Bump version to 0.0.92

Remove RustPython fork (#523 )
Move SourceCodeLocator to its own module (#522 )
2022-10-30 18:04:30 -04:00 · 2022-10-30 18:04:05 -04:00 · 2022-10-30 15:51:59 -04:00 · 2022-10-30 13:50:42 -04:00 · 2022-10-30 13:13:37 -04:00 · 2022-10-30 13:11:08 -04:00
211 changed files with 3574 additions and 2462 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: v0.0.87
+    rev: v0.0.92
    hooks:
      - id: ruff

--- a/Cargo.lock
+++ b/Cargo.lock
@@ -37,6 +37,12 @@ dependencies = [
 "libc",
 ]

+[[package]]
+name = "anes"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4b46cbb362ab8752921c97e041f5e366ee6297bd428a31275b9fcf1e380f7299"
+
 [[package]]
 name = "annotate-snippets"
 version = "0.6.1"
@@ -368,6 +374,12 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c1db59621ec70f09c5e9b597b220c7a2b43611f4710dc03ceb8748637775692c"

+[[package]]
+name = "cast"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"
+
 [[package]]
 name = "cc"
 version = "1.0.73"
@@ -416,6 +428,45 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fff857943da45f546682664a79488be82e69e43c1a7a2307679ab9afb3a66d2e"

+[[package]]
+name = "ciborium"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b0c137568cc60b904a7724001b35ce2630fd00d5d84805fbb608ab89509d788f"
+dependencies = [
+ "ciborium-io",
+ "ciborium-ll",
+ "serde",
+]
+
+[[package]]
+name = "ciborium-io"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "346de753af073cc87b52b2083a506b38ac176a44cfb05497b622e27be899b369"
+
+[[package]]
+name = "ciborium-ll"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "213030a2b5a4e0c0892b6652260cf6ccac84827b83a85a534e178e3906c4cf1b"
+dependencies = [
+ "ciborium-io",
+ "half",
+]
+
+[[package]]
+name = "clap"
+version = "3.2.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "71655c45cb9845d3270c9d6df84ebe72b4dad3c2ba3f7023ad47c144e4e473a5"
+dependencies = [
+ "bitflags",
+ "clap_lex 0.2.4",
+ "indexmap",
+ "textwrap 0.16.0",
+]
+
 [[package]]
 name = "clap"
 version = "4.0.15"
@@ -425,7 +476,7 @@ dependencies = [
 "atty",
 "bitflags",
 "clap_derive",
- "clap_lex",
+ "clap_lex 0.3.0",
 "once_cell",
 "strsim",
 "termcolor",
@@ -444,6 +495,15 @@ dependencies = [
 "syn",
 ]

+[[package]]
+name = "clap_lex"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2850f2f5a82cbf437dd5af4d49848fbdfc27c157c3d010345776f952765261c5"
+dependencies = [
+ "os_str_bytes",
+]
+
 [[package]]
 name = "clap_lex"
 version = "0.3.0"
@@ -548,6 +608,42 @@ dependencies = [
 "cfg-if 1.0.0",
 ]

+[[package]]
+name = "criterion"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7c76e09c1aae2bc52b3d2f29e13c6572553b30c4aa1b8a49fd70de6412654cb"
+dependencies = [
+ "anes",
+ "atty",
+ "cast",
+ "ciborium",
+ "clap 3.2.23",
+ "criterion-plot",
+ "itertools",
+ "lazy_static",
+ "num-traits",
+ "oorandom",
+ "plotters",
+ "rayon",
+ "regex",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "tinytemplate",
+ "walkdir",
+]
+
+[[package]]
+name = "criterion-plot"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6b50826342786a51a89e2da3a28f1c32b06e387201bc2d19791f622c673706b1"
+dependencies = [
+ "cast",
+ "itertools",
+]
+
 [[package]]
 name = "crossbeam-channel"
 version = "0.5.6"
@@ -1041,6 +1137,12 @@ dependencies = [
 "wasm-bindgen",
 ]

+[[package]]
+name = "half"
+version = "1.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eabb4a44450da02c90444cf74558da904edde8fb4e9035a9a6a4e15445af0bd7"
+
 [[package]]
 name = "hashbrown"
 version = "0.12.3"
@@ -1571,6 +1673,12 @@ version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e82dad04139b71a90c080c8463fe0dc7902db5192d939bd0950f074d014339e1"

+[[package]]
+name = "oorandom"
+version = "11.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ab1bc2a289d34bd04a330323ac98a1b4bc82c9d9fcb1e66b63caa84da26b575"
+
 [[package]]
 name = "opaque-debug"
 version = "0.2.3"
@@ -1779,6 +1887,34 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"

+[[package]]
+name = "plotters"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2538b639e642295546c50fcd545198c9d64ee2a38620a628724a3b266d5fbf97"
+dependencies = [
+ "num-traits",
+ "plotters-backend",
+ "plotters-svg",
+ "wasm-bindgen",
+ "web-sys",
+]
+
+[[package]]
+name = "plotters-backend"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "193228616381fecdc1224c62e96946dfbc73ff4384fba576e052ff8c1bea8142"
+
+[[package]]
+name = "plotters-svg"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f9a81d2759aae1dae668f783c308bc5c8ebd191ff4184aaa1b37f65a6ae5a56f"
+dependencies = [
+ "plotters-backend",
+]
+
 [[package]]
 name = "polling"
 version = "2.3.0"
@@ -2054,18 +2190,19 @@ dependencies = [

 [[package]]
 name = "ruff"
-version = "0.0.87"
+version = "0.0.92"
 dependencies = [
 "anyhow",
 "assert_cmd",
 "bincode",
 "cacache",
 "chrono",
- "clap",
+ "clap 4.0.15",
 "clearscreen",
 "codegen",
 "colored",
 "common-path",
+ "criterion",
 "dirs 4.0.0",
 "fern",
 "filetime",
@@ -2089,7 +2226,7 @@ dependencies = [
 "strum",
 "strum_macros",
 "test-case",
- "textwrap",
+ "textwrap 0.15.1",
 "titlecase",
 "toml",
 "update-informer",
@@ -2111,7 +2248,7 @@ dependencies = [
 [[package]]
 name = "rustpython-ast"
 version = "0.1.0"
-source = "git+https://github.com/charliermarsh/RustPython.git?rev=1b253a12705f84972cd76e8dc1cdaaccb233e5a5#1b253a12705f84972cd76e8dc1cdaaccb233e5a5"
+source = "git+https://github.com/RustPython/RustPython.git?rev=77b821a1941019fe34f73ce17cea013ae1b98fd0#77b821a1941019fe34f73ce17cea013ae1b98fd0"
 dependencies = [
 "num-bigint",
 "rustpython-common",
@@ -2121,7 +2258,7 @@ dependencies = [
 [[package]]
 name = "rustpython-common"
 version = "0.0.0"
-source = "git+https://github.com/charliermarsh/RustPython.git?rev=1b253a12705f84972cd76e8dc1cdaaccb233e5a5#1b253a12705f84972cd76e8dc1cdaaccb233e5a5"
+source = "git+https://github.com/RustPython/RustPython.git?rev=77b821a1941019fe34f73ce17cea013ae1b98fd0#77b821a1941019fe34f73ce17cea013ae1b98fd0"
 dependencies = [
 "ascii",
 "cfg-if 1.0.0",
@@ -2144,7 +2281,7 @@ dependencies = [
 [[package]]
 name = "rustpython-compiler-core"
 version = "0.1.2"
-source = "git+https://github.com/charliermarsh/RustPython.git?rev=1b253a12705f84972cd76e8dc1cdaaccb233e5a5#1b253a12705f84972cd76e8dc1cdaaccb233e5a5"
+source = "git+https://github.com/RustPython/RustPython.git?rev=77b821a1941019fe34f73ce17cea013ae1b98fd0#77b821a1941019fe34f73ce17cea013ae1b98fd0"
 dependencies = [
 "bincode",
 "bitflags",
@@ -2161,7 +2298,7 @@ dependencies = [
 [[package]]
 name = "rustpython-parser"
 version = "0.1.2"
-source = "git+https://github.com/charliermarsh/RustPython.git?rev=1b253a12705f84972cd76e8dc1cdaaccb233e5a5#1b253a12705f84972cd76e8dc1cdaaccb233e5a5"
+source = "git+https://github.com/RustPython/RustPython.git?rev=77b821a1941019fe34f73ce17cea013ae1b98fd0#77b821a1941019fe34f73ce17cea013ae1b98fd0"
 dependencies = [
 "ahash",
 "anyhow",
@@ -2549,6 +2686,12 @@ dependencies = [
 "unicode-width",
 ]

+[[package]]
+name = "textwrap"
+version = "0.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "222a222a5bfe1bba4a77b45ec488a741b3cb8872e5e499451fd7d0129c9c7c3d"
+
 [[package]]
 name = "thiserror"
 version = "1.0.37"
@@ -2589,6 +2732,16 @@ dependencies = [
 "crunchy",
 ]

+[[package]]
+name = "tinytemplate"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be4d6b5f19ff7664e8c98d03e2139cb510db9b0a60b55f8e8709b689d939b6bc"
+dependencies = [
+ "serde",
+ "serde_json",
+]
+
 [[package]]
 name = "tinyvec"
 version = "1.6.0"
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ruff"
-version = "0.0.87"
+version = "0.0.92"
 edition = "2021"

 [lib]
@@ -26,9 +26,9 @@ once_cell = { version = "1.13.1" }
 path-absolutize = { version = "3.0.14", features = ["once_cell_cache", "use_unix_paths_on_wasm"] }
 rayon = { version = "1.5.3" }
 regex = { version = "1.6.0" }
-rustpython-ast = { features = ["unparse"], git = "https://github.com/charliermarsh/RustPython.git", rev = "1b253a12705f84972cd76e8dc1cdaaccb233e5a5" }
-rustpython-common = { git = "https://github.com/charliermarsh/RustPython.git", rev = "1b253a12705f84972cd76e8dc1cdaaccb233e5a5" }
-rustpython-parser = { features = ["lalrpop"], git = "https://github.com/charliermarsh/RustPython.git", rev = "1b253a12705f84972cd76e8dc1cdaaccb233e5a5" }
+rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "77b821a1941019fe34f73ce17cea013ae1b98fd0" }
+rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "77b821a1941019fe34f73ce17cea013ae1b98fd0" }
+rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "77b821a1941019fe34f73ce17cea013ae1b98fd0" }
 serde = { version = "1.0.143", features = ["derive"] }
 serde_json = { version = "1.0.83" }
 strum = { version = "0.24.1", features = ["strum_macros"] }
@@ -51,6 +51,7 @@ getrandom = { version = "0.2.7", features = ["js"] }
 [dev-dependencies]
 assert_cmd = { version = "2.0.4" }
 codegen = { version = "0.2.0" }
+criterion = { version = "0.4.0" }
 insta = { version = "1.19.1", features = ["yaml"] }
 test-case = { version = "2.2.2" }

