) {
+        if visibility::is_overload(checker, cast::decorator_list(stmt)) {
            let (name, ..) = match_function_def(stmt);
            Some(name.to_string())
        } else {
@@ -50,7 +51,7 @@ pub fn is_overload_impl(checker: &Checker, definition: &Definition, overloaded_n
    | DefinitionKind::NestedFunction(stmt)
    | DefinitionKind::Method(stmt) = definition.kind
    {
-        if visibility::is_overload(checker, stmt) {
+        if visibility::is_overload(checker, cast::decorator_list(stmt)) {
            false
        } else {
            let (name, ..) = match_function_def(stmt);
--- a/src/flake8_annotations/plugins.rs
+++ b/src/flake8_annotations/plugins.rs
@@ -1,8 +1,8 @@
 use rustpython_ast::{Constant, Expr, ExprKind, Stmt, StmtKind};

 use crate::ast::types::Range;
-use crate::ast::visitor;
 use crate::ast::visitor::Visitor;
+use crate::ast::{cast, visitor};
 use crate::check_ast::Checker;
 use crate::checks::{CheckCode, CheckKind};
 use crate::docstrings::definition::{Definition, DefinitionKind};
@@ -192,7 +192,10 @@ pub fn definition(checker: &mut Checker, definition: &Definition, visibility: &V
                .chain(args.kwonlyargs.iter())
                .skip(
                    // If this is a non-static method, skip `cls` or `self`.
-                    usize::from(!visibility::is_staticmethod(checker, stmt)),
+                    usize::from(!visibility::is_staticmethod(
+                        checker,
+                        cast::decorator_list(stmt),
+                    )),
                )
            {
                // ANN401 for dynamically typed arguments
@@ -264,10 +267,10 @@ pub fn definition(checker: &mut Checker, definition: &Definition, visibility: &V
            }

            // ANN101, ANN102
-            if !visibility::is_staticmethod(checker, stmt) {
+            if !visibility::is_staticmethod(checker, cast::decorator_list(stmt)) {
                if let Some(arg) = args.args.first() {
                    if arg.node.annotation.is_none() {
-                        if visibility::is_classmethod(checker, stmt) {
+                        if visibility::is_classmethod(checker, cast::decorator_list(stmt)) {
                            if checker.settings.enabled.contains(&CheckCode::ANN102) {
                                checker.add_check(Check::new(
                                    CheckKind::MissingTypeCls(arg.node.arg.to_string()),
@@ -300,14 +303,14 @@ pub fn definition(checker: &mut Checker, definition: &Definition, visibility: &V
                    return;
                }

-                if visibility::is_classmethod(checker, stmt) {
+                if visibility::is_classmethod(checker, cast::decorator_list(stmt)) {
                    if checker.settings.enabled.contains(&CheckCode::ANN206) {
                        checker.add_check(Check::new(
                            CheckKind::MissingReturnTypeClassMethod(name.to_string()),
                            Range::from_located(stmt),
                        ));
                    }
-                } else if visibility::is_staticmethod(checker, stmt) {
+                } else if visibility::is_staticmethod(checker, cast::decorator_list(stmt)) {
                    if checker.settings.enabled.contains(&CheckCode::ANN205) {
                        checker.add_check(Check::new(
                            CheckKind::MissingReturnTypeStaticMethod(name.to_string()),
--- a/src/flake8_bugbear/plugins/duplicate_exceptions.rs
+++ b/src/flake8_bugbear/plugins/duplicate_exceptions.rs
@@ -1,6 +1,5 @@
-use std::collections::BTreeSet;
-
 use itertools::Itertools;
+use rustc_hash::FxHashSet;
 use rustpython_ast::{
    Excepthandler, ExcepthandlerKind, Expr, ExprContext, ExprKind, Location, Stmt,
 };
@@ -27,9 +26,9 @@ fn duplicate_handler_exceptions<'a>(
    checker: &mut Checker,
    expr: &'a Expr,
    elts: &'a [Expr],
-) -> BTreeSet<Vec<&'a str>> {
-    let mut seen: BTreeSet<Vec<&str>> = BTreeSet::default();
-    let mut duplicates: BTreeSet<Vec<&str>> = BTreeSet::default();
+) -> FxHashSet<Vec<&'a str>> {
+    let mut seen: FxHashSet<Vec<&str>> = FxHashSet::default();
+    let mut duplicates: FxHashSet<Vec<&str>> = FxHashSet::default();
    let mut unique_elts: Vec<&Expr> = Vec::default();
    for type_ in elts {
        let call_path = helpers::collect_call_paths(type_);
@@ -76,8 +75,8 @@ fn duplicate_handler_exceptions<'a>(
 }

 pub fn duplicate_exceptions(checker: &mut Checker, stmt: &Stmt, handlers: &[Excepthandler]) {
-    let mut seen: BTreeSet<Vec<&str>> = BTreeSet::default();
-    let mut duplicates: BTreeSet<Vec<&str>> = BTreeSet::default();
+    let mut seen: FxHashSet<Vec<&str>> = FxHashSet::default();
+    let mut duplicates: FxHashSet<Vec<&str>> = FxHashSet::default();
    for handler in handlers {
        let ExcepthandlerKind::ExceptHandler { type_: Some(type_), .. } = &handler.node else {
            continue;
--- a/src/flake8_import_conventions/checks.rs
+++ b/src/flake8_import_conventions/checks.rs
@@ -1,5 +1,4 @@
-use std::collections::BTreeMap;
-
+use rustc_hash::FxHashMap;
 use rustpython_ast::Stmt;

 use crate::ast::types::Range;
@@ -10,7 +9,7 @@ pub fn check_conventional_import(
    import_from: &Stmt,
    name: &str,
    asname: Option<&str>,
-    conventions: &BTreeMap<String, String>,
+    conventions: &FxHashMap<String, String>,
 ) -> Option<Check> {
    let mut is_valid_import = true;
    if let Some(expected_alias) = conventions.get(name) {
--- a/src/flake8_import_conventions/mod.rs
+++ b/src/flake8_import_conventions/mod.rs
@@ -3,10 +3,11 @@ pub mod settings;

 #[cfg(test)]
 mod tests {
-    use std::collections::BTreeMap;
+
    use std::path::Path;

    use anyhow::Result;
+    use rustc_hash::FxHashMap;

    use crate::checks::CheckCode;
    use crate::linter::test_path;
@@ -33,7 +34,7 @@ mod tests {
                    flake8_import_conventions::settings::Settings::from_options(
                        flake8_import_conventions::settings::Options {
                            aliases: None,
-                            extend_aliases: Some(BTreeMap::from([
+                            extend_aliases: Some(FxHashMap::from_iter([
                                ("dask.array".to_string(), "da".to_string()),
                                ("dask.dataframe".to_string(), "dd".to_string()),
                            ])),
@@ -56,7 +57,7 @@ mod tests {
                flake8_import_conventions:
                    flake8_import_conventions::settings::Settings::from_options(
                        flake8_import_conventions::settings::Options {
-                            aliases: Some(BTreeMap::from([
+                            aliases: Some(FxHashMap::from_iter([
                                ("altair".to_string(), "alt".to_string()),
                                ("matplotlib.pyplot".to_string(), "plt".to_string()),
                                ("pandas".to_string(), "pd".to_string()),
@@ -83,7 +84,7 @@ mod tests {
                    flake8_import_conventions::settings::Settings::from_options(
                        flake8_import_conventions::settings::Options {
                            aliases: None,
-                            extend_aliases: Some(BTreeMap::from([(
+                            extend_aliases: Some(FxHashMap::from_iter([(
                                "numpy".to_string(),
                                "nmp".to_string(),
                            )])),
--- a/src/flake8_import_conventions/settings.rs
+++ b/src/flake8_import_conventions/settings.rs
@@ -1,8 +1,10 @@
 //! Settings for import conventions.