@@ -69,3 +70,7 @@ opt-level = 3

 [profile.dev.package.similar]
 opt-level = 3
+
+[[bench]]
+name = "source_code_locator"
+harness = false
--- a/README.md
+++ b/README.md
@@ -38,13 +38,25 @@ Read the [launch blog post](https://notes.crmarsh.com/python-tooling-could-be-mu
 1. [Installation and Usage](#installation-and-usage)
 2. [Configuration](#configuration)
 3. [Supported Rules](#supported-rules)
-4. [Editor Integrations](#editor-integrations)
-5. [FAQ](#faq)
-6. [Development](#development)
-7. [Releases](#releases)
-8. [Benchmarks](#benchmarks)
-9. [License](#license)
-10. [Contributing](#contributing)
+   1. [Pyflakes](#pyflakes)
+   2. [pycodestyle (error)](#pycodestyle-error)
+   3. [pycodestyle (warning)](#pycodestyle-warning)
+   4. [pydocstyle](#pydocstyle)
+   5. [pyupgrade](#pyupgrade)
+   6. [pep8-naming](#pep8-naming)
+   7. [flake8-comprehensions](#flake8-comprehensions)
+   8. [flake8-bugbear](#flake8-bugbear)
+   9. [flake8-builtins](#flake8-builtins)
+   10. [flake8-print](#flake8-print)
+   11. [flake8-quotes](#flake8-quotes)
+   12. [Meta rules](#meta-rules)
+5. [Editor Integrations](#editor-integrations)
+6. [FAQ](#faq)
+7. [Development](#development)
+8. [Releases](#releases)
+9. [Benchmarks](#benchmarks)
+10. [License](#license)
+11. [Contributing](#contributing)

 ## Installation and Usage

@@ -77,7 +89,7 @@ Ruff also works with [pre-commit](https://pre-commit.com):
 ```yaml
 repos:
  - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.0.87
+    rev: v0.0.92
    hooks:
      - id: ruff
 ```
@@ -94,10 +106,8 @@ For example, you could configure Ruff to only enforce a subset of rules with:
 ```toml
 [tool.ruff]
 line-length = 88
-select = [
-    "F401",
-    "F403",
-]
+select = ["E", "F"]
+ignore = ["E501"]
 per-file-ignores = [
    "__init__.py:F401",
    "path/to/file.py:F401"
@@ -236,8 +246,7 @@ add `noqa` directives to all failing lines, with the appropriate error codes.**

 ## Supported Rules

-By default, Ruff enables all `E`, `W`, and `F` error codes, which correspond to those built-in to
-Flake8.
+By default, Ruff enables all `E` and `F` error codes, which correspond to those built-in to Flake8.

 The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` command-line option.

@@ -263,7 +272,7 @@ The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` com
 | F634 | IfTuple | If test is a tuple, which is always `True` |  |
 | F701 | BreakOutsideLoop | `break` outside loop |  |
 | F702 | ContinueOutsideLoop | `continue` not properly in loop |  |
-| F704 | YieldOutsideFunction | `yield` or `yield from` statement outside of a function/method |  |
+| F704 | YieldOutsideFunction | `yield` or `yield from` statement outside of a function |  |
 | F706 | ReturnOutsideFunction | `return` statement outside of a function/method |  |
 | F707 | DefaultExceptNotLast | An `except:` block as not the last exception handler |  |
 | F722 | ForwardAnnotationSyntaxError | Syntax error in forward annotation: `...` |  |
@@ -332,7 +341,7 @@ The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` com
 | D400 | EndsInPeriod | First line should end with a period |  |
 | D402 | NoSignature | First line should not be the function's signature |  |
 | D403 | FirstLineCapitalized | First word of the first line should be properly capitalized |  |
-| D404 | NoThisPrefix | First word of the docstring should not be `This` |  |
+| D404 | NoThisPrefix | First word of the docstring should not be 'This' |  |
 | D405 | CapitalizeSectionName | Section name should be properly capitalized ("returns") | 🛠 |
 | D406 | NewLineAfterSectionName | Section name should end with a newline ("Returns") | 🛠 |
 | D407 | DashedUnderlineAfterSection | Missing dashed underline after section ("Returns") | 🛠 |
@@ -346,7 +355,7 @@ The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` com
 | D415 | EndsInPunctuation | First line should end with a period, question mark, or exclamation point |  |
 | D416 | SectionNameEndsInColon | Section name should end with a colon ("Returns") | 🛠 |
 | D417 | DocumentAllArguments | Missing argument descriptions in the docstring: `x`, `y` |  |
-| D418 | SkipDocstring | Function decorated with @overload shouldn't contain a docstring |  |
+| D418 | SkipDocstring | Function decorated with `@overload` shouldn't contain a docstring |  |
 | D419 | NonEmpty | Docstring is empty |  |

 ### pyupgrade
@@ -371,12 +380,16 @@ The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` com
 | N803 | InvalidArgumentName | Argument name `...` should be lowercase |  |
 | N804 | InvalidFirstArgumentNameForClassMethod | First argument of a class method should be named `cls` |  |
 | N805 | InvalidFirstArgumentNameForMethod | First argument of a method should be named `self` |  |
+| N806 | NonLowercaseVariableInFunction | Variable `...` in function should be lowercase |  |
 | N807 | DunderFunctionName | Function name should not start and end with `__` |  |
 | N811 | ConstantImportedAsNonConstant | Constant `...` imported as non-constant `...` |  |
 | N812 | LowercaseImportedAsNonLowercase | Lowercase `...` imported as non-lowercase `...` |  |
 | N813 | CamelcaseImportedAsLowercase | Camelcase `...` imported as lowercase `...` |  |
 | N814 | CamelcaseImportedAsConstant | Camelcase `...` imported as constant `...` |  |
+| N815 | MixedCaseVariableInClassScope | Variable `mixedCase` in class scope should not be mixedCase |  |
+| N816 | MixedCaseVariableInGlobalScope | Variable `mixedCase` in global scope should not be mixedCase |  |
 | N817 | CamelcaseImportedAsAcronym | Camelcase `...` imported as acronym `...` |  |
+| N818 | ErrorSuffixOnExceptionName | Exception name `...` should be named with an Error suffix |  |

 ### flake8-comprehensions

@@ -396,7 +409,7 @@ The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` com
 | C413 | UnnecessaryCallAroundSorted | Unnecessary `(list\|reversed)` call around `sorted()` |  |
 | C414 | UnnecessaryDoubleCastOrProcess | Unnecessary `(list\|reversed\|set\|sorted\|tuple)` call within `(list\|set\|sorted\|tuple)()` |  |
 | C415 | UnnecessarySubscriptReversal | Unnecessary subscript reversal of iterable within `(reversed\|set\|sorted)()` |  |
-| C416 | UnnecessaryComprehension |  Unnecessary `(list\|set)` comprehension (rewrite using `(list\|set)()`) |  |
+| C416 | UnnecessaryComprehension | Unnecessary `(list\|set)` comprehension (rewrite using `(list\|set)()`) |  |
 | C417 | UnnecessaryMap | Unnecessary `map` usage (rewrite using a `(list\|set\|dict)` comprehension) |  |

 ### flake8-bugbear
@@ -404,8 +417,10 @@ The 🛠 emoji indicates that a rule is automatically fixable by the `--fix` com
 | Code | Name | Message | Fix |
 | ---- | ---- | ------- | --- |
 | B002 | UnaryPrefixIncrement | Python does not support the unary prefix increment. |  |
+| B006 | MutableArgumentDefault | Do not use mutable data structures for argument defaults. |  |
 | B007 | UnusedLoopControlVariable | Loop control variable `i` not used within the loop body. | 🛠 |
 | B011 | DoNotAssertFalse | Do not `assert False` (`python -O` removes these calls), raise `AssertionError()` | 🛠 |
+| B013 | RedundantTupleInExceptionHandler | A length-one tuple literal is redundant. Write `except ValueError:` instead of `except (ValueError,):`. |  |
 | B014 | DuplicateHandlerException | Exception handler with duplicate exception: `ValueError` | 🛠 |
 | B017 | NoAssertRaisesException | `assertRaises(Exception):` should be considered evil. |  |
 | B025 | DuplicateTryBlockException | try-except block with duplicate exception `Exception` |  |
@@ -500,6 +515,7 @@ Ruff re-implements some of the most popular Flake8 plugins and related code qual
 including:

 - [`pydocstyle`](https://pypi.org/project/pydocstyle/)
+- [`pep8-naming`](https://pypi.org/project/pep8-naming/)
 - [`yesqa`](https://github.com/asottile/yesqa)
 - [`flake8-docstrings`](https://pypi.org/project/flake8-docstrings/)
 - [`flake8-builtins`](https://pypi.org/project/flake8-builtins/)
@@ -507,7 +523,7 @@ including:
 - [`flake8-print`](https://pypi.org/project/flake8-print/)
 - [`flake8-quotes`](https://pypi.org/project/flake8-quotes/)
 - [`flake8-comprehensions`](https://pypi.org/project/flake8-comprehensions/)
- [`flake8-bugbear`](https://pypi.org/project/flake8-bugbear/) (9/32)
+- [`flake8-bugbear`](https://pypi.org/project/flake8-bugbear/) (10/32)
 - [`pyupgrade`](https://pypi.org/project/pyupgrade/) (8/34)
 - [`autoflake`](https://pypi.org/project/autoflake/) (1/7)

@@ -522,13 +538,14 @@ Beyond rule-set parity, Ruff suffers from the following limitations vis-à-vis F

 Today, Ruff can be used to replace Flake8 when used with any of the following plugins:

+- [`pep8-naming`](https://pypi.org/project/pep8-naming/)
 - [`flake8-docstrings`](https://pypi.org/project/flake8-docstrings/)
 - [`flake8-builtins`](https://pypi.org/project/flake8-builtins/)
 - [`flake8-super`](https://pypi.org/project/flake8-super/)
 - [`flake8-print`](https://pypi.org/project/flake8-print/)
 - [`flake8-quotes`](https://pypi.org/project/flake8-quotes/)
 - [`flake8-comprehensions`](https://pypi.org/project/flake8-comprehensions/)
- [`flake8-bugbear`](https://pypi.org/project/flake8-bugbear/) (9/32)
+- [`flake8-bugbear`](https://pypi.org/project/flake8-bugbear/) (10/32)

 Ruff also implements the functionality that you get from [`yesqa`](https://github.com/asottile/yesqa),
 and a subset of the rules implemented in [`pyupgrade`](https://pypi.org/project/pyupgrade/) (8/34).
@@ -557,35 +574,55 @@ Yes! To enable a specific docstring convention, start by enabling all `pydocstyl
 then selectively disabling based on your [preferred convention](https://www.pydocstyle.org/en/latest/error_codes.html#default-conventions).

 For example, if you're coming from `flake8-docstrings`, the following configuration is equivalent to
-`--docstring-convention numpy`:
+`--docstring-convention=numpy`:

 ```toml
 [tool.ruff]
-extend-select = [
-    "D100",
-    "D101",
-    "D102",
-    "D103",
-    "D104",
-    "D105",
-    "D106",
-    "D200",
-    "D201",
-    "D202",
+extend-select = ["D"]
+extend-ignore = [
+    "D107",
+    "D203",
+    "D212",
+    "D213",
+    "D402",
+    "D413",
+    "D415",
+    "D416",
+    "D417",
+]
+```
+
+Similarly, the following is equivalent to `--docstring-convention=google`:
+
+```toml
+[tool.ruff]
+extend-select = ["D"]
+extend-ignore = [
+    "D203",
    "D204",
-    "D205",
-    "D206",
-    "D207",
-    "D208",
-    "D209",
-    "D210",
-    "D211",
+    "D213",
+    "D215",
+    "D400",
+    "D404",
+    "D406",
+    "D407",
+    "D408",
+    "D409",
+    "D413",
+]
+```
+
+Similarly, the following is equivalent to `--docstring-convention=pep8`:
+
+```toml
+[tool.ruff]
+extend-select = ["D"]
+extend-ignore = [
+    "D203",
+    "D212",
+    "D213",
    "D214",
    "D215",
-    "D300",
-    "D400",
-    "D402",
-    "D403",
    "D404",
    "D405",
    "D406",
@@ -594,51 +631,10 @@ extend-select = [
    "D409",
    "D410",
    "D411",
-    "D412",
    "D413",
-    "D418",
-    "D419",
-]
-```
-
-Similarly, the following is equivalent to `--docstring-convention google`:
-
-```toml
-[tool.ruff]
-extend-select = [
-    "D100",
-    "D101",
-    "D102",
-    "D103",
-    "D104",
-    "D105",
-    "D106",
-    "D107",
-    "D200",
-    "D201",
-    "D202",
-    "D205",
-    "D206",
-    "D207",
-    "D208",
-    "D209",
-    "D210",
-    "D211",
-    "D212",
-    "D214",
-    "D300",
-    "D402",
-    "D403",
-    "D405",
-    "D410",
-    "D411",
-    "D412",
-    "D414",
    "D415",
    "D416",
    "D417",
-    "D418",
-    "D419",
 ]
 ```

--- a/benches/source_code_locator.rs
+++ b/benches/source_code_locator.rs
@@ -0,0 +1,16 @@
+use std::path::Path;
+
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+
+use ruff::fs;
+use ruff::source_code_locator::compute_offsets;
+
+fn criterion_benchmark(c: &mut Criterion) {
+    let contents = fs::read_file(Path::new("resources/test/fixtures/D.py")).unwrap();
+    c.bench_function("compute_offsets", |b| {
+        b.iter(|| compute_offsets(black_box(&contents)))
+    });
+}
+
+criterion_group!(benches, criterion_benchmark);
+criterion_main!(benches);
--- a/foo.py
+++ b/foo.py
@@ -0,0 +1,5 @@
+def function_with_nesting():
+    """Foo bar documentation."""
+    @overload
+    def nested_overloaded_func(a: int) -> str:
+        ...
--- a/resources/test/fixtures/B006_B008.py
+++ b/resources/test/fixtures/B006_B008.py
@@ -0,0 +1,187 @@
+import collections
+import datetime as dt
+import logging
+import operator
+import random
+import re
+import time
+import types
+from operator import attrgetter, itemgetter, methodcaller
+from types import MappingProxyType
+
+
+# B006
+# Allow immutable literals/calls/comprehensions
+def this_is_okay(value=(1, 2, 3)):
+    ...
+
+
+async def and_this_also(value=tuple()):
+    pass
+
+
+def frozenset_also_okay(value=frozenset()):
+    pass
+
+
+def mappingproxytype_okay(
+    value=MappingProxyType({}), value2=types.MappingProxyType({})
+):
+    pass
+
+
+def re_compile_ok(value=re.compile("foo")):
+    pass
+
+
+def operators_ok(
+    v=operator.attrgetter("foo"),
+    v2=operator.itemgetter("foo"),
+    v3=operator.methodcaller("foo"),
+):
+    pass
+
+
+def operators_ok_unqualified(
+    v=attrgetter("foo"),
+    v2=itemgetter("foo"),
+    v3=methodcaller("foo"),
+):
+    pass
+
+
+def kwonlyargs_immutable(*, value=()):
+    ...
+
+
+# Flag mutable literals/comprehensions
+
+
+def this_is_wrong(value=[1, 2, 3]):
+    ...
+
+
+def this_is_also_wrong(value={}):
+    ...
+
+
+def and_this(value=set()):
+    ...
+
+
+def this_too(value=collections.OrderedDict()):
+    ...
+
+
+async def async_this_too(value=collections.defaultdict()):
+    ...
+
+
+def dont_forget_me(value=collections.deque()):
+    ...
+
+
+# N.B. we're also flagging the function call in the comprehension
+def list_comprehension_also_not_okay(default=[i**2 for i in range(3)]):
+    pass
+
+
+def dict_comprehension_also_not_okay(default={i: i**2 for i in range(3)}):
+    pass
+
+
+def set_comprehension_also_not_okay(default={i**2 for i in range(3)}):
+    pass
+
+
+def kwonlyargs_mutable(*, value=[]):
+    ...
+
+
+# Recommended approach for mutable defaults
+def do_this_instead(value=None):
+    if value is None:
+        value = set()
+
+
+# B008
+# Flag function calls as default args (including if they are part of a sub-expression)
+def in_fact_all_calls_are_wrong(value=time.time()):
+    ...
+
+
+def f(when=dt.datetime.now() + dt.timedelta(days=7)):
+    pass
+
+
+def can_even_catch_lambdas(a=(lambda x: x)()):
+    ...
+
+
+# Recommended approach for function calls as default args
+LOGGER = logging.getLogger(__name__)
+
+
+def do_this_instead_of_calls_in_defaults(logger=LOGGER):
+    # That makes it more obvious that this one value is reused.
+    ...
+
+
+# Handle inf/infinity/nan special case
+def float_inf_okay(value=float("inf")):
+    pass
+
+
+def float_infinity_okay(value=float("infinity")):
+    pass
+
+
+def float_plus_infinity_okay(value=float("+infinity")):
+    pass
+
+
+def float_minus_inf_okay(value=float("-inf")):
+    pass
+
+
+def float_nan_okay(value=float("nan")):
+    pass
+
+
+def float_minus_NaN_okay(value=float("-NaN")):
+    pass
+
+
+def float_infinity_literal(value=float("1e999")):
+    pass
+
+
+# But don't allow standard floats
+def float_int_is_wrong(value=float(3)):
+    pass
+
+
+def float_str_not_inf_or_nan_is_wrong(value=float("3.14")):
+    pass
+
+
+# B006 and B008
+# We should handle arbitrary nesting of these B008.
+def nested_combo(a=[float(3), dt.datetime.now()]):
+    pass
+
+
+# Don't flag nested B006 since we can't guarantee that
+# it isn't made mutable by the outer operation.
+def no_nested_b006(a=map(lambda s: s.upper(), ["a", "b", "c"])):
+    pass
+
+
+# B008-ception.
+def nested_b008(a=random.randint(0, dt.datetime.now().year)):
+    pass
+
+
+# Ignore lambda contents since they are evaluated at call time.
+def foo(f=lambda x: print(x)):
+    f(1)
--- a/resources/test/fixtures/B013.py
+++ b/resources/test/fixtures/B013.py
@@ -0,0 +1,8 @@
+try:
+    pass
+except (ValueError,):
+    pass
+except AttributeError:
+    pass
+except (ImportError, TypeError):
+    pass
--- a/resources/test/fixtures/C402.py
+++ b/resources/test/fixtures/C402.py
@@ -1 +1,2 @@
-d = dict((x, x) for x in range(3))
+dict((x, x) for x in range(3))
+dict(((x, x) for x in range(3)), z=3)
--- a/resources/test/fixtures/C404.py
+++ b/resources/test/fixtures/C404.py
@@ -1 +1,2 @@
-d = dict([(i, i) for i in range(3)])
+dict([(i, i) for i in range(3)])
+dict([(i, i) for i in range(3)], z=4)
--- a/resources/test/fixtures/N802.py
+++ b/resources/test/fixtures/N802.py
@@ -1,3 +1,6 @@
+import unittest
+
+
 def Bad():
    pass

@@ -24,3 +27,15 @@ def _good():

 def good_func():
    pass
+
+
+def tearDownModule():
+    pass
+
+
+class Test(unittest.TestCase):
+    def tearDown(self):
+        return super().tearDown()
+
+    def testTest(self):
+        assert True
--- a/resources/test/fixtures/N806.py
+++ b/resources/test/fixtures/N806.py
@@ -0,0 +1,4 @@
+def f():
+    lower = 0
+    Camel = 0
+    CONSTANT = 0
--- a/resources/test/fixtures/N815.py
+++ b/resources/test/fixtures/N815.py
@@ -0,0 +1,6 @@
+class C:
+    lower = 0
+    CONSTANT = 0
+    mixedCase = 0
+    _mixedCase = 0
+    mixed_Case = 0
--- a/resources/test/fixtures/N816.py
+++ b/resources/test/fixtures/N816.py
@@ -0,0 +1,5 @@
+lower = 0
+CONSTANT = 0
+mixedCase = 0
+_mixedCase = 0
+mixed_Case = 0
--- a/resources/test/fixtures/N818.py
+++ b/resources/test/fixtures/N818.py
@@ -0,0 +1,10 @@
+class Error(Exception):
+    pass
+
+
+class AnotherError(Exception):
+    pass
+
+
+class C(Exception):
+    pass
--- a/resources/test/fixtures/pyproject.toml
+++ b/resources/test/fixtures/pyproject.toml
@@ -14,3 +14,25 @@ inline-quotes = "single"
 multiline-quotes = "double"
 docstring-quotes = "double"
 avoid-escape = true
+
+[tool.ruff.pep8-naming]
+ignore-names = [
+    "setUp",
+    "tearDown",
+    "setUpClass",
+    "tearDownClass",
+    "setUpModule",
+    "tearDownModule",
+    "asyncSetUp",
+    "asyncTearDown",
+    "setUpTestData",
+    "failureException",
+    "longMessage",
+    "maxDiff",
+]
+classmethod-decorators = [
+    "classmethod",
+]
+staticmethod-decorators = [
+    "staticmethod",
+]
--- a/src/ast/helpers.rs
+++ b/src/ast/helpers.rs
@@ -137,7 +137,7 @@ pub fn to_absolute(relative: &Location, base: &Location) -> Location {
    if relative.row() == 1 {
        Location::new(
            relative.row() + base.row() - 1,
-            relative.column() + base.column() - 1,
+            relative.column() + base.column(),
        )
    } else {
        Location::new(relative.row() + base.row() - 1, relative.column())
--- a/src/ast/operations.rs
+++ b/src/ast/operations.rs
@@ -1,6 +1,6 @@
-use rustpython_parser::ast::{Constant, Expr, ExprKind, Location, Stmt, StmtKind};
+use rustpython_parser::ast::{Constant, Expr, ExprKind, Stmt, StmtKind};

-use crate::ast::types::{BindingKind, Range, Scope};
+use crate::ast::types::{BindingKind, Scope};

 /// Extract the names bound to a given __all__ assignment.
 pub fn extract_all_names(stmt: &Stmt, scope: &Scope) -> Vec<String> {
@@ -117,82 +117,3 @@ pub fn is_unpacking_assignment(stmt: &Stmt) -> bool {
    }
    false
 }
-
-/// Struct used to efficiently slice source code at (row, column) Locations.
-pub struct SourceCodeLocator<'a> {
-    content: &'a str,
-    offsets: Vec<Vec<usize>>,
-}
-
-impl<'a> SourceCodeLocator<'a> {
-    pub fn new(content: &'a str) -> Self {
-        SourceCodeLocator {
-            content,
-            offsets: Self::compute_offsets(content),
-        }
-    }
-
-    fn compute_offsets(content: &str) -> Vec<Vec<usize>> {
-        let mut offsets = vec![];
-        let mut offset = 0;
-        for line in content.lines() {
-            let mut newline = 0;
-            let mut line_offsets: Vec<usize> = vec![];
-            for (i, char) in line.char_indices() {
-                line_offsets.push(offset + i);
-                newline = i + char.len_utf8();
-            }
-            line_offsets.push(offset + newline);
-            offsets.push(line_offsets);
-            offset += newline + 1;
-        }
-        offsets.push(vec![offset]);
-        offsets
-    }
-
-    pub fn slice_source_code_at(&self, location: &Location) -> &'a str {
-        let offset = self.offsets[location.row() - 1][location.column() - 1];
-        &self.content[offset..]
-    }
-
-    pub fn slice_source_code_range(&self, range: &Range) -> &'a str {
-        let start = self.offsets[range.location.row() - 1][range.location.column() - 1];
-        let end = self.offsets[range.end_location.row() - 1][range.end_location.column() - 1];
-        &self.content[start..end]
-    }
-
-    pub fn partition_source_code_at(