-use std::collections::BTreeMap;
+use std::hash::{Hash, Hasher};

+use itertools::Itertools;
 use ruff_macros::ConfigurationOptions;
+use rustc_hash::FxHashMap;
 use serde::{Deserialize, Serialize};

 const CONVENTIONAL_ALIASES: &[(&str, &str)] = &[
@@ -20,7 +22,7 @@ pub struct Options {
        doc = "The conventional aliases for imports. These aliases can be extended by the \
               `extend_aliases` option.",
        default = r#"{"altair": "alt", "matplotlib.pyplot": "plt", "numpy": "np", "pandas": "pd", "seaborn": "sns"}"#,
-        value_type = "BTreeMap<String, String>",
+        value_type = "FxHashMap<String, String>",
        example = r#"
            # Declare the default aliases.
            altair = "alt"
@@ -30,33 +32,41 @@ pub struct Options {
            seaborn = "sns"
        "#
    )]
-    pub aliases: Option<BTreeMap<String, String>>,
+    pub aliases: Option<FxHashMap<String, String>>,
    #[option(
        doc = "A mapping of modules to their conventional import aliases. These aliases will be \
               added to the `aliases` mapping.",
        default = r#"{}"#,
-        value_type = "BTreeMap<String, String>",
+        value_type = "FxHashMap<String, String>",
        example = r#"
            # Declare a custom alias for the `matplotlib` module.
            "dask.dataframe" = "dd"
        "#
    )]
-    pub extend_aliases: Option<BTreeMap<String, String>>,
+    pub extend_aliases: Option<FxHashMap<String, String>>,
 }

-#[derive(Debug, Hash)]
+#[derive(Debug)]
 pub struct Settings {
-    pub aliases: BTreeMap<String, String>,
+    pub aliases: FxHashMap<String, String>,
 }

-fn default_aliases() -> BTreeMap<String, String> {
+impl Hash for Settings {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        for value in self.aliases.iter().sorted() {
+            value.hash(state);
+        }
+    }
+}
+
+fn default_aliases() -> FxHashMap<String, String> {
    CONVENTIONAL_ALIASES
        .iter()
        .map(|(k, v)| ((*k).to_string(), (*v).to_string()))
-        .collect::<BTreeMap<_, _>>()
+        .collect::<FxHashMap<_, _>>()
 }

-fn resolve_aliases(options: Options) -> BTreeMap<String, String> {
+fn resolve_aliases(options: Options) -> FxHashMap<String, String> {
    let mut aliases = match options.aliases {
        Some(options_aliases) => options_aliases,
        None => default_aliases(),
--- a/src/flake8_tidy_imports/mod.rs
+++ b/src/flake8_tidy_imports/mod.rs
@@ -15,12 +15,12 @@ mod tests {
    #[test]
    fn ban_parent_imports() -> Result<()> {
        let mut checks = test_path(
-            Path::new("./resources/test/fixtures/flake8_tidy_imports/I252.py"),
+            Path::new("./resources/test/fixtures/flake8_tidy_imports/TID252.py"),
            &Settings {
                flake8_tidy_imports: flake8_tidy_imports::settings::Settings {
                    ban_relative_imports: Strictness::Parents,
                },
-                ..Settings::for_rules(vec![CheckCode::I252])
+                ..Settings::for_rules(vec![CheckCode::TID252])
            },
            true,
        )?;
@@ -32,12 +32,12 @@ mod tests {
    #[test]
    fn ban_all_imports() -> Result<()> {
        let mut checks = test_path(
-            Path::new("./resources/test/fixtures/flake8_tidy_imports/I252.py"),
+            Path::new("./resources/test/fixtures/flake8_tidy_imports/TID252.py"),
            &Settings {
                flake8_tidy_imports: flake8_tidy_imports::settings::Settings {
                    ban_relative_imports: Strictness::All,
                },
-                ..Settings::for_rules(vec![CheckCode::I252])
+                ..Settings::for_rules(vec![CheckCode::TID252])
            },
            true,
        )?;
--- a/src/flake8_unused_arguments/helpers.rs
+++ b/src/flake8_unused_arguments/helpers.rs
@@ -0,0 +1,19 @@
+use rustpython_ast::{Constant, ExprKind, Stmt, StmtKind};
+
+pub fn is_empty(body: &[Stmt]) -> bool {
+    match &body {
+        [] => true,
+        // Also allow: raise NotImplementedError, raise NotImplemented
+        [stmt] => match &stmt.node {
+            StmtKind::Pass => true,
+            StmtKind::Expr { value } => match &value.node {
+                ExprKind::Constant { value, .. } => {
+                    matches!(value, Constant::Str(_) | Constant::Ellipsis)
+                }
+                _ => false,
+            },
+            _ => false,
+        },
+        _ => false,
+    }
+}
--- a/src/flake8_unused_arguments/mod.rs
+++ b/src/flake8_unused_arguments/mod.rs
@@ -0,0 +1,35 @@
+mod helpers;
+pub mod plugins;
+mod types;
+
+#[cfg(test)]
+mod tests {
+    use std::convert::AsRef;
+    use std::path::Path;
+
+    use anyhow::Result;
+    use test_case::test_case;
+
+    use crate::checks::CheckCode;
+    use crate::linter::test_path;
+    use crate::settings;
+
+    #[test_case(CheckCode::ARG001, Path::new("ARG.py"); "ARG001")]
+    #[test_case(CheckCode::ARG002, Path::new("ARG.py"); "ARG002")]
+    #[test_case(CheckCode::ARG003, Path::new("ARG.py"); "ARG003")]
+    #[test_case(CheckCode::ARG004, Path::new("ARG.py"); "ARG004")]
+    #[test_case(CheckCode::ARG005, Path::new("ARG.py"); "ARG005")]
+    fn checks(check_code: CheckCode, path: &Path) -> Result<()> {
+        let snapshot = format!("{}_{}", check_code.as_ref(), path.to_string_lossy());
+        let mut checks = test_path(
+            Path::new("./resources/test/fixtures/flake8_unused_arguments")
+                .join(path)
+                .as_path(),
+            &settings::Settings::for_rule(check_code),
+            true,
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(snapshot, checks);
+        Ok(())
+    }
+}
--- a/src/flake8_unused_arguments/plugins.rs
+++ b/src/flake8_unused_arguments/plugins.rs
@@ -0,0 +1,184 @@
+use std::iter;
+
+use regex::Regex;
+use rustc_hash::FxHashMap;
+use rustpython_ast::{Arg, Arguments};
+
+use crate::ast::function_type;
+use crate::ast::function_type::FunctionType;
+use crate::ast::helpers::collect_arg_names;
+use crate::ast::types::{Binding, BindingKind, FunctionDef, Lambda, Scope, ScopeKind};
+use crate::check_ast::Checker;
+use crate::flake8_unused_arguments::helpers;
+use crate::flake8_unused_arguments::types::Argumentable;
+use crate::{visibility, Check};
+
+/// Check a plain function for unused arguments.
+fn function(
+    argumentable: &Argumentable,
+    args: &Arguments,
+    bindings: &FxHashMap<&str, Binding>,
+    dummy_variable_rgx: &Regex,
+) -> Vec<Check> {
+    let mut checks: Vec<Check> = vec![];
+    for arg_name in collect_arg_names(args) {
+        if let Some(binding) = bindings.get(arg_name) {
+            if binding.used.is_none()
+                && matches!(binding.kind, BindingKind::Argument)
+                && !dummy_variable_rgx.is_match(arg_name)
+            {
+                checks.push(Check::new(
+                    argumentable.check_for(arg_name.to_string()),
+                    binding.range,
+                ));
+            }
+        }
+    }
+    checks
+}
+
+/// Check a method for unused arguments.
+fn method(
+    argumentable: &Argumentable,
+    args: &Arguments,
+    bindings: &FxHashMap<&str, Binding>,
+    dummy_variable_rgx: &Regex,
+) -> Vec<Check> {
+    let mut checks: Vec<Check> = vec![];
+    for arg in args
+        .posonlyargs
+        .iter()
+        .chain(args.args.iter())
+        .skip(1)
+        .chain(args.kwonlyargs.iter())
+        .chain(iter::once::<Option<&Arg>>(args.vararg.as_deref()).flatten())
+        .chain(iter::once::<Option<&Arg>>(args.kwarg.as_deref()).flatten())
+    {
+        if let Some(binding) = bindings.get(&arg.node.arg.as_str()) {
+            if binding.used.is_none()
+                && matches!(binding.kind, BindingKind::Argument)
+                && !dummy_variable_rgx.is_match(arg.node.arg.as_str())
+            {
+                checks.push(Check::new(
+                    argumentable.check_for(arg.node.arg.to_string()),
+                    binding.range,
+                ));
+            }
+        }
+    }
+    checks
+}
+
+/// ARG001, ARG002, ARG003, ARG004, ARG005
+pub fn unused_arguments(checker: &Checker, parent: &Scope, scope: &Scope) -> Vec<Check> {
+    match &scope.kind {
+        ScopeKind::Function(FunctionDef {
+            name,
+            args,
+            body,
+            decorator_list,
+            ..
+        }) => {
+            match function_type::classify(
+                parent,
+                name,
+                decorator_list,
+                &checker.from_imports,
+                &checker.import_aliases,
+                &checker.settings.pep8_naming.classmethod_decorators,
+                &checker.settings.pep8_naming.staticmethod_decorators,
+            ) {
+                FunctionType::Function => {
+                    if checker
+                        .settings
+                        .enabled
+                        .contains(Argumentable::Function.check_code())
+                    {
+                        function(
+                            &Argumentable::Function,
+                            args,
+                            &scope.values,
+                            &checker.settings.dummy_variable_rgx,
+                        )
+                    } else {
+                        vec![]
+                    }
+                }
+                FunctionType::Method => {
+                    if checker
+                        .settings
+                        .enabled
+                        .contains(Argumentable::Method.check_code())
+                        && !helpers::is_empty(body)
+                        && !visibility::is_abstract(checker, decorator_list)
+                        && !visibility::is_override(checker, decorator_list)
+                    {
+                        method(
+                            &Argumentable::Method,
+                            args,
+                            &scope.values,
+                            &checker.settings.dummy_variable_rgx,
+                        )
+                    } else {
+                        vec![]
+                    }
+                }
+                FunctionType::ClassMethod => {
+                    if checker
+                        .settings
+                        .enabled
+                        .contains(Argumentable::ClassMethod.check_code())
+                        && !helpers::is_empty(body)
+                        && !visibility::is_abstract(checker, decorator_list)
+                        && !visibility::is_override(checker, decorator_list)
+                    {
+                        method(
+                            &Argumentable::ClassMethod,
+                            args,
+                            &scope.values,
+                            &checker.settings.dummy_variable_rgx,
+                        )
+                    } else {
+                        vec![]
+                    }
+                }
+                FunctionType::StaticMethod => {
+                    if checker
+                        .settings
+                        .enabled
+                        .contains(Argumentable::StaticMethod.check_code())
+                        && !helpers::is_empty(body)
+                        && !visibility::is_abstract(checker, decorator_list)
+                        && !visibility::is_override(checker, decorator_list)
+                    {
+                        function(
+                            &Argumentable::StaticMethod,
+                            args,
+                            &scope.values,
+                            &checker.settings.dummy_variable_rgx,
+                        )
+                    } else {
+                        vec![]
+                    }
+                }
+            }
+        }
+        ScopeKind::Lambda(Lambda { args, .. }) => {
+            if checker
+                .settings
+                .enabled
+                .contains(Argumentable::Lambda.check_code())
+            {
+                function(
+                    &Argumentable::Lambda,
+                    args,
+                    &scope.values,
+                    &checker.settings.dummy_variable_rgx,
+                )
+            } else {
+                vec![]
+            }
+        }
+        _ => unreachable!("Expected ScopeKind::Function | ScopeKind::Lambda"),
+    }
+}
--- a/src/flake8_unused_arguments/snapshots/ruff__flake8_unused_argumentstestsARG001_ARG.py.snap
+++ b/src/flake8_unused_arguments/snapshots/ruff__flake8_unused_argumentstestsARG001_ARG.py.snap
@@ -0,0 +1,77 @@
+---
+source: src/flake8_unused_arguments/mod.rs
+expression: checks
+---
+- kind:
+    UnusedFunctionArgument: self
+  location:
+    row: 8
+    column: 6
+  end_location:
+    row: 8
+    column: 10
+  fix: ~
+- kind:
+    UnusedFunctionArgument: x
+  location:
+    row: 8
+    column: 12
+  end_location:
+    row: 8
+    column: 13
+  fix: ~
+- kind:
+    UnusedFunctionArgument: cls
+  location:
+    row: 12
+    column: 6
+  end_location:
+    row: 12
+    column: 9
+  fix: ~
+- kind:
+    UnusedFunctionArgument: x
+  location:
+    row: 12
+    column: 11
+  end_location:
+    row: 12
+    column: 12
+  fix: ~
+- kind:
+    UnusedFunctionArgument: self
+  location:
+    row: 16
+    column: 6
+  end_location:
+    row: 16
+    column: 10
+  fix: ~
+- kind:
+    UnusedFunctionArgument: x
+  location:
+    row: 16
+    column: 12
+  end_location:
+    row: 16
+    column: 13
+  fix: ~
+- kind:
+    UnusedFunctionArgument: cls
+  location:
+    row: 20
+    column: 6
+  end_location:
+    row: 20
+    column: 9
+  fix: ~
+- kind:
+    UnusedFunctionArgument: x
+  location:
+    row: 20
+    column: 11
+  end_location:
+    row: 20
+    column: 12
+  fix: ~
+
--- a/src/flake8_unused_arguments/snapshots/ruff__flake8_unused_argumentstestsARG002_ARG.py.snap
+++ b/src/flake8_unused_arguments/snapshots/ruff__flake8_unused_argumentstestsARG002_ARG.py.snap
@@ -0,0 +1,32 @@
+---
+source: src/flake8_unused_arguments/mod.rs
+expression: checks
+---
+- kind:
+    UnusedMethodArgument: x
+  location:
+    row: 34
+    column: 16
+  end_location:
+    row: 34
+    column: 17
+  fix: ~
+- kind:
+    UnusedMethodArgument: x
+  location:
+    row: 37
+    column: 19
+  end_location:
+    row: 37
+    column: 20
+  fix: ~
+- kind:
+    UnusedMethodArgument: x
+  location:
+    row: 40
+    column: 15
+  end_location:
+    row: 40
+    column: 16
+  fix: ~
+
--- a/src/flake8_unused_arguments/snapshots/ruff__flake8_unused_argumentstestsARG003_ARG.py.snap
+++ b/src/flake8_unused_arguments/snapshots/ruff__flake8_unused_argumentstestsARG003_ARG.py.snap
@@ -0,0 +1,14 @@
+---
+source: src/flake8_unused_arguments/mod.rs
+expression: checks
+---
+- kind:
+    UnusedClassMethodArgument: x
+  location:
+    row: 44
+    column: 15
+  end_location:
+    row: 44
+    column: 16
+  fix: ~
+
--- a/src/flake8_unused_arguments/snapshots/ruff__flake8_unused_argumentstestsARG004_ARG.py.snap
+++ b/src/flake8_unused_arguments/snapshots/ruff__flake8_unused_argumentstestsARG004_ARG.py.snap
@@ -0,0 +1,32 @@
+---
+source: src/flake8_unused_arguments/mod.rs
+expression: checks
+---
+- kind:
+    UnusedStaticMethodArgument: cls
+  location:
+    row: 48
+    column: 10
+  end_location:
+    row: 48
+    column: 13
+  fix: ~
+- kind:
+    UnusedStaticMethodArgument: x
+  location:
+    row: 48
+    column: 15
+  end_location:
+    row: 48
+    column: 16
+  fix: ~
+- kind:
+    UnusedStaticMethodArgument: x
+  location:
+    row: 52
+    column: 10
+  end_location:
+    row: 52
+    column: 11
+  fix: ~
+
--- a/src/flake8_unused_arguments/snapshots/ruff__flake8_unused_argumentstestsARG005_ARG.py.snap
+++ b/src/flake8_unused_arguments/snapshots/ruff__flake8_unused_argumentstestsARG005_ARG.py.snap
@@ -0,0 +1,14 @@
+---
+source: src/flake8_unused_arguments/mod.rs
+expression: checks
+---
+- kind:
+    UnusedLambdaArgument: x
+  location:
+    row: 27
+    column: 7
+  end_location:
+    row: 27
+    column: 8
+  fix: ~
+
--- a/src/flake8_unused_arguments/types.rs
+++ b/src/flake8_unused_arguments/types.rs
@@ -0,0 +1,32 @@
+use crate::checks::{CheckCode, CheckKind};
+
+/// An AST node that can contain arguments.
+pub enum Argumentable {
+    Function,
+    Method,
+    ClassMethod,
+    StaticMethod,
+    Lambda,
+}
+
+impl Argumentable {
+    pub fn check_for(&self, name: String) -> CheckKind {
+        match self {
+            Argumentable::Function => CheckKind::UnusedFunctionArgument(name),
+            Argumentable::Method => CheckKind::UnusedMethodArgument(name),
+            Argumentable::ClassMethod => CheckKind::UnusedClassMethodArgument(name),
+            Argumentable::StaticMethod => CheckKind::UnusedStaticMethodArgument(name),
+            Argumentable::Lambda => CheckKind::UnusedLambdaArgument(name),
+        }
+    }
+
+    pub fn check_code(&self) -> &CheckCode {
+        match self {
+            Argumentable::Function => &CheckCode::ARG001,
+            Argumentable::Method => &CheckCode::ARG002,
+            Argumentable::ClassMethod => &CheckCode::ARG003,
+            Argumentable::StaticMethod => &CheckCode::ARG004,
+            Argumentable::Lambda => &CheckCode::ARG005,
+        }
+    }
+}
--- a/src/fs.rs
+++ b/src/fs.rs
@@ -1,5 +1,4 @@
 use std::borrow::Cow;
-use std::collections::BTreeSet;
 use std::fs::File;
 use std::io::{BufReader, Read};
 use std::path::{Path, PathBuf};
@@ -8,6 +7,7 @@ use anyhow::{anyhow, Result};
 use globset::GlobMatcher;
 use log::debug;
 use path_absolutize::{path_dedot, Absolutize};
+use rustc_hash::FxHashSet;
 use walkdir::{DirEntry, WalkDir};