-        &self,
-        outer: &Range,
-        inner: &Range,
-    ) -> (&'a str, &'a str, &'a str) {
-        let outer_start = self.offsets[outer.location.row() - 1][outer.location.column() - 1];
-        let outer_end = self.offsets[outer.end_location.row() - 1][outer.end_location.column() - 1];
-        let inner_start = self.offsets[inner.location.row() - 1][inner.location.column() - 1];
-        let inner_end = self.offsets[inner.end_location.row() - 1][inner.end_location.column() - 1];
-        (
-            &self.content[outer_start..inner_start],
-            &self.content[inner_start..inner_end],
-            &self.content[inner_end..outer_end],
-        )
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::SourceCodeLocator;
-
-    #[test]
-    fn source_code_locator_init() {
-        let content = "# \u{4e9c}\nclass Foo:\n    \"\"\".\"\"\"";
-        let locator = SourceCodeLocator::new(content);
-        assert_eq!(locator.offsets.len(), 4);
-        assert_eq!(locator.offsets[0], [0, 1, 2, 5]);
-        assert_eq!(locator.offsets[1], [6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]);
-        assert_eq!(
-            locator.offsets[2],
-            [17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28]
-        );
-        assert_eq!(locator.offsets[3], [29]);
-    }
-}
--- a/src/autofix/fixer.rs
+++ b/src/autofix/fixer.rs
@@ -69,19 +69,18 @@ fn apply_fixes<'a>(fixes: impl Iterator<Item = &'a mut Fix>, contents: &str) ->

        if fix.patch.location.row() > last_pos.row() {
            if last_pos.row() > 0 || last_pos.column() > 0 {
-                output.push_str(&lines[last_pos.row() - 1][last_pos.column() - 1..]);
+                output.push_str(&lines[last_pos.row() - 1][last_pos.column()..]);
                output.push('\n');
            }
            for line in &lines[last_pos.row()..fix.patch.location.row() - 1] {
                output.push_str(line);
                output.push('\n');
            }
-            output
-                .push_str(&lines[fix.patch.location.row() - 1][..fix.patch.location.column() - 1]);
+            output.push_str(&lines[fix.patch.location.row() - 1][..fix.patch.location.column()]);
            output.push_str(&fix.patch.content);
        } else {
            output.push_str(
-                &lines[last_pos.row() - 1][last_pos.column() - 1..fix.patch.location.column() - 1],
+                &lines[last_pos.row() - 1][last_pos.column()..fix.patch.location.column()],
            );
            output.push_str(&fix.patch.content);
        }
@@ -95,7 +94,7 @@ fn apply_fixes<'a>(fixes: impl Iterator<Item = &'a mut Fix>, contents: &str) ->
        && (last_pos.row() - 1) < lines.len()
        && (last_pos.row() > 0 || last_pos.column() > 0)
    {
-        output.push_str(&lines[last_pos.row() - 1][last_pos.column() - 1..]);
+        output.push_str(&lines[last_pos.row() - 1][last_pos.column()..]);
        output.push('\n');
    }
    if last_pos.row() < lines.len() {
@@ -133,8 +132,8 @@ mod tests {
        let mut fixes = vec![Fix {
            patch: Patch {
                content: "Bar".to_string(),
-                location: Location::new(1, 9),
-                end_location: Location::new(1, 15),
+                location: Location::new(1, 8),
+                end_location: Location::new(1, 14),
            },
            applied: false,
        }];
@@ -159,8 +158,8 @@ mod tests {
        let mut fixes = vec![Fix {
            patch: Patch {
                content: "".to_string(),
-                location: Location::new(1, 8),
-                end_location: Location::new(1, 16),
+                location: Location::new(1, 7),
+                end_location: Location::new(1, 15),
            },
            applied: false,
        }];
@@ -186,16 +185,16 @@ mod tests {
            Fix {
                patch: Patch {
                    content: "".to_string(),
-                    location: Location::new(1, 8),
-                    end_location: Location::new(1, 17),
+                    location: Location::new(1, 7),
+                    end_location: Location::new(1, 16),
                },
                applied: false,
            },
            Fix {
                patch: Patch {
                    content: "".to_string(),
-                    location: Location::new(1, 17),
-                    end_location: Location::new(1, 24),
+                    location: Location::new(1, 16),
+                    end_location: Location::new(1, 23),
                },
                applied: false,
            },
@@ -222,16 +221,16 @@ mod tests {
            Fix {
                patch: Patch {
                    content: "".to_string(),
-                    location: Location::new(1, 8),
-                    end_location: Location::new(1, 16),
+                    location: Location::new(1, 7),
+                    end_location: Location::new(1, 15),
                },
                applied: false,
            },
            Fix {
                patch: Patch {
                    content: "ignored".to_string(),
-                    location: Location::new(1, 10),
-                    end_location: Location::new(1, 12),
+                    location: Location::new(1, 9),
+                    end_location: Location::new(1, 11),
                },
                applied: false,
            },
--- a/src/autofix/helpers.rs
+++ b/src/autofix/helpers.rs
@@ -82,8 +82,8 @@ pub fn remove_stmt(stmt: &Stmt, parent: Option<&Stmt>, deleted: &[&Stmt]) -> Res
        // Otherwise, nuke the entire line.
        // TODO(charlie): This logic assumes that there are no multi-statement physical lines.
        Ok(Fix::deletion(
-            Location::new(stmt.location.row(), 1),
-            Location::new(stmt.end_location.unwrap().row() + 1, 1),
+            Location::new(stmt.location.row(), 0),
+            Location::new(stmt.end_location.unwrap().row() + 1, 0),
        ))
    }
 }
--- a/src/check_ast.rs
+++ b/src/check_ast.rs
@@ -5,7 +5,6 @@ use std::ops::Deref;
 use std::path::Path;

 use log::error;
-use once_cell::unsync::OnceCell;
 use rustpython_parser::ast::{
    Arg, Arguments, Constant, Excepthandler, ExcepthandlerKind, Expr, ExprContext, ExprKind,
    KeywordData, Operator, Stmt, StmtKind, Suite,
@@ -13,7 +12,7 @@ use rustpython_parser::ast::{
 use rustpython_parser::parser;

 use crate::ast::helpers::{extract_handler_names, match_name_or_attr, SubscriptKind};
-use crate::ast::operations::{extract_all_names, SourceCodeLocator};
+use crate::ast::operations::extract_all_names;
 use crate::ast::relocate::relocate_expr;
 use crate::ast::types::{
    Binding, BindingContext, BindingKind, CheckLocator, FunctionScope, ImportKind, Range, Scope,
@@ -28,6 +27,7 @@ use crate::python::builtins::{BUILTINS, MAGIC_GLOBALS};
 use crate::python::future::ALL_FEATURE_NAMES;
 use crate::settings::types::PythonVersion;
 use crate::settings::Settings;
+use crate::source_code_locator::SourceCodeLocator;
 use crate::visibility::{module_visibility, transition_scope, Modifier, Visibility, VisibleScope};
 use crate::{
    docstrings, flake8_bugbear, flake8_builtins, flake8_comprehensions, flake8_print, pep8_naming,
@@ -39,13 +39,11 @@ pub const GLOBAL_SCOPE_INDEX: usize = 0;
 pub struct Checker<'a> {
    // Input data.
    path: &'a Path,
-    content: &'a str,
    autofix: &'a fixer::Mode,
    pub(crate) settings: &'a Settings,
+    pub(crate) locator: &'a SourceCodeLocator<'a>,
    // Computed checks.
    checks: Vec<Check>,
-    // Efficient source-code slicing.
-    locator: OnceCell<SourceCodeLocator<'a>>,
    // Docstring tracking.
    docstrings: Vec<(Definition<'a>, Visibility)>,
    // Edit tracking.
@@ -79,14 +77,13 @@ impl<'a> Checker<'a> {
        settings: &'a Settings,
        autofix: &'a fixer::Mode,
        path: &'a Path,
-        content: &'a str,
+        locator: &'a SourceCodeLocator,
    ) -> Checker<'a> {
        Checker {
            settings,
            autofix,
            path,
-            content,
-            locator: OnceCell::new(),
+            locator,
            checks: Default::default(),
            docstrings: Default::default(),
            deletions: Default::default(),
@@ -114,12 +111,6 @@ impl<'a> Checker<'a> {
        }
    }

-    /// Get access to a lazily-initialized `SourceCodeLocator` for the file contents.
-    pub fn get_locator(&self) -> &SourceCodeLocator {
-        self.locator
-            .get_or_init(|| SourceCodeLocator::new(self.content))
-    }
-
    /// Return `true` if a patch should be generated under the given autofix `Mode`.
    pub fn patch(&self) -> bool {
        self.autofix.patch()
@@ -236,7 +227,11 @@ where
                }

                if self.settings.enabled.contains(&CheckCode::N802) {
-                    if let Some(check) = pep8_naming::checks::invalid_function_name(stmt, name) {
+                    if let Some(check) = pep8_naming::checks::invalid_function_name(
+                        stmt,
+                        name,
+                        &self.settings.pep8_naming,
+                    ) {
                        self.checks.push(check);
                    }
                }
@@ -247,6 +242,7 @@ where
                            self.current_scope(),
                            decorator_list,
                            args,
+                            &self.settings.pep8_naming,
                        )
                    {
                        self.checks.push(check);
@@ -258,6 +254,7 @@ where
                        self.current_scope(),
                        decorator_list,
                        args,
+                        &self.settings.pep8_naming,
                    ) {
                        self.checks.push(check);
                    }
@@ -363,6 +360,14 @@ where
                    }
                }

+                if self.settings.enabled.contains(&CheckCode::N818) {
+                    if let Some(check) =
+                        pep8_naming::checks::error_suffix_on_exception_name(stmt, bases, name)
+                    {
+                        self.checks.push(check);
+                    }
+                }
+
                self.check_builtin_shadowing(
                    name,
                    self.locate_check(Range::from_located(stmt)),
@@ -382,7 +387,7 @@ where
            }
            StmtKind::Import { names } => {
                if self.settings.enabled.contains(&CheckCode::E402) {
-                    if self.seen_import_boundary && stmt.location.column() == 1 {
+                    if self.seen_import_boundary && stmt.location.column() == 0 {
                        self.checks.push(Check::new(
                            CheckKind::ModuleImportNotAtTopOfFile,
                            self.locate_check(Range::from_located(stmt)),
@@ -488,7 +493,7 @@ where
                level,