 use crate::checks::CheckCode;
@@ -83,8 +83,8 @@ pub fn iter_python_files<'a>(
 /// Create tree set with codes matching the pattern/code pairs.
 pub(crate) fn ignores_from_path<'a>(
    path: &Path,
-    pattern_code_pairs: &'a [(GlobMatcher, GlobMatcher, BTreeSet<CheckCode>)],
-) -> Result<BTreeSet<&'a CheckCode>> {
+    pattern_code_pairs: &'a [(GlobMatcher, GlobMatcher, FxHashSet<CheckCode>)],
+) -> Result<FxHashSet<&'a CheckCode>> {
    let (file_path, file_basename) = extract_path_names(path)?;
    Ok(pattern_code_pairs
        .iter()
--- a/src/isort/mod.rs
+++ b/src/isort/mod.rs
@@ -559,6 +559,7 @@ mod tests {
    #[test_case(Path::new("force_wrap_aliases.py"))]
    #[test_case(Path::new("import_from_after_import.py"))]
    #[test_case(Path::new("insert_empty_lines.py"))]
+    #[test_case(Path::new("insert_empty_lines.pyi"))]
    #[test_case(Path::new("leading_prefix.py"))]
    #[test_case(Path::new("no_reorder_within_section.py"))]
    #[test_case(Path::new("no_wrap_star.py"))]
--- a/src/isort/snapshots/ruffisorttests__insert_empty_lines.pyi.snap
+++ b/src/isort/snapshots/ruffisorttests__insert_empty_lines.pyi.snap
@@ -0,0 +1,65 @@
+---
+source: src/isort/mod.rs
+expression: checks
+---
+- kind: UnsortedImports
+  location:
+    row: 1
+    column: 0
+  end_location:
+    row: 3
+    column: 0
+  fix:
+    content: "import a\nimport b\n\n"
+    location:
+      row: 1
+      column: 0
+    end_location:
+      row: 3
+      column: 0
+- kind: UnsortedImports
+  location:
+    row: 4
+    column: 0
+  end_location:
+    row: 6
+    column: 0
+  fix:
+    content: "import os\nimport sys\n\n"
+    location:
+      row: 4
+      column: 0
+    end_location:
+      row: 6
+      column: 0
+- kind: UnsortedImports
+  location:
+    row: 14
+    column: 0
+  end_location:
+    row: 16
+    column: 0
+  fix:
+    content: "import os\nimport sys\n\n"
+    location:
+      row: 14
+      column: 0
+    end_location:
+      row: 16
+      column: 0
+- kind: UnsortedImports
+  location:
+    row: 33
+    column: 0
+  end_location:
+    row: 35
+    column: 0
+  fix:
+    content: "    import collections\n    import typing\n\n"
+    location:
+      row: 33
+      column: 0
+    end_location:
+      row: 35
+      column: 0
+
--- a/src/isort/track.rs
+++ b/src/isort/track.rs
@@ -1,3 +1,5 @@
+use std::path::Path;
+
 use rustpython_ast::{
    Alias, Arg, Arguments, Boolop, Cmpop, Comprehension, Constant, Excepthandler,
    ExcepthandlerKind, Expr, ExprContext, Keyword, MatchCase, Operator, Pattern, Stmt, StmtKind,
@@ -20,16 +22,18 @@ pub struct Block<'a> {
 }

 pub struct ImportTracker<'a> {
-    blocks: Vec<Block<'a>>,
    directives: &'a IsortDirectives,
+    pyi: bool,
+    blocks: Vec<Block<'a>>,
    split_index: usize,
    nested: bool,
 }

 impl<'a> ImportTracker<'a> {
-    pub fn new(directives: &'a IsortDirectives) -> Self {
+    pub fn new(directives: &'a IsortDirectives, path: &'a Path) -> Self {
        Self {
            directives,
+            pyi: path.extension().map_or(false, |ext| ext == "pyi"),
            blocks: vec![Block::default()],
            split_index: 0,
            nested: false,
@@ -41,6 +45,34 @@ impl<'a> ImportTracker<'a> {
        self.blocks[index].imports.push(stmt);
    }

+    fn trailer_for(&self, stmt: &'a Stmt) -> Option<Trailer> {
+        if self.pyi {
+            // Black treats interface files differently, limiting to one newline
+            // (`Trailing::Sibling`), and avoiding inserting any newlines in nested function
+            // blocks.
+            if self.nested
+                && matches!(
+                    stmt.node,
+                    StmtKind::FunctionDef { .. } | StmtKind::AsyncFunctionDef { .. }
+                )
+            {
+                None
+            } else {
+                Some(Trailer::Sibling)
+            }
+        } else if self.nested {
+            Some(Trailer::Sibling)
+        } else {
+            Some(match &stmt.node {
+                StmtKind::FunctionDef { .. } | StmtKind::AsyncFunctionDef { .. } => {
+                    Trailer::FunctionDef
+                }
+                StmtKind::ClassDef { .. } => Trailer::ClassDef,
+                _ => Trailer::Sibling,
+            })
+        }
+    }
+
    fn finalize(&mut self, trailer: Option<Trailer>) {
        let index = self.blocks.len() - 1;
        if !self.blocks[index].imports.is_empty() {
@@ -62,17 +94,7 @@ where
        // Track manual splits.
        while self.split_index < self.directives.splits.len() {
            if stmt.location.row() >= self.directives.splits[self.split_index] {
-                self.finalize(Some(if self.nested {
-                    Trailer::Sibling
-                } else {
-                    match &stmt.node {
-                        StmtKind::FunctionDef { .. } | StmtKind::AsyncFunctionDef { .. } => {
-                            Trailer::FunctionDef
-                        }
-                        StmtKind::ClassDef { .. } => Trailer::ClassDef,
-                        _ => Trailer::Sibling,
-                    }
-                }));
+                self.finalize(self.trailer_for(stmt));
                self.split_index += 1;
            } else {
                break;
@@ -87,17 +109,7 @@ where
        {
            self.track_import(stmt);
        } else {
-            self.finalize(Some(if self.nested {
-                Trailer::Sibling
-            } else {
-                match &stmt.node {
-                    StmtKind::FunctionDef { .. } | StmtKind::AsyncFunctionDef { .. } => {
-                        Trailer::FunctionDef
-                    }
-                    StmtKind::ClassDef { .. } => Trailer::ClassDef,
-                    _ => Trailer::Sibling,
-                }
-            }));
+            self.finalize(self.trailer_for(stmt));
        }

        // Track scope.
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -54,6 +54,7 @@ mod flake8_print;
 pub mod flake8_quotes;
 mod flake8_return;
 pub mod flake8_tidy_imports;
+mod flake8_unused_arguments;
 pub mod fs;
 mod isort;
 mod lex;
--- a/src/linter.rs
+++ b/src/linter.rs
@@ -92,6 +92,7 @@ pub(crate) fn check_path(
                        &directives.isort,
                        settings,
                        autofix,
+                        path,
                    ));
                }
            }
@@ -133,7 +134,7 @@ pub(crate) fn check_path(
    Ok(checks)
 }

-const MAX_ITERATIONS: usize = 1;
+const MAX_ITERATIONS: usize = 100;

 /// Lint the source code at the given `Path`.
 pub fn lint_path(
--- a/src/main.rs
+++ b/src/main.rs
@@ -392,7 +392,7 @@ fn inner_main() -> Result<ExitCode> {
        // unless we're writing fixes via stdin (in which case, the transformed
        // source code goes to stdout).
        if !(is_stdin && matches!(autofix, fixer::Mode::Apply)) {
-            printer.write_once(&diagnostics)?;
+            printer.write_once(&diagnostics, &autofix)?;
        }

        // Check for updates if we're in a non-silent log level.
--- a/src/noqa.rs
+++ b/src/noqa.rs
@@ -1,4 +1,3 @@
-use std::collections::{BTreeMap, BTreeSet};
 use std::fs;
 use std::path::Path;

@@ -7,8 +6,9 @@ use itertools::Itertools;
 use nohash_hasher::IntMap;
 use once_cell::sync::Lazy;
 use regex::Regex;
+use rustc_hash::{FxHashMap, FxHashSet};

-use crate::checks::{Check, CheckCode, REDIRECTS};
+use crate::checks::{Check, CheckCode, CODE_REDIRECTS};

 static NO_QA_LINE_REGEX: Lazy<Regex> = Lazy::new(|| {
    Regex::new(
@@ -70,7 +70,7 @@ pub fn extract_noqa_directive(line: &str) -> Directive {
 pub fn includes(needle: &CheckCode, haystack: &[&str]) -> bool {
    let needle: &str = needle.as_ref();
    haystack.iter().any(|candidate| {
-        if let Some(candidate) = REDIRECTS.get(candidate) {
+        if let Some(candidate) = CODE_REDIRECTS.get(candidate) {
            needle == candidate.as_ref()
        } else {
            &needle == candidate
@@ -83,7 +83,7 @@ pub fn add_noqa(
    checks: &[Check],
    contents: &str,
    noqa_line_for: &IntMap<usize, usize>,
-    external: &BTreeSet<String>,
+    external: &FxHashSet<String>,
 ) -> Result<usize> {
    let (count, output) = add_noqa_inner(checks, contents, noqa_line_for, external);
    fs::write(path, output)?;
@@ -94,16 +94,16 @@ fn add_noqa_inner(
    checks: &[Check],
    contents: &str,
    noqa_line_for: &IntMap<usize, usize>,
-    external: &BTreeSet<String>,
+    external: &FxHashSet<String>,
 ) -> (usize, String) {
-    let mut matches_by_line: BTreeMap<usize, BTreeSet<&CheckCode>> = BTreeMap::new();
+    let mut matches_by_line: FxHashMap<usize, FxHashSet<&CheckCode>> = FxHashMap::default();
    for (lineno, line) in contents.lines().enumerate() {
        // If we hit an exemption for the entire file, bail.
        if is_file_exempt(line) {
            return (0, contents.to_string());
        }