            } => {
                if self.settings.enabled.contains(&CheckCode::E402) {
-                    if self.seen_import_boundary && stmt.location.column() == 1 {
+                    if self.seen_import_boundary && stmt.location.column() == 0 {
                        self.checks.push(Check::new(
                            CheckKind::ModuleImportNotAtTopOfFile,
                            self.locate_check(Range::from_located(stmt)),
@@ -706,6 +711,9 @@ where
                {
                    flake8_bugbear::plugins::duplicate_exceptions(self, stmt, handlers);
                }
+                if self.settings.enabled.contains(&CheckCode::B013) {
+                    flake8_bugbear::plugins::redundant_tuple_in_exception_handler(self, handlers);
+                }
            }
            StmtKind::Assign { targets, value, .. } => {
                if self.settings.enabled.contains(&CheckCode::E731) {
@@ -916,7 +924,6 @@ where
                func,
                args,
                keywords,
-                ..
            } => {
                if self.settings.enabled.contains(&CheckCode::U005) {
                    pyupgrade::plugins::deprecated_unittest_alias(self, func);
@@ -936,25 +943,25 @@ where

                // flake8-comprehensions
                if self.settings.enabled.contains(&CheckCode::C400) {
-                    if let Some(check) =
-                        flake8_comprehensions::checks::unnecessary_generator_list(expr, func, args)
-                    {
+                    if let Some(check) = flake8_comprehensions::checks::unnecessary_generator_list(
+                        expr, func, args, keywords,
+                    ) {
                        self.checks.push(check);
                    };
                }

                if self.settings.enabled.contains(&CheckCode::C401) {
-                    if let Some(check) =
-                        flake8_comprehensions::checks::unnecessary_generator_set(expr, func, args)
-                    {
+                    if let Some(check) = flake8_comprehensions::checks::unnecessary_generator_set(
+                        expr, func, args, keywords,
+                    ) {
                        self.checks.push(check);
                    };
                }

                if self.settings.enabled.contains(&CheckCode::C402) {
-                    if let Some(check) =
-                        flake8_comprehensions::checks::unnecessary_generator_dict(expr, func, args)
-                    {
+                    if let Some(check) = flake8_comprehensions::checks::unnecessary_generator_dict(
+                        expr, func, args, keywords,
+                    ) {
                        self.checks.push(check);
                    };
                }
@@ -962,7 +969,7 @@ where
                if self.settings.enabled.contains(&CheckCode::C403) {
                    if let Some(check) =
                        flake8_comprehensions::checks::unnecessary_list_comprehension_set(
-                            expr, func, args,
+                            expr, func, args, keywords,
                        )
                    {
                        self.checks.push(check);
@@ -972,7 +979,7 @@ where
                if self.settings.enabled.contains(&CheckCode::C404) {
                    if let Some(check) =
                        flake8_comprehensions::checks::unnecessary_list_comprehension_dict(
-                            expr, func, args,
+                            expr, func, args, keywords,
                        )
                    {
                        self.checks.push(check);
@@ -980,17 +987,17 @@ where
                }

                if self.settings.enabled.contains(&CheckCode::C405) {
-                    if let Some(check) =
-                        flake8_comprehensions::checks::unnecessary_literal_set(expr, func, args)
-                    {
+                    if let Some(check) = flake8_comprehensions::checks::unnecessary_literal_set(
+                        expr, func, args, keywords,
+                    ) {
                        self.checks.push(check);
                    };
                }

                if self.settings.enabled.contains(&CheckCode::C406) {
-                    if let Some(check) =
-                        flake8_comprehensions::checks::unnecessary_literal_dict(expr, func, args)
-                    {
+                    if let Some(check) = flake8_comprehensions::checks::unnecessary_literal_dict(
+                        expr, func, args, keywords,
+                    ) {
                        self.checks.push(check);
                    };
                }
@@ -1496,6 +1503,9 @@ where
            self.checks
                .extend(pyflakes::checks::duplicate_arguments(arguments));
        }
+        if self.settings.enabled.contains(&CheckCode::B006) {
+            flake8_bugbear::plugins::mutable_argument_default(self, arguments)
+        }

        // Bind, but intentionally avoid walking default expressions, as we handle them upstream.
        for arg in &arguments.posonlyargs {
@@ -1799,6 +1809,30 @@ impl<'a> Checker<'a> {
                }
            }

+            if self.settings.enabled.contains(&CheckCode::N806) {
+                if let Some(check) =
+                    pep8_naming::checks::non_lowercase_variable_in_function(current, expr, id)
+                {
+                    self.checks.push(check);
+                }
+            }
+
+            if self.settings.enabled.contains(&CheckCode::N815) {
+                if let Some(check) =
+                    pep8_naming::checks::mixed_case_variable_in_class_scope(current, expr, id)
+                {
+                    self.checks.push(check);
+                }
+            }
+
+            if self.settings.enabled.contains(&CheckCode::N816) {
+                if let Some(check) =
+                    pep8_naming::checks::mixed_case_variable_in_global_scope(current, expr, id)
+                {
+                    self.checks.push(check);
+                }
+            }
+
            if matches!(parent.node, StmtKind::AnnAssign { value: None, .. }) {
                self.add_binding(
                    id.to_string(),
@@ -2105,7 +2139,7 @@ impl<'a> Checker<'a> {
                            ImportKind::ImportFrom => pyflakes::fixes::remove_unused_import_froms,
                        };

-                        match removal_fn(self.get_locator(), &full_names, child, parent, &deleted) {
+                        match removal_fn(self.locator, &full_names, child, parent, &deleted) {
                            Ok(fix) => Some(fix),
                            Err(e) => {
                                error!("Failed to fix unused imports: {}", e);
@@ -2265,12 +2299,12 @@ impl<'a> Checker<'a> {

 pub fn check_ast(
    python_ast: &Suite,
-    contents: &str,
+    locator: &SourceCodeLocator,
    settings: &Settings,
    autofix: &fixer::Mode,
    path: &Path,
 ) -> Vec<Check> {
-    let mut checker = Checker::new(settings, autofix, path, contents);
+    let mut checker = Checker::new(settings, autofix, path, locator);
    checker.push_scope(Scope::new(ScopeKind::Module));
    checker.bind_builtins();

--- a/src/check_lines.rs
+++ b/src/check_lines.rs
@@ -94,8 +94,8 @@ pub fn check_lines(
                let check = Check::new(
                    CheckKind::LineTooLong(line_length, settings.line_length),
                    Range {
-                        location: Location::new(lineno + 1, 1),
-                        end_location: Location::new(lineno + 1, line_length + 1),
+                        location: Location::new(lineno + 1, 0),
+                        end_location: Location::new(lineno + 1, line_length),
                    },
                );

@@ -164,14 +164,14 @@ pub fn check_lines(
                        let mut check = Check::new(
                            CheckKind::UnusedNOQA(None),
                            Range {
-                                location: Location::new(row + 1, start + 1),
-                                end_location: Location::new(row + 1, end + 1),
+                                location: Location::new(row + 1, start),
+                                end_location: Location::new(row + 1, end),
                            },
                        );
                        if autofix.patch() {
                            check.amend(Fix::deletion(
-                                Location::new(row + 1, start + 1),
-                                Location::new(row + 1, lines[row].chars().count() + 1),
+                                Location::new(row + 1, start),
+                                Location::new(row + 1, lines[row].chars().count()),
                            ));
                        }
                        line_checks.push(check);
@@ -192,21 +192,21 @@ pub fn check_lines(
                        let mut check = Check::new(
                            CheckKind::UnusedNOQA(Some(invalid_codes)),
                            Range {
-                                location: Location::new(row + 1, start + 1),
-                                end_location: Location::new(row + 1, end + 1),
+                                location: Location::new(row + 1, start),
+                                end_location: Location::new(row + 1, end),
                            },
                        );
                        if autofix.patch() {
                            if valid_codes.is_empty() {
                                check.amend(Fix::deletion(
-                                    Location::new(row + 1, start + 1),
-                                    Location::new(row + 1, lines[row].chars().count() + 1),
+                                    Location::new(row + 1, start),
+                                    Location::new(row + 1, lines[row].chars().count()),
                                ));
                            } else {
                                check.amend(Fix::replacement(
                                    format!("  # noqa: {}", valid_codes.join(", ")),
-                                    Location::new(row + 1, start + 1),
-                                    Location::new(row + 1, lines[row].chars().count() + 1),
+                                    Location::new(row + 1, start),
+                                    Location::new(row + 1, lines[row].chars().count()),
                                ));
                            }
                        }
--- a/src/check_tokens.rs
+++ b/src/check_tokens.rs
@@ -2,14 +2,14 @@

 use rustpython_parser::lexer::{LexResult, Tok};

-use crate::ast::operations::SourceCodeLocator;
 use crate::checks::{Check, CheckCode};
 use crate::flake8_quotes::docstring_detection::StateMachine;
+use crate::source_code_locator::SourceCodeLocator;