-        let mut codes: BTreeSet<&CheckCode> = BTreeSet::new();
+        let mut codes: FxHashSet<&CheckCode> = FxHashSet::default();
        for check in checks {
            if check.location.row() == lineno + 1 {
                codes.insert(check.kind.code());
@@ -117,7 +117,7 @@ fn add_noqa_inner(

        if !codes.is_empty() {
            let matches = matches_by_line.entry(noqa_lineno).or_default();
-            matches.append(&mut codes);
+            matches.extend(codes);
        }
    }

@@ -199,9 +199,9 @@ fn add_noqa_inner(

 #[cfg(test)]
 mod tests {
-    use std::collections::BTreeSet;

    use nohash_hasher::IntMap;
+    use rustc_hash::FxHashSet;
    use rustpython_parser::ast::Location;

    use crate::ast::types::Range;
@@ -227,7 +227,7 @@ mod tests {
        let checks = vec![];
        let contents = "x = 1";
        let noqa_line_for = IntMap::default();
-        let external = BTreeSet::default();
+        let external = FxHashSet::default();
        let (count, output) = add_noqa_inner(&checks, contents, &noqa_line_for, &external);
        assert_eq!(count, 0);
        assert_eq!(output.trim(), contents.trim());
@@ -241,7 +241,7 @@ mod tests {
        )];
        let contents = "x = 1";
        let noqa_line_for = IntMap::default();
-        let external = BTreeSet::default();
+        let external = FxHashSet::default();
        let (count, output) = add_noqa_inner(&checks, contents, &noqa_line_for, &external);
        assert_eq!(count, 1);
        assert_eq!(output.trim(), "x = 1  # noqa: F841".trim());
@@ -264,7 +264,7 @@ mod tests {
        ];
        let contents = "x = 1  # noqa: E741";
        let noqa_line_for = IntMap::default();
-        let external = BTreeSet::default();
+        let external = FxHashSet::default();
        let (count, output) = add_noqa_inner(&checks, contents, &noqa_line_for, &external);
        assert_eq!(count, 1);
        assert_eq!(output.trim(), "x = 1  # noqa: E741, F841".trim());
@@ -287,7 +287,7 @@ mod tests {
        ];
        let contents = "x = 1  # noqa";
        let noqa_line_for = IntMap::default();
-        let external = BTreeSet::default();
+        let external = FxHashSet::default();
        let (count, output) = add_noqa_inner(&checks, contents, &noqa_line_for, &external);
        assert_eq!(count, 1);
        assert_eq!(output.trim(), "x = 1  # noqa: E741, F841".trim());
--- a/src/pep8_naming/checks.rs
+++ b/src/pep8_naming/checks.rs
@@ -1,10 +1,10 @@
 use rustc_hash::{FxHashMap, FxHashSet};
 use rustpython_ast::{Arguments, Expr, ExprKind, Stmt};

+use crate::ast::function_type;
 use crate::ast::types::{Range, Scope, ScopeKind};
 use crate::checks::{Check, CheckKind};
 use crate::pep8_naming::helpers;
-use crate::pep8_naming::helpers::FunctionType;
 use crate::pep8_naming::settings::Settings;
 use crate::python::string::{self};

@@ -58,15 +58,16 @@ pub fn invalid_first_argument_name_for_class_method(
    settings: &Settings,
 ) -> Option<Check> {
    if !matches!(
-        helpers::function_type(
+        function_type::classify(
            scope,
            name,
            decorator_list,
            from_imports,
            import_aliases,
-            settings,
+            &settings.classmethod_decorators,
+            &settings.staticmethod_decorators,
        ),
-        FunctionType::ClassMethod
+        function_type::FunctionType::ClassMethod
    ) {
        return None;
    }
@@ -99,15 +100,16 @@ pub fn invalid_first_argument_name_for_method(
    settings: &Settings,
 ) -> Option<Check> {
    if !matches!(
-        helpers::function_type(
+        function_type::classify(
            scope,
            name,
            decorator_list,
            from_imports,
            import_aliases,
-            settings,
+            &settings.classmethod_decorators,
+            &settings.staticmethod_decorators,
        ),
-        FunctionType::Method
+        function_type::FunctionType::Method
    ) {
        return None;
    }
--- a/src/pep8_naming/helpers.rs
+++ b/src/pep8_naming/helpers.rs
@@ -1,71 +1,10 @@
 use itertools::Itertools;
 use rustc_hash::{FxHashMap, FxHashSet};
-use rustpython_ast::{Expr, Stmt, StmtKind};
+use rustpython_ast::{Stmt, StmtKind};

-use crate::ast::helpers::{
-    collect_call_paths, dealias_call_path, match_call_path, to_module_and_member,
-};
-use crate::ast::types::{Scope, ScopeKind};
-use crate::pep8_naming::settings::Settings;
+use crate::ast::helpers::{collect_call_paths, match_call_path};
 use crate::python::string::{is_lower, is_upper};

-const CLASS_METHODS: [&str; 3] = ["__new__", "__init_subclass__", "__class_getitem__"];
-const METACLASS_BASES: [(&str, &str); 2] = [("", "type"), ("abc", "ABCMeta")];
-
-pub enum FunctionType {
-    Function,
-    Method,
-    ClassMethod,
-    StaticMethod,
-}
-
-/// Classify a function based on its scope, name, and decorators.
-pub fn function_type(
-    scope: &Scope,
-    name: &str,
-    decorator_list: &[Expr],
-    from_imports: &FxHashMap<&str, FxHashSet<&str>>,
-    import_aliases: &FxHashMap<&str, &str>,
-    settings: &Settings,
-) -> FunctionType {
-    let ScopeKind::Class(scope) = &scope.kind else {
-        return FunctionType::Function;
-    };
-    // Special-case class method, like `__new__`.
-    if CLASS_METHODS.contains(&name)
-        || scope.bases.iter().any(|expr| {
-            // The class itself extends a known metaclass, so all methods are class methods.
-            let call_path = dealias_call_path(collect_call_paths(expr), import_aliases);
-            METACLASS_BASES
-                .iter()
-                .any(|(module, member)| match_call_path(&call_path, module, member, from_imports))
-        })
-        || decorator_list.iter().any(|expr| {
-            // The method is decorated with a class method decorator (like `@classmethod`).
-            let call_path = dealias_call_path(collect_call_paths(expr), import_aliases);
-            settings.classmethod_decorators.iter().any(|decorator| {
-                let (module, member) = to_module_and_member(decorator);
-                match_call_path(&call_path, module, member, from_imports)
-            })
-        })
-    {
-        FunctionType::ClassMethod
-    } else if decorator_list.iter().any(|expr| {
-        // The method is decorated with a static method decorator (like
-        // `@staticmethod`).
-        let call_path = dealias_call_path(collect_call_paths(expr), import_aliases);
-        settings.staticmethod_decorators.iter().any(|decorator| {
-            let (module, member) = to_module_and_member(decorator);
-            match_call_path(&call_path, module, member, from_imports)
-        })
-    }) {
-        FunctionType::StaticMethod
-    } else {
-        // It's an instance method.
-        FunctionType::Method
-    }
-}
-
 pub fn is_camelcase(name: &str) -> bool {
    !is_lower(name) && !is_upper(name) && !name.contains('_')
 }
--- a/src/printer.rs
+++ b/src/printer.rs
@@ -9,7 +9,7 @@ use itertools::iterate;
 use rustpython_parser::ast::Location;
 use serde::Serialize;

-use crate::autofix::Fix;
+use crate::autofix::{fixer, Fix};
 use crate::checks::CheckCode;
 use crate::fs::relativize_path;
 use crate::linter::Diagnostics;
@@ -57,15 +57,15 @@ impl<'a> Printer<'a> {
        }
    }

-    fn post_text(&self, num_fixable: usize) {
+    fn post_text(&self, num_fixable: usize, autofix: &fixer::Mode) {
        if self.log_level >= &LogLevel::Default {
-            if num_fixable > 0 {
+            if num_fixable > 0 && !matches!(autofix, fixer::Mode::Apply) {
                println!("{num_fixable} potentially fixable with the --fix option.");
            }
        }
    }

-    pub fn write_once(&self, diagnostics: &Diagnostics) -> Result<()> {
+    pub fn write_once(&self, diagnostics: &Diagnostics, autofix: &fixer::Mode) -> Result<()> {
        if matches!(self.log_level, LogLevel::Silent) {
            return Ok(());
        }
@@ -147,7 +147,7 @@ impl<'a> Printer<'a> {
                    print_message(message);
                }

-                self.post_text(num_fixable);
+                self.post_text(num_fixable, autofix);
            }
            SerializationFormat::Grouped => {
                self.pre_text(diagnostics);
@@ -190,7 +190,7 @@ impl<'a> Printer<'a> {
                    println!();
                }

-                self.post_text(num_fixable);
+                self.post_text(num_fixable, autofix);
            }
            SerializationFormat::Github => {
                self.pre_text(diagnostics);
--- a/src/pydocstyle/plugins.rs
+++ b/src/pydocstyle/plugins.rs
@@ -1,5 +1,3 @@
-use std::collections::BTreeSet;
-
 use itertools::Itertools;
 use once_cell::sync::Lazy;
 use regex::Regex;
@@ -7,8 +5,8 @@ use rustc_hash::FxHashSet;
 use rustpython_ast::{Constant, ExprKind, Location, StmtKind};

 use crate::ast::types::Range;
-use crate::ast::whitespace;
 use crate::ast::whitespace::LinesWithTrailingNewline;
+use crate::ast::{cast, whitespace};
 use crate::autofix::Fix;
 use crate::check_ast::Checker;
 use crate::checks::{Check, CheckCode, CheckKind};
@@ -77,7 +75,7 @@ pub fn not_missing(
            false
        }
        DefinitionKind::Function(stmt) | DefinitionKind::NestedFunction(stmt) => {
-            if is_overload(checker, stmt) {
+            if is_overload(checker, cast::decorator_list(stmt)) {
                true
            } else {
                if checker.settings.enabled.contains(&CheckCode::D103) {
@@ -90,7 +88,9 @@ pub fn not_missing(
            }
        }
        DefinitionKind::Method(stmt) => {
-            if is_overload(checker, stmt) || is_override(checker, stmt) {
+            if is_overload(checker, cast::decorator_list(stmt))
+                || is_override(checker, cast::decorator_list(stmt))
+            {
                true
            } else if is_magic(stmt) {
                if checker.settings.enabled.contains(&CheckCode::D105) {
@@ -916,7 +916,7 @@ pub fn if_needed(checker: &mut Checker, definition: &Definition) {
    ) = definition.kind else {
        return
    };
-    if !is_overload(checker, stmt) {
+    if !is_overload(checker, cast::decorator_list(stmt)) {
        return;
    }
    checker.add_check(Check::new(
@@ -1400,7 +1400,7 @@ fn missing_args(checker: &mut Checker, definition: &Definition, docstrings_args:
    };

    // Look for arguments that weren't included in the docstring.
-    let mut missing_arg_names: BTreeSet<String> = BTreeSet::default();
+    let mut missing_arg_names: FxHashSet<String> = FxHashSet::default();
    for arg in arguments
        .args
        .iter()
@@ -1410,7 +1410,7 @@ fn missing_args(checker: &mut Checker, definition: &Definition, docstrings_args:
            // If this is a non-static method, skip `cls` or `self`.
            usize::from(
                matches!(definition.kind, DefinitionKind::Method(_))
-                    && !is_staticmethod(checker, parent),
+                    && !is_staticmethod(checker, cast::decorator_list(parent)),
            ),
        )
    {
--- a/src/pyflakes/checks.rs
+++ b/src/pyflakes/checks.rs
@@ -7,7 +7,7 @@ use rustpython_parser::ast::{
    Arg, Arguments, Constant, Excepthandler, ExcepthandlerKind, Expr, ExprKind, Stmt, StmtKind,
 };

-use crate::ast::types::{BindingKind, FunctionScope, Range, Scope, ScopeKind};
+use crate::ast::types::{BindingKind, Range, Scope, ScopeKind};
 use crate::checks::{Check, CheckKind};
 use crate::pyflakes::cformat::CFormatSummary;
 use crate::pyflakes::format::FormatSummary;
@@ -391,13 +391,7 @@ pub fn undefined_local(scopes: &[&Scope], name: &str) -> Option<Check> {
 pub fn unused_variables(scope: &Scope, dummy_variable_rgx: &Regex) -> Vec<Check> {
    let mut checks: Vec<Check> = vec![];

-    if matches!(
-        scope.kind,
-        ScopeKind::Function(FunctionScope {
-            uses_locals: true,
-            ..
-        })
-    ) {
+    if scope.uses_locals && matches!(scope.kind, ScopeKind::Function(..)) {
        return checks;
    }

--- a/src/pylint/plugins/await_outside_async.rs
+++ b/src/pylint/plugins/await_outside_async.rs
@@ -1,6 +1,6 @@
 use rustpython_ast::Expr;

-use crate::ast::types::{FunctionScope, Range, ScopeKind};
+use crate::ast::types::{FunctionDef, Range, ScopeKind};
 use crate::check_ast::Checker;
 use crate::checks::CheckKind;
 use crate::Check;
@@ -10,7 +10,7 @@ pub fn await_outside_async(checker: &mut Checker, expr: &Expr) {
    if !checker
        .current_scopes()
        .find_map(|scope| {
-            if let ScopeKind::Function(FunctionScope { async_, .. }) = &scope.kind {
+            if let ScopeKind::Function(FunctionDef { async_, .. }) = &scope.kind {
                Some(*async_)
            } else {
                None
--- a/src/pylint/plugins/consider_merging_isinstance.rs
+++ b/src/pylint/plugins/consider_merging_isinstance.rs
@@ -8,12 +8,7 @@ use crate::checks::CheckKind;
 use crate::Check;

 /// PLR1701
-pub fn consider_merging_isinstance(
-    checker: &mut Checker,
-    expr: &Expr,
-    op: &Boolop,
-    values: &[Expr],
-) {
+pub fn merge_isinstance(checker: &mut Checker, expr: &Expr, op: &Boolop, values: &[Expr]) {
    if !matches!(op, Boolop::Or) || !checker.is_builtin("isinstance") {
        return;
    }
--- a/src/pylint/plugins/mod.rs
+++ b/src/pylint/plugins/mod.rs
@@ -1,19 +1,19 @@
 pub use await_outside_async::await_outside_async;
-pub use consider_merging_isinstance::consider_merging_isinstance;
-pub use consider_using_from_import::consider_using_from_import;
-pub use consider_using_sys_exit::consider_using_sys_exit;
+pub use merge_isinstance::merge_isinstance;
 pub use misplaced_comparison_constant::misplaced_comparison_constant;
 pub use property_with_parameters::property_with_parameters;
 pub use unnecessary_direct_lambda_call::unnecessary_direct_lambda_call;
+pub use use_from_import::use_from_import;
+pub use use_sys_exit::use_sys_exit;
 pub use useless_else_on_loop::useless_else_on_loop;
 pub use useless_import_alias::useless_import_alias;

 mod await_outside_async;
-mod consider_merging_isinstance;
-mod consider_using_from_import;
-mod consider_using_sys_exit;
+mod merge_isinstance;
 mod misplaced_comparison_constant;
 mod property_with_parameters;
 mod unnecessary_direct_lambda_call;
+mod use_from_import;
+mod use_sys_exit;
 mod useless_else_on_loop;
 mod useless_import_alias;
--- a/src/pylint/plugins/consider_using_from_import.rs
+++ b/src/pylint/plugins/consider_using_from_import.rs
@@ -6,7 +6,7 @@ use crate::checks::CheckKind;
 use crate::Check;

 /// PLR0402
-pub fn consider_using_from_import(checker: &mut Checker, alias: &Alias) {
+pub fn use_from_import(checker: &mut Checker, alias: &Alias) {
    let Some(asname) = &alias.node.asname else {
        return;
    };
--- a/src/pylint/plugins/consider_using_sys_exit.rs
+++ b/src/pylint/plugins/consider_using_sys_exit.rs
@@ -60,7 +60,7 @@ fn get_member_import_name_alias(checker: &Checker, module: &str, member: &str) -
 }