 use crate::{flake8_quotes, pycodestyle, Settings};

 pub fn check_tokens(
    checks: &mut Vec<Check>,
-    contents: &str,
+    locator: &SourceCodeLocator,
    tokens: &[LexResult],
    settings: &Settings,
 ) {
@@ -19,16 +19,13 @@ pub fn check_tokens(
        | settings.enabled.contains(&CheckCode::Q002)
        | settings.enabled.contains(&CheckCode::Q003);

-    // TODO(charlie): Use a shared SourceCodeLocator between this site and the AST traversal.
-    let locator = SourceCodeLocator::new(contents);
-
    let mut state_machine = StateMachine::new();
    for (start, tok, end) in tokens.iter().flatten() {
        // W605
        if enforce_invalid_escape_sequence {
            if matches!(tok, Tok::String { .. }) {
                checks.extend(pycodestyle::checks::invalid_escape_sequence(
-                    &locator, start, end,
+                    locator, start, end,
                ));
            }
        }
@@ -38,7 +35,7 @@ pub fn check_tokens(
            let is_docstring = state_machine.consume(tok);
            if matches!(tok, Tok::String { .. }) {
                if let Some(check) = flake8_quotes::checks::quotes(
-                    &locator,
+                    locator,
                    start,
                    end,
                    is_docstring,
--- a/src/checks.rs
+++ b/src/checks.rs
@@ -78,8 +78,10 @@ pub enum CheckCode {
    A003,
    // flake8-bugbear
    B002,
+    B006,
    B007,
    B011,
+    B013,
    B014,
    B017,
    B025,
@@ -168,12 +170,16 @@ pub enum CheckCode {
    N803,
    N804,
    N805,
+    N806,
    N807,
    N811,
    N812,
    N813,
    N814,
+    N815,
+    N816,
    N817,
+    N818,
    // Meta
    M001,
 }
@@ -282,8 +288,10 @@ pub enum CheckKind {
    BuiltinAttributeShadowing(String),
    // flake8-bugbear
    UnaryPrefixIncrement,
+    MutableArgumentDefault,
    UnusedLoopControlVariable(String),
    DoNotAssertFalse,
+    RedundantTupleInExceptionHandler(String),
    DuplicateHandlerException(Vec<String>),
    NoAssertRaisesException,
    DuplicateTryBlockException(String),
@@ -372,12 +380,16 @@ pub enum CheckKind {
    InvalidArgumentName(String),
    InvalidFirstArgumentNameForClassMethod,
    InvalidFirstArgumentNameForMethod,
+    NonLowercaseVariableInFunction(String),
    DunderFunctionName,
    ConstantImportedAsNonConstant(String, String),
    LowercaseImportedAsNonLowercase(String, String),
    CamelcaseImportedAsLowercase(String, String),
    CamelcaseImportedAsConstant(String, String),
+    MixedCaseVariableInClassScope(String),
+    MixedCaseVariableInGlobalScope(String),
    CamelcaseImportedAsAcronym(String, String),
+    ErrorSuffixOnExceptionName(String),
    // Meta
    UnusedNOQA(Option<Vec<String>>),
 }
@@ -455,8 +467,12 @@ impl CheckCode {
            CheckCode::A003 => CheckKind::BuiltinAttributeShadowing("...".to_string()),
            // flake8-bugbear
            CheckCode::B002 => CheckKind::UnaryPrefixIncrement,
+            CheckCode::B006 => CheckKind::MutableArgumentDefault,
            CheckCode::B007 => CheckKind::UnusedLoopControlVariable("i".to_string()),
            CheckCode::B011 => CheckKind::DoNotAssertFalse,
+            CheckCode::B013 => {
+                CheckKind::RedundantTupleInExceptionHandler("ValueError".to_string())
+            }
            CheckCode::B014 => CheckKind::DuplicateHandlerException(vec!["ValueError".to_string()]),
            CheckCode::B017 => CheckKind::NoAssertRaisesException,
            CheckCode::B025 => CheckKind::DuplicateTryBlockException("Exception".to_string()),
@@ -567,6 +583,7 @@ impl CheckCode {
            CheckCode::N803 => CheckKind::InvalidArgumentName("...".to_string()),
            CheckCode::N804 => CheckKind::InvalidFirstArgumentNameForClassMethod,
            CheckCode::N805 => CheckKind::InvalidFirstArgumentNameForMethod,
+            CheckCode::N806 => CheckKind::NonLowercaseVariableInFunction("...".to_string()),
            CheckCode::N807 => CheckKind::DunderFunctionName,
            CheckCode::N811 => {
                CheckKind::ConstantImportedAsNonConstant("...".to_string(), "...".to_string())
@@ -580,9 +597,12 @@ impl CheckCode {
            CheckCode::N814 => {
                CheckKind::CamelcaseImportedAsConstant("...".to_string(), "...".to_string())
            }
+            CheckCode::N815 => CheckKind::MixedCaseVariableInClassScope("mixedCase".to_string()),
+            CheckCode::N816 => CheckKind::MixedCaseVariableInGlobalScope("mixedCase".to_string()),
            CheckCode::N817 => {
                CheckKind::CamelcaseImportedAsAcronym("...".to_string(), "...".to_string())
            }
+            CheckCode::N818 => CheckKind::ErrorSuffixOnExceptionName("...".to_string()),
            // Meta
            CheckCode::M001 => CheckKind::UnusedNOQA(None),
        }
@@ -638,8 +658,10 @@ impl CheckCode {
            CheckCode::A002 => CheckCategory::Flake8Builtins,
            CheckCode::A003 => CheckCategory::Flake8Builtins,
            CheckCode::B002 => CheckCategory::Flake8Bugbear,
+            CheckCode::B006 => CheckCategory::Flake8Bugbear,
            CheckCode::B007 => CheckCategory::Flake8Bugbear,
            CheckCode::B011 => CheckCategory::Flake8Bugbear,
+            CheckCode::B013 => CheckCategory::Flake8Bugbear,
            CheckCode::B014 => CheckCategory::Flake8Bugbear,
            CheckCode::B017 => CheckCategory::Flake8Bugbear,
            CheckCode::B025 => CheckCategory::Flake8Bugbear,
@@ -722,12 +744,16 @@ impl CheckCode {
            CheckCode::N803 => CheckCategory::PEP8Naming,
            CheckCode::N804 => CheckCategory::PEP8Naming,
            CheckCode::N805 => CheckCategory::PEP8Naming,
+            CheckCode::N806 => CheckCategory::PEP8Naming,
            CheckCode::N807 => CheckCategory::PEP8Naming,
            CheckCode::N811 => CheckCategory::PEP8Naming,
            CheckCode::N812 => CheckCategory::PEP8Naming,
            CheckCode::N813 => CheckCategory::PEP8Naming,
            CheckCode::N814 => CheckCategory::PEP8Naming,
+            CheckCode::N815 => CheckCategory::PEP8Naming,
+            CheckCode::N816 => CheckCategory::PEP8Naming,
            CheckCode::N817 => CheckCategory::PEP8Naming,
+            CheckCode::N818 => CheckCategory::PEP8Naming,
            CheckCode::M001 => CheckCategory::Meta,
        }
    }
@@ -789,8 +815,10 @@ impl CheckKind {
            CheckKind::BuiltinAttributeShadowing(_) => &CheckCode::A003,
            // flake8-bugbear
            CheckKind::UnaryPrefixIncrement => &CheckCode::B002,
+            CheckKind::MutableArgumentDefault => &CheckCode::B006,
            CheckKind::UnusedLoopControlVariable(_) => &CheckCode::B007,
            CheckKind::DoNotAssertFalse => &CheckCode::B011,
+            CheckKind::RedundantTupleInExceptionHandler(_) => &CheckCode::B013,
            CheckKind::DuplicateHandlerException(_) => &CheckCode::B014,
            CheckKind::NoAssertRaisesException => &CheckCode::B017,
            CheckKind::DuplicateTryBlockException(_) => &CheckCode::B025,
@@ -879,12 +907,16 @@ impl CheckKind {
            CheckKind::InvalidArgumentName(_) => &CheckCode::N803,
            CheckKind::InvalidFirstArgumentNameForClassMethod => &CheckCode::N804,
            CheckKind::InvalidFirstArgumentNameForMethod => &CheckCode::N805,
+            CheckKind::NonLowercaseVariableInFunction(..) => &CheckCode::N806,
            CheckKind::DunderFunctionName => &CheckCode::N807,
            CheckKind::ConstantImportedAsNonConstant(..) => &CheckCode::N811,
            CheckKind::LowercaseImportedAsNonLowercase(..) => &CheckCode::N812,
            CheckKind::CamelcaseImportedAsLowercase(..) => &CheckCode::N813,
            CheckKind::CamelcaseImportedAsConstant(..) => &CheckCode::N814,
+            CheckKind::MixedCaseVariableInClassScope(..) => &CheckCode::N815,
+            CheckKind::MixedCaseVariableInGlobalScope(..) => &CheckCode::N816,
            CheckKind::CamelcaseImportedAsAcronym(..) => &CheckCode::N817,
+            CheckKind::ErrorSuffixOnExceptionName(..) => &CheckCode::N818,
            // Meta
            CheckKind::UnusedNOQA(_) => &CheckCode::M001,
        }
@@ -1023,7 +1055,7 @@ impl CheckKind {
                format!("Local variable `{name}` is assigned to but never used")
            }
            CheckKind::YieldOutsideFunction => {
-                "`yield` or `yield from` statement outside of a function/method".to_string()
+                "`yield` or `yield from` statement outside of a function".to_string()
            }
            // pycodestyle warnings
            CheckKind::NoNewLineAtEndOfFile => "No newline at end of file".to_string(),
@@ -1040,11 +1072,15 @@ impl CheckKind {
            }
            // flake8-bugbear
            CheckKind::UnaryPrefixIncrement => "Python does not support the unary prefix increment. Writing `++n` is equivalent to `+(+(n))`, which equals `n`. You meant `n += 1`.".to_string(),
+            CheckKind::MutableArgumentDefault => "Do not use mutable data structures for argument defaults.".to_string(),
            CheckKind::UnusedLoopControlVariable(name) => format!("Loop control variable `{name}` not used within the loop body. If this is intended, start the name with an underscore."),
            CheckKind::DoNotAssertFalse => {
                "Do not `assert False` (`python -O` removes these calls), raise `AssertionError()`"
                    .to_string()
            }
+            CheckKind::RedundantTupleInExceptionHandler(name) => {
+                format!("A length-one tuple literal is redundant. Write `except {name}:` instead of `except ({name},):`.")
+            }
            CheckKind::DuplicateHandlerException(names) => {
                if names.len() == 1 {
                    let name = &names[0];
@@ -1120,7 +1156,7 @@ impl CheckKind {
                format!("Unnecessary subscript reversal of iterable within `{func}()`")
            }
            CheckKind::UnnecessaryComprehension(obj_type) => {
-                format!(" Unnecessary `{obj_type}` comprehension (rewrite using `{obj_type}()`)")
+                format!("Unnecessary `{obj_type}` comprehension (rewrite using `{obj_type}()`)")
            }
            CheckKind::UnnecessaryMap(obj_type) => {
                if obj_type == "generator" {
@@ -1161,7 +1197,7 @@ impl CheckKind {
            }
            CheckKind::UselessMetaclassType => "`__metaclass__ = type` is implied".to_string(),
            CheckKind::DeprecatedUnittestAlias(alias, target) => {
-                format!("`{}` is deprecated, use `{}` instead", alias, target)
+                format!("`{alias}` is deprecated, use `{target}` instead")
            }
            CheckKind::UselessObjectInheritance(name) => {
                format!("Class `{name}` inherits from object")
@@ -1231,10 +1267,10 @@ impl CheckKind {