 /// RUF004
-pub fn consider_using_sys_exit(checker: &mut Checker, func: &Expr) {
+pub fn use_sys_exit(checker: &mut Checker, func: &Expr) {
    let ExprKind::Name { id, .. } = &func.node else {
        return;
    };
@@ -74,7 +74,10 @@ pub fn consider_using_sys_exit(checker: &mut Checker, func: &Expr) {
        if !checker.is_builtin(name) {
            continue;
        }
-        let mut check = Check::new(CheckKind::ConsiderUsingSysExit, Range::from_located(func));
+        let mut check = Check::new(
+            CheckKind::UseSysExit(name.to_string()),
+            Range::from_located(func),
+        );
        if checker.patch(check.kind.code()) {
            if let Some(content) = get_member_import_name_alias(checker, "sys", "exit") {
                check.amend(Fix::replacement(
--- a/src/pylint/snapshots/ruffpylinttests__PLR1722_consider_using_sys_exit_0.py.snap
+++ b/src/pylint/snapshots/ruffpylinttests__PLR1722_consider_using_sys_exit_0.py.snap
@@ -2,7 +2,8 @@
 source: src/pylint/mod.rs
 expression: checks
 ---
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: exit
  location:
    row: 1
    column: 0
@@ -10,7 +11,8 @@ expression: checks
    row: 1
    column: 4
  fix: ~
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: quit
  location:
    row: 2
    column: 0
@@ -18,7 +20,8 @@ expression: checks
    row: 2
    column: 4
  fix: ~
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: exit
  location:
    row: 6
    column: 4
@@ -26,7 +29,8 @@ expression: checks
    row: 6
    column: 8
  fix: ~
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: quit
  location:
    row: 7
    column: 4
--- a/src/pylint/snapshots/ruffpylinttests__PLR1722_consider_using_sys_exit_1.py.snap
+++ b/src/pylint/snapshots/ruffpylinttests__PLR1722_consider_using_sys_exit_1.py.snap
@@ -2,7 +2,8 @@
 source: src/pylint/mod.rs
 expression: checks
 ---
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: exit
  location:
    row: 3
    column: 0
@@ -17,7 +18,8 @@ expression: checks
    end_location:
      row: 3
      column: 4
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: quit
  location:
    row: 4
    column: 0
@@ -32,7 +34,8 @@ expression: checks
    end_location:
      row: 4
      column: 4
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: exit
  location:
    row: 8
    column: 4
@@ -47,7 +50,8 @@ expression: checks
    end_location:
      row: 8
      column: 8
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: quit
  location:
    row: 9
    column: 4
--- a/src/pylint/snapshots/ruffpylinttests__PLR1722_consider_using_sys_exit_2.py.snap
+++ b/src/pylint/snapshots/ruffpylinttests__PLR1722_consider_using_sys_exit_2.py.snap
@@ -2,7 +2,8 @@
 source: src/pylint/mod.rs
 expression: checks
 ---
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: exit
  location:
    row: 3
    column: 0
@@ -17,7 +18,8 @@ expression: checks
    end_location:
      row: 3
      column: 4
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: quit
  location:
    row: 4
    column: 0
@@ -32,7 +34,8 @@ expression: checks
    end_location:
      row: 4
      column: 4
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: exit
  location:
    row: 8
    column: 4
@@ -47,7 +50,8 @@ expression: checks
    end_location:
      row: 8
      column: 8
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: quit
  location:
    row: 9
    column: 4
--- a/src/pylint/snapshots/ruffpylinttests__PLR1722_consider_using_sys_exit_3.py.snap
+++ b/src/pylint/snapshots/ruffpylinttests__PLR1722_consider_using_sys_exit_3.py.snap
@@ -2,7 +2,8 @@
 source: src/pylint/mod.rs
 expression: checks
 ---
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: quit
  location:
    row: 4
    column: 0
@@ -17,7 +18,8 @@ expression: checks
    end_location:
      row: 4
      column: 4
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: quit
  location:
    row: 9
    column: 4
--- a/src/pylint/snapshots/ruffpylinttests__PLR1722_consider_using_sys_exit_4.py.snap
+++ b/src/pylint/snapshots/ruffpylinttests__PLR1722_consider_using_sys_exit_4.py.snap
@@ -2,7 +2,8 @@
 source: src/pylint/mod.rs
 expression: checks
 ---
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: exit
  location:
    row: 3
    column: 0
@@ -17,7 +18,8 @@ expression: checks
    end_location:
      row: 3
      column: 4
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: quit
  location:
    row: 4
    column: 0
@@ -32,7 +34,8 @@ expression: checks
    end_location:
      row: 4
      column: 4
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: exit
  location:
    row: 8
    column: 4
@@ -47,7 +50,8 @@ expression: checks
    end_location:
      row: 8
      column: 8
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: quit
  location:
    row: 9
    column: 4
--- a/src/pylint/snapshots/ruffpylinttests__PLR1722_consider_using_sys_exit_5.py.snap
+++ b/src/pylint/snapshots/ruffpylinttests__PLR1722_consider_using_sys_exit_5.py.snap
@@ -2,7 +2,8 @@
 source: src/pylint/mod.rs
 expression: checks
 ---
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: quit
  location:
    row: 4
    column: 0
@@ -17,7 +18,8 @@ expression: checks
    end_location:
      row: 4
      column: 4
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: quit
  location:
    row: 9
    column: 4
--- a/src/pylint/snapshots/ruffpylinttests__PLR1722_consider_using_sys_exit_6.py.snap
+++ b/src/pylint/snapshots/ruffpylinttests__PLR1722_consider_using_sys_exit_6.py.snap
@@ -2,7 +2,8 @@
 source: src/pylint/mod.rs
 expression: checks
 ---
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: exit
  location:
    row: 1
    column: 0
@@ -10,7 +11,8 @@ expression: checks
    row: 1
    column: 4
  fix: ~
- kind: ConsiderUsingSysExit
+- kind:
+    UseSysExit: quit
  location:
    row: 2
    column: 0
--- a/src/pyupgrade/plugins/unnecessary_future_import.rs
+++ b/src/pyupgrade/plugins/unnecessary_future_import.rs
@@ -1,6 +1,6 @@
-use std::collections::BTreeSet;
-
+use itertools::Itertools;
 use log::error;
+use rustc_hash::FxHashSet;
 use rustpython_ast::{AliasData, Located};
 use rustpython_parser::ast::Stmt;

@@ -38,7 +38,7 @@ pub fn unnecessary_future_import(checker: &mut Checker, stmt: &Stmt, names: &[Lo
    let target_version = checker.settings.target_version;

    let mut removable_index: Vec<usize> = vec![];
-    let mut removable_names: BTreeSet<&str> = BTreeSet::new();
+    let mut removable_names: FxHashSet<&str> = FxHashSet::default();
    for (index, alias) in names.iter().enumerate() {
        let name = alias.node.name.as_str();
        if (target_version >= PythonVersion::Py33 && PY33_PLUS_REMOVE_FUTURES.contains(&name))
@@ -53,7 +53,13 @@ pub fn unnecessary_future_import(checker: &mut Checker, stmt: &Stmt, names: &[Lo
        return;
    }
    let mut check = Check::new(
-        CheckKind::UnnecessaryFutureImport(removable_names.into_iter().map(String::from).collect()),
+        CheckKind::UnnecessaryFutureImport(
+            removable_names
+                .into_iter()
+                .map(String::from)
+                .sorted()
+                .collect(),
+        ),
        Range::from_located(stmt),
    );
    if checker.patch(check.kind.code()) {
--- a/src/settings/mod.rs
+++ b/src/settings/mod.rs
@@ -2,12 +2,12 @@
 //! command-line options. Structure is optimized for internal usage, as opposed
 //! to external visibility or parsing.

-use std::collections::BTreeSet;
 use std::hash::{Hash, Hasher};
 use std::path::{Path, PathBuf};

 use anyhow::Result;
 use globset::{Glob, GlobMatcher, GlobSet};
+use itertools::Itertools;
 use path_absolutize::path_dedot;
 use regex::Regex;
 use rustc_hash::FxHashSet;
@@ -34,12 +34,12 @@ pub struct Settings {
    pub enabled: FxHashSet<CheckCode>,
    pub exclude: GlobSet,
    pub extend_exclude: GlobSet,
-    pub external: BTreeSet<String>,
+    pub external: FxHashSet<String>,
    pub fixable: FxHashSet<CheckCode>,
    pub format: SerializationFormat,
    pub ignore_init_module_imports: bool,
    pub line_length: usize,
-    pub per_file_ignores: Vec<(GlobMatcher, GlobMatcher, BTreeSet<CheckCode>)>,
+    pub per_file_ignores: Vec<(GlobMatcher, GlobMatcher, FxHashSet<CheckCode>)>,
    pub show_source: bool,
    pub src: Vec<PathBuf>,
    pub target_version: PythonVersion,
@@ -77,7 +77,7 @@ impl Settings {
            ),
            exclude: resolve_globset(config.exclude, project_root)?,
            extend_exclude: resolve_globset(config.extend_exclude, project_root)?,
-            external: BTreeSet::from_iter(config.external),
+            external: FxHashSet::from_iter(config.external),
            fixable: resolve_codes(&config.fixable, &config.unfixable),
            format: config.format,
            flake8_annotations: config.flake8_annotations,
@@ -105,7 +105,7 @@ impl Settings {
            enabled: FxHashSet::from_iter([check_code.clone()]),
            exclude: GlobSet::empty(),
            extend_exclude: GlobSet::empty(),
-            external: BTreeSet::default(),
+            external: FxHashSet::default(),
            fixable: FxHashSet::from_iter([check_code]),
            format: SerializationFormat::Text,
            ignore_init_module_imports: false,
@@ -133,7 +133,7 @@ impl Settings {
            enabled: FxHashSet::from_iter(check_codes.clone()),
            exclude: GlobSet::empty(),
            extend_exclude: GlobSet::empty(),
-            external: BTreeSet::default(),
+            external: FxHashSet::default(),
            fixable: FxHashSet::from_iter(check_codes),
            format: SerializationFormat::Text,
            ignore_init_module_imports: false,
@@ -162,18 +162,23 @@ impl Hash for Settings {
            confusable.hash(state);
        }
        self.dummy_variable_rgx.as_str().hash(state);
-        for value in &self.enabled {
+        for value in self.enabled.iter().sorted() {
            value.hash(state);
        }
-        self.external.hash(state);
-        for value in &self.fixable {
+        for value in self.external.iter().sorted() {
            value.hash(state);
        }
+        for value in self.fixable.iter().sorted() {
+            value.hash(state);
+        }
+        self.ignore_init_module_imports.hash(state);
        self.line_length.hash(state);
        for (absolute, basename, codes) in &self.per_file_ignores {
            absolute.glob().hash(state);
            basename.glob().hash(state);
-            codes.hash(state);
+            for value in codes.iter().sorted() {
+                value.hash(state);
+            }
        }
        self.show_source.hash(state);
        self.target_version.hash(state);
@@ -206,7 +211,7 @@ pub fn resolve_globset(
 pub fn resolve_per_file_ignores(
    per_file_ignores: Vec<PerFileIgnore>,
    project_root: Option<&PathBuf>,
-) -> Result<Vec<(GlobMatcher, GlobMatcher, BTreeSet<CheckCode>)>> {
+) -> Result<Vec<(GlobMatcher, GlobMatcher, FxHashSet<CheckCode>)>> {
    per_file_ignores
        .into_iter()
        .map(|per_file_ignore| {
--- a/src/settings/options.rs
+++ b/src/settings/options.rs
@@ -125,7 +125,7 @@ pub struct Options {
    pub fix: Option<bool>,
    #[option(
        doc = "A list of check code prefixes to consider autofix-able.",
-        default = r#"["A", "ANN", "B", "BLE", "C", "D", "E", "F", "FBT", "I", "M", "N", "Q", "RUF", "S", "T", "U", "W", "YTT"]"#,
+        default = r#"["A", "ANN", "ARG", "B", "BLE", "C", "D", "E", "ERA", "F", "FBT", "I", "ICN", "N", "PGH", "PLC", "PLE", "PLR", "PLW", "Q", "RET", "RUF", "S", "T", "TID", "UP", "W", "YTT"]"#,
        value_type = "Vec<CheckCodePrefix>",
        example = r#"
            # Only allow autofix behavior for `E` and `F` checks.
--- a/src/settings/pyproject.rs
+++ b/src/settings/pyproject.rs
@@ -96,7 +96,6 @@ pub fn load_options(pyproject: Option<&PathBuf>) -> Result<Options> {