            CheckKind::PublicNestedClass => "Missing docstring in public nested class".to_string(),
            CheckKind::PublicInit => "Missing docstring in `__init__`".to_string(),
            CheckKind::NoThisPrefix => {
-                "First word of the docstring should not be `This`".to_string()
+                "First word of the docstring should not be 'This'".to_string()
            }
            CheckKind::SkipDocstring => {
-                "Function decorated with @overload shouldn't contain a docstring".to_string()
+                "Function decorated with `@overload` shouldn't contain a docstring".to_string()
            }
            CheckKind::CapitalizeSectionName(name) => {
                format!("Section name should be properly capitalized (\"{name}\")")
@@ -1305,6 +1341,9 @@ impl CheckKind {
            CheckKind::InvalidFirstArgumentNameForMethod => {
                "First argument of a method should be named `self`".to_string()
            }
+            CheckKind::NonLowercaseVariableInFunction(name) => {
+                format!("Variable `{name}` in function should be lowercase")
+            }
            CheckKind::DunderFunctionName => {
                "Function name should not start and end with `__`".to_string()
            }
@@ -1320,9 +1359,18 @@ impl CheckKind {
            CheckKind::CamelcaseImportedAsConstant(name, asname) => {
                format!("Camelcase `{name}` imported as constant `{asname}`")
            }
+            CheckKind::MixedCaseVariableInClassScope(name) => {
+                format!("Variable `{name}` in class scope should not be mixedCase")
+            }
+            CheckKind::MixedCaseVariableInGlobalScope(name) => {
+                format!("Variable `{name}` in global scope should not be mixedCase")
+            }
            CheckKind::CamelcaseImportedAsAcronym(name, asname) => {
                format!("Camelcase `{name}` imported as acronym `{asname}`")
            }
+            CheckKind::ErrorSuffixOnExceptionName(name) => {
+                format!("Exception name `{name}` should be named with an Error suffix")
+            }
            // Meta
            CheckKind::UnusedNOQA(codes) => match codes {
                None => "Unused `noqa` directive".to_string(),
--- a/src/checks_gen.rs
+++ b/src/checks_gen.rs
@@ -17,9 +17,11 @@ pub enum CheckCodePrefix {
    B0,
    B00,
    B002,
+    B006,
    B007,
    B01,
    B011,
+    B013,
    B014,
    B017,
    B02,
@@ -184,13 +186,24 @@ pub enum CheckCodePrefix {
    N803,
    N804,
    N805,
+    N806,
    N807,
    N81,
    N811,
    N812,
    N813,
    N814,
+    N815,
+    N816,
    N817,
+    N818,
+    Q,
+    Q0,
+    Q00,
+    Q000,
+    Q001,
+    Q002,
+    Q003,
    T,
    T2,
    T20,
@@ -235,25 +248,36 @@ impl CheckCodePrefix {
            CheckCodePrefix::A003 => vec![CheckCode::A003],
            CheckCodePrefix::B => vec![
                CheckCode::B002,
+                CheckCode::B006,
                CheckCode::B007,
                CheckCode::B011,
+                CheckCode::B013,
                CheckCode::B014,
                CheckCode::B017,
                CheckCode::B025,
            ],
            CheckCodePrefix::B0 => vec![
                CheckCode::B002,
+                CheckCode::B006,
                CheckCode::B007,
                CheckCode::B011,
+                CheckCode::B013,
                CheckCode::B014,
                CheckCode::B017,
                CheckCode::B025,
            ],
-            CheckCodePrefix::B00 => vec![CheckCode::B002, CheckCode::B007],
+            CheckCodePrefix::B00 => vec![CheckCode::B002, CheckCode::B006, CheckCode::B007],
            CheckCodePrefix::B002 => vec![CheckCode::B002],
+            CheckCodePrefix::B006 => vec![CheckCode::B006],
            CheckCodePrefix::B007 => vec![CheckCode::B007],
-            CheckCodePrefix::B01 => vec![CheckCode::B011, CheckCode::B014, CheckCode::B017],
+            CheckCodePrefix::B01 => vec![
+                CheckCode::B011,
+                CheckCode::B013,
+                CheckCode::B014,
+                CheckCode::B017,
+            ],
            CheckCodePrefix::B011 => vec![CheckCode::B011],
+            CheckCodePrefix::B013 => vec![CheckCode::B013],
            CheckCodePrefix::B014 => vec![CheckCode::B014],
            CheckCodePrefix::B017 => vec![CheckCode::B017],
            CheckCodePrefix::B02 => vec![CheckCode::B025],
@@ -716,12 +740,16 @@ impl CheckCodePrefix {
                CheckCode::N803,
                CheckCode::N804,
                CheckCode::N805,
+                CheckCode::N806,
                CheckCode::N807,
                CheckCode::N811,
                CheckCode::N812,
                CheckCode::N813,
                CheckCode::N814,
+                CheckCode::N815,
+                CheckCode::N816,
                CheckCode::N817,
+                CheckCode::N818,
            ],
            CheckCodePrefix::N8 => vec![
                CheckCode::N801,
@@ -729,12 +757,16 @@ impl CheckCodePrefix {
                CheckCode::N803,
                CheckCode::N804,
                CheckCode::N805,
+                CheckCode::N806,
                CheckCode::N807,
                CheckCode::N811,
                CheckCode::N812,
                CheckCode::N813,
                CheckCode::N814,
+                CheckCode::N815,
+                CheckCode::N816,
                CheckCode::N817,
+                CheckCode::N818,
            ],
            CheckCodePrefix::N80 => vec![
                CheckCode::N801,
@@ -742,6 +774,7 @@ impl CheckCodePrefix {
                CheckCode::N803,
                CheckCode::N804,
                CheckCode::N805,
+                CheckCode::N806,
                CheckCode::N807,
            ],
            CheckCodePrefix::N801 => vec![CheckCode::N801],
@@ -749,19 +782,48 @@ impl CheckCodePrefix {
            CheckCodePrefix::N803 => vec![CheckCode::N803],
            CheckCodePrefix::N804 => vec![CheckCode::N804],
            CheckCodePrefix::N805 => vec![CheckCode::N805],
+            CheckCodePrefix::N806 => vec![CheckCode::N806],
            CheckCodePrefix::N807 => vec![CheckCode::N807],
            CheckCodePrefix::N81 => vec![
                CheckCode::N811,
                CheckCode::N812,
                CheckCode::N813,
                CheckCode::N814,
+                CheckCode::N815,
+                CheckCode::N816,
                CheckCode::N817,
+                CheckCode::N818,
            ],
            CheckCodePrefix::N811 => vec![CheckCode::N811],
            CheckCodePrefix::N812 => vec![CheckCode::N812],
            CheckCodePrefix::N813 => vec![CheckCode::N813],
            CheckCodePrefix::N814 => vec![CheckCode::N814],
+            CheckCodePrefix::N815 => vec![CheckCode::N815],
+            CheckCodePrefix::N816 => vec![CheckCode::N816],
            CheckCodePrefix::N817 => vec![CheckCode::N817],
+            CheckCodePrefix::N818 => vec![CheckCode::N818],
+            CheckCodePrefix::Q => vec![
+                CheckCode::Q000,
+                CheckCode::Q001,
+                CheckCode::Q002,
+                CheckCode::Q003,
+            ],
+            CheckCodePrefix::Q0 => vec![
+                CheckCode::Q000,
+                CheckCode::Q001,
+                CheckCode::Q002,
+                CheckCode::Q003,
+            ],
+            CheckCodePrefix::Q00 => vec![
+                CheckCode::Q000,
+                CheckCode::Q001,
+                CheckCode::Q002,
+                CheckCode::Q003,
+            ],
+            CheckCodePrefix::Q000 => vec![CheckCode::Q000],
+            CheckCodePrefix::Q001 => vec![CheckCode::Q001],
+            CheckCodePrefix::Q002 => vec![CheckCode::Q002],
+            CheckCodePrefix::Q003 => vec![CheckCode::Q003],
            CheckCodePrefix::T => vec![CheckCode::T201, CheckCode::T203],
            CheckCodePrefix::T2 => vec![CheckCode::T201, CheckCode::T203],
            CheckCodePrefix::T20 => vec![CheckCode::T201, CheckCode::T203],
@@ -829,9 +891,11 @@ impl CheckCodePrefix {
            CheckCodePrefix::B0 => PrefixSpecificity::Hundreds,
            CheckCodePrefix::B00 => PrefixSpecificity::Tens,
            CheckCodePrefix::B002 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::B006 => PrefixSpecificity::Explicit,
            CheckCodePrefix::B007 => PrefixSpecificity::Explicit,
            CheckCodePrefix::B01 => PrefixSpecificity::Tens,
            CheckCodePrefix::B011 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::B013 => PrefixSpecificity::Explicit,
            CheckCodePrefix::B014 => PrefixSpecificity::Explicit,
            CheckCodePrefix::B017 => PrefixSpecificity::Explicit,
            CheckCodePrefix::B02 => PrefixSpecificity::Tens,
@@ -996,13 +1060,24 @@ impl CheckCodePrefix {
            CheckCodePrefix::N803 => PrefixSpecificity::Explicit,
            CheckCodePrefix::N804 => PrefixSpecificity::Explicit,
            CheckCodePrefix::N805 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::N806 => PrefixSpecificity::Explicit,
            CheckCodePrefix::N807 => PrefixSpecificity::Explicit,
            CheckCodePrefix::N81 => PrefixSpecificity::Tens,
            CheckCodePrefix::N811 => PrefixSpecificity::Explicit,
            CheckCodePrefix::N812 => PrefixSpecificity::Explicit,
            CheckCodePrefix::N813 => PrefixSpecificity::Explicit,
            CheckCodePrefix::N814 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::N815 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::N816 => PrefixSpecificity::Explicit,
            CheckCodePrefix::N817 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::N818 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::Q => PrefixSpecificity::Category,
+            CheckCodePrefix::Q0 => PrefixSpecificity::Hundreds,
+            CheckCodePrefix::Q00 => PrefixSpecificity::Tens,
+            CheckCodePrefix::Q000 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::Q001 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::Q002 => PrefixSpecificity::Explicit,
+            CheckCodePrefix::Q003 => PrefixSpecificity::Explicit,
            CheckCodePrefix::T => PrefixSpecificity::Category,
            CheckCodePrefix::T2 => PrefixSpecificity::Hundreds,
            CheckCodePrefix::T20 => PrefixSpecificity::Tens,
--- a/src/docstrings/helpers.rs
+++ b/src/docstrings/helpers.rs
@@ -27,8 +27,8 @@ pub fn leading_space(line: &str) -> String {
 /// Extract the leading indentation from a docstring.
 pub fn indentation<'a>(checker: &'a Checker, docstring: &Expr) -> &'a str {
    let range = Range::from_located(docstring);
-    checker.get_locator().slice_source_code_range(&Range {
-        location: Location::new(range.location.row(), 1),
+    checker.locator.slice_source_code_range(&Range {
+        location: Location::new(range.location.row(), 0),