 #[cfg(test)]
 mod tests {
-    use std::collections::BTreeMap;
    use std::env::current_dir;
    use std::path::PathBuf;
    use std::str::FromStr;
@@ -432,8 +431,11 @@ other-attribute = 1
                    ban_relative_imports: Some(Strictness::Parents)
                }),
                flake8_import_conventions: Some(flake8_import_conventions::settings::Options {
-                    aliases: Some(BTreeMap::from([("pandas".to_string(), "pd".to_string(),)])),
-                    extend_aliases: Some(BTreeMap::from([(
+                    aliases: Some(FxHashMap::from_iter([(
+                        "pandas".to_string(),
+                        "pd".to_string(),
+                    )])),
+                    extend_aliases: Some(FxHashMap::from_iter([(
                        "dask.dataframe".to_string(),
                        "dd".to_string(),
                    )])),
--- a/src/settings/types.rs
+++ b/src/settings/types.rs
@@ -1,4 +1,3 @@
-use std::collections::BTreeSet;
 use std::env;
 use std::hash::Hash;
 use std::path::{Path, PathBuf};
@@ -7,6 +6,7 @@ use std::str::FromStr;
 use anyhow::{anyhow, bail, Result};
 use clap::ValueEnum;
 use globset::{Glob, GlobSetBuilder};
+use rustc_hash::FxHashSet;
 use serde::{de, Deserialize, Deserializer, Serialize};

 use crate::checks::CheckCode;
@@ -89,10 +89,10 @@ impl FromStr for FilePattern {
    }
 }

-#[derive(Debug, Clone, Hash)]
+#[derive(Debug, Clone)]
 pub struct PerFileIgnore {
    pub pattern: String,
-    pub codes: BTreeSet<CheckCode>,
+    pub codes: FxHashSet<CheckCode>,
 }

 impl PerFileIgnore {
--- a/src/visibility.rs
+++ b/src/visibility.rs
@@ -3,7 +3,7 @@

 use std::path::Path;

-use rustpython_ast::{Stmt, StmtKind};
+use rustpython_ast::{Expr, Stmt, StmtKind};

 use crate::ast::helpers::match_module_member;
 use crate::check_ast::Checker;
@@ -29,59 +29,56 @@ pub struct VisibleScope {
 }

 /// Returns `true` if a function is a "static method".
-pub fn is_staticmethod(checker: &Checker, stmt: &Stmt) -> bool {
-    match &stmt.node {
-        StmtKind::FunctionDef { decorator_list, .. }
-        | StmtKind::AsyncFunctionDef { decorator_list, .. } => decorator_list.iter().any(|expr| {
-            match_module_member(
-                expr,
-                "",
-                "staticmethod",
-                &checker.from_imports,
-                &checker.import_aliases,
-            )
-        }),
-        _ => panic!("Found non-FunctionDef in is_staticmethod"),
-    }
+pub fn is_staticmethod(checker: &Checker, decorator_list: &[Expr]) -> bool {
+    decorator_list.iter().any(|expr| {
+        match_module_member(
+            expr,
+            "",
+            "staticmethod",
+            &checker.from_imports,
+            &checker.import_aliases,
+        )
+    })
 }

 /// Returns `true` if a function is a "class method".
-pub fn is_classmethod(checker: &Checker, stmt: &Stmt) -> bool {
-    match &stmt.node {
-        StmtKind::FunctionDef { decorator_list, .. }
-        | StmtKind::AsyncFunctionDef { decorator_list, .. } => decorator_list.iter().any(|expr| {
-            match_module_member(
-                expr,
-                "",
-                "classmethod",
-                &checker.from_imports,
-                &checker.import_aliases,
-            )
-        }),
-        _ => panic!("Found non-FunctionDef in is_classmethod"),
-    }
+pub fn is_classmethod(checker: &Checker, decorator_list: &[Expr]) -> bool {
+    decorator_list.iter().any(|expr| {
+        match_module_member(
+            expr,
+            "",
+            "classmethod",
+            &checker.from_imports,
+            &checker.import_aliases,
+        )
+    })
 }

 /// Returns `true` if a function definition is an `@overload`.
-pub fn is_overload(checker: &Checker, stmt: &Stmt) -> bool {
-    match &stmt.node {
-        StmtKind::FunctionDef { decorator_list, .. }
-        | StmtKind::AsyncFunctionDef { decorator_list, .. } => decorator_list
-            .iter()
-            .any(|expr| checker.match_typing_expr(expr, "overload")),
-        _ => panic!("Found non-FunctionDef in is_overload"),
-    }
+pub fn is_overload(checker: &Checker, decorator_list: &[Expr]) -> bool {
+    decorator_list
+        .iter()
+        .any(|expr| checker.match_typing_expr(expr, "overload"))
 }

 /// Returns `true` if a function definition is an `@override` (PEP 698).
-pub fn is_override(checker: &Checker, stmt: &Stmt) -> bool {
-    match &stmt.node {
-        StmtKind::FunctionDef { decorator_list, .. }
-        | StmtKind::AsyncFunctionDef { decorator_list, .. } => decorator_list
-            .iter()
-            .any(|expr| checker.match_typing_expr(expr, "override")),
-        _ => panic!("Found non-FunctionDef in is_override"),
-    }
+pub fn is_override(checker: &Checker, decorator_list: &[Expr]) -> bool {
+    decorator_list
+        .iter()
+        .any(|expr| checker.match_typing_expr(expr, "override"))
+}
+
+/// Returns `true` if a function definition is an `@abstractmethod`.
+pub fn is_abstract(checker: &Checker, decorator_list: &[Expr]) -> bool {
+    decorator_list.iter().any(|expr| {
+        match_module_member(
+            expr,
+            "abc",
+            "abstractmethod",
+            &checker.from_imports,
+            &checker.import_aliases,
+        )
+    })
 }

 /// Returns `true` if a function is a "magic method".
Author	SHA1	Message	Date
Charlie Marsh	a710e35ebc	Bump version to 0.0.170	2022-12-08 11:36:24 -05:00
Charlie Marsh	49df43bb78	Use single newlines in .pyi import sorting (#1142 )	2022-12-08 11:34:41 -05:00
Charlie Marsh	e338d9acbe	Remove 'consider' language from check messages (#1135 )	2022-12-07 20:10:36 -05:00
Charlie Marsh	5c8655f479	Bump ruff_macros to 0.0.169	2022-12-07 19:10:16 -05:00
Charlie Marsh	60987888a2	Re-increase max iterations to 100	2022-12-07 19:10:03 -05:00
Charlie Marsh	a81581c781	Bump ruff_macros to 0.0.168	2022-12-07 19:08:18 -05:00
Charlie Marsh	3152dd7a8e	Don't prompt users to --fix if they ran with --fix (#1133 )	2022-12-07 19:07:51 -05:00
Charlie Marsh	528416f07a	Rename I252 to TID252; add redirects for all renamed codes (#1129 )	2022-12-07 15:12:22 -05:00
Charlie Marsh	4405a6a903	Bump version to 0.0.168	2022-12-07 13:18:40 -05:00
Charlie Marsh	35fa2a3c32	Convert more BTree usages to Fx (#1112 )	2022-12-07 12:21:12 -05:00
Charlie Marsh	bb67fbb73a	Implement unused argument detection (`ARG`) (#1126 ) Detect unused arguments	2022-12-07 12:15:41 -05:00