        end_location: Location::new(range.location.row(), range.location.column()),
    })
 }
--- a/src/flake8_bugbear/plugins/mod.rs
+++ b/src/flake8_bugbear/plugins/mod.rs
@@ -2,11 +2,15 @@ pub use assert_false::assert_false;
 pub use assert_raises_exception::assert_raises_exception;
 pub use duplicate_exceptions::duplicate_exceptions;
 pub use duplicate_exceptions::duplicate_handler_exceptions;
+pub use mutable_argument_default::mutable_argument_default;
+pub use redundant_tuple_in_exception_handler::redundant_tuple_in_exception_handler;
 pub use unary_prefix_increment::unary_prefix_increment;
 pub use unused_loop_control_variable::unused_loop_control_variable;

 mod assert_false;
 mod assert_raises_exception;
 mod duplicate_exceptions;
+mod mutable_argument_default;
+mod redundant_tuple_in_exception_handler;
 mod unary_prefix_increment;
 mod unused_loop_control_variable;
--- a/src/flake8_bugbear/plugins/mutable_argument_default.rs
+++ b/src/flake8_bugbear/plugins/mutable_argument_default.rs
@@ -0,0 +1,62 @@
+use rustpython_ast::{Arguments, ExprKind};
+
+use crate::ast::types::{CheckLocator, Range};
+use crate::check_ast::Checker;
+use crate::checks::{Check, CheckKind};
+
+/// B006
+pub fn mutable_argument_default(checker: &mut Checker, arguments: &Arguments) {
+    for expr in arguments
+        .defaults
+        .iter()
+        .chain(arguments.kw_defaults.iter())
+    {
+        match &expr.node {
+            ExprKind::List { .. }
+            | ExprKind::Dict { .. }
+            | ExprKind::Set { .. }
+            | ExprKind::ListComp { .. }
+            | ExprKind::DictComp { .. }
+            | ExprKind::SetComp { .. } => {
+                checker.add_check(Check::new(
+                    CheckKind::MutableArgumentDefault,
+                    checker.locate_check(Range::from_located(expr)),
+                ));
+            }
+            ExprKind::Call { func, .. } => match &func.node {
+                ExprKind::Name { id, .. }
+                    if id == "dict"
+                        || id == "list"
+                        || id == "set"
+                        || id == "Counter"
+                        || id == "OrderedDict"
+                        || id == "defaultdict"
+                        || id == "deque" =>
+                {
+                    checker.add_check(Check::new(
+                        CheckKind::MutableArgumentDefault,
+                        checker.locate_check(Range::from_located(expr)),
+                    ));
+                }
+                ExprKind::Attribute { value, attr, .. }
+                    if (attr == "Counter"
+                        || attr == "OrderedDict"
+                        || attr == "defaultdict"
+                        || attr == "deque") =>
+                {
+                    match &value.node {
+                        ExprKind::Name { id, .. } if id == "collections" => {
+                            checker.add_check(Check::new(
+                                CheckKind::MutableArgumentDefault,
+                                checker.locate_check(Range::from_located(expr)),
+                            ));
+                        }
+                        _ => {}
+                    }
+                }
+                _ => {}
+            },
+            _ => {}
+        }
+    }
+}
--- a/src/flake8_bugbear/plugins/redundant_tuple_in_exception_handler.rs
+++ b/src/flake8_bugbear/plugins/redundant_tuple_in_exception_handler.rs
@@ -0,0 +1,22 @@
+use rustpython_ast::{Excepthandler, ExcepthandlerKind, ExprKind};
+
+use crate::ast::types::{CheckLocator, Range};
+use crate::check_ast::Checker;
+use crate::checks::{Check, CheckKind};
+
+/// B013
+pub fn redundant_tuple_in_exception_handler(checker: &mut Checker, handlers: &[Excepthandler]) {
+    for handler in handlers {
+        let ExcepthandlerKind::ExceptHandler { type_, .. } = &handler.node;
+        if let Some(type_) = type_ {
+            if let ExprKind::Tuple { elts, .. } = &type_.node {
+                if elts.len() == 1 {
+                    checker.add_check(Check::new(
+                        CheckKind::RedundantTupleInExceptionHandler(elts[0].to_string()),
+                        checker.locate_check(Range::from_located(type_)),
+                    ));
+                }
+            }
+        }
+    }
+}
--- a/src/flake8_comprehensions/checks.rs
+++ b/src/flake8_comprehensions/checks.rs
@@ -1,5 +1,7 @@
 use num_bigint::BigInt;
-use rustpython_ast::{Comprehension, Constant, Expr, ExprKind, KeywordData, Located, Unaryop};
+use rustpython_ast::{
+    Comprehension, Constant, Expr, ExprKind, Keyword, KeywordData, Located, Unaryop,
+};

 use crate::ast::types::Range;
 use crate::checks::{Check, CheckKind};
@@ -16,7 +18,11 @@ fn exactly_one_argument_with_matching_function<'a>(
    name: &str,
    func: &Expr,
    args: &'a [Expr],
+    keywords: &[Keyword],
 ) -> Option<&'a ExprKind> {
+    if !keywords.is_empty() {
+        return None;
+    }
    if args.len() != 1 {
        return None;
    }
@@ -38,8 +44,13 @@ fn first_argument_with_matching_function<'a>(
 }

 /// C400 (`list(generator)`)
-pub fn unnecessary_generator_list(expr: &Expr, func: &Expr, args: &[Expr]) -> Option<Check> {
-    let argument = exactly_one_argument_with_matching_function("list", func, args)?;
+pub fn unnecessary_generator_list(
+    expr: &Expr,
+    func: &Expr,
+    args: &[Expr],
+    keywords: &[Keyword],
+) -> Option<Check> {
+    let argument = exactly_one_argument_with_matching_function("list", func, args, keywords)?;
    if let ExprKind::GeneratorExp { .. } = argument {
        return Some(Check::new(
            CheckKind::UnnecessaryGeneratorList,
@@ -50,8 +61,13 @@ pub fn unnecessary_generator_list(expr: &Expr, func: &Expr, args: &[Expr]) -> Op
 }

 /// C401 (`set(generator)`)
-pub fn unnecessary_generator_set(expr: &Expr, func: &Expr, args: &[Expr]) -> Option<Check> {
-    let argument = exactly_one_argument_with_matching_function("set", func, args)?;
+pub fn unnecessary_generator_set(
+    expr: &Expr,
+    func: &Expr,
+    args: &[Expr],
+    keywords: &[Keyword],
+) -> Option<Check> {
+    let argument = exactly_one_argument_with_matching_function("set", func, args, keywords)?;
    if let ExprKind::GeneratorExp { .. } = argument {
        return Some(Check::new(
            CheckKind::UnnecessaryGeneratorSet,
@@ -62,8 +78,13 @@ pub fn unnecessary_generator_set(expr: &Expr, func: &Expr, args: &[Expr]) -> Opt
 }

 /// C402 (`dict((x, y) for x, y in iterable)`)
-pub fn unnecessary_generator_dict(expr: &Expr, func: &Expr, args: &[Expr]) -> Option<Check> {
-    let argument = exactly_one_argument_with_matching_function("dict", func, args)?;
+pub fn unnecessary_generator_dict(
+    expr: &Expr,
+    func: &Expr,
+    args: &[Expr],
+    keywords: &[Keyword],
+) -> Option<Check> {
+    let argument = exactly_one_argument_with_matching_function("dict", func, args, keywords)?;
    if let ExprKind::GeneratorExp { elt, .. } = argument {
        match &elt.node {
            ExprKind::Tuple { elts, .. } if elts.len() == 2 => {
@@ -83,8 +104,9 @@ pub fn unnecessary_list_comprehension_set(
    expr: &Expr,
    func: &Expr,
    args: &[Expr],
+    keywords: &[Keyword],
 ) -> Option<Check> {
-    let argument = exactly_one_argument_with_matching_function("set", func, args)?;
+    let argument = exactly_one_argument_with_matching_function("set", func, args, keywords)?;
    if let ExprKind::ListComp { .. } = &argument {
        return Some(Check::new(
            CheckKind::UnnecessaryListComprehensionSet,
@@ -99,8 +121,9 @@ pub fn unnecessary_list_comprehension_dict(
    expr: &Expr,
    func: &Expr,
    args: &[Expr],
+    keywords: &[Keyword],
 ) -> Option<Check> {
-    let argument = exactly_one_argument_with_matching_function("dict", func, args)?;
+    let argument = exactly_one_argument_with_matching_function("dict", func, args, keywords)?;
    if let ExprKind::ListComp { elt, .. } = &argument {
        match &elt.node {
            ExprKind::Tuple { elts, .. } if elts.len() == 2 => {
@@ -116,8 +139,13 @@ pub fn unnecessary_list_comprehension_dict(
 }

 /// C405 (`set([1, 2])`)
-pub fn unnecessary_literal_set(expr: &Expr, func: &Expr, args: &[Expr]) -> Option<Check> {
-    let argument = exactly_one_argument_with_matching_function("set", func, args)?;
+pub fn unnecessary_literal_set(
+    expr: &Expr,
+    func: &Expr,
+    args: &[Expr],
+    keywords: &[Keyword],
+) -> Option<Check> {
+    let argument = exactly_one_argument_with_matching_function("set", func, args, keywords)?;
    let kind = match argument {
        ExprKind::List { .. } => "list",
        ExprKind::Tuple { .. } => "tuple",
@@ -130,8 +158,13 @@ pub fn unnecessary_literal_set(expr: &Expr, func: &Expr, args: &[Expr]) -> Optio
 }

 /// C406 (`dict([(1, 2)])`)
-pub fn unnecessary_literal_dict(expr: &Expr, func: &Expr, args: &[Expr]) -> Option<Check> {
-    let argument = exactly_one_argument_with_matching_function("dict", func, args)?;
+pub fn unnecessary_literal_dict(
+    expr: &Expr,
+    func: &Expr,
+    args: &[Expr],
+    keywords: &[Keyword],
+) -> Option<Check> {
+    let argument = exactly_one_argument_with_matching_function("dict", func, args, keywords)?;
    let (kind, elts) = match argument {
        ExprKind::Tuple { elts, .. } => ("tuple", elts),
        ExprKind::List { elts, .. } => ("list", elts),
--- a/src/flake8_quotes/checks.rs
+++ b/src/flake8_quotes/checks.rs
@@ -1,9 +1,9 @@
 use rustpython_ast::Location;

-use crate::ast::operations::SourceCodeLocator;
 use crate::ast::types::Range;
 use crate::checks::{Check, CheckKind};
 use crate::flake8_quotes::settings::{Quote, Settings};
+use crate::source_code_locator::SourceCodeLocator;

 fn good_single(quote: &Quote) -> char {
    match quote {
--- a/src/flake8_quotes/settings.rs
+++ b/src/flake8_quotes/settings.rs
@@ -1,4 +1,4 @@
-//! Settings for the `flake_quotes` plugin.
+//! Settings for the `flake-quotes` plugin.

 use serde::{Deserialize, Serialize};

@@ -27,12 +27,12 @@ pub struct Settings {
 }

 impl Settings {
-    pub fn from_config(config: Options) -> Self {
+    pub fn from_options(options: Options) -> Self {
        Self {
-            inline_quotes: config.inline_quotes.unwrap_or(Quote::Single),
-            multiline_quotes: config.multiline_quotes.unwrap_or(Quote::Double),
-            docstring_quotes: config.docstring_quotes.unwrap_or(Quote::Double),
-            avoid_escape: config.avoid_escape.unwrap_or(true),
+            inline_quotes: options.inline_quotes.unwrap_or(Quote::Single),
+            multiline_quotes: options.multiline_quotes.unwrap_or(Quote::Double),
+            docstring_quotes: options.docstring_quotes.unwrap_or(Quote::Double),
+            avoid_escape: options.avoid_escape.unwrap_or(true),
        }
    }
 }
--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__double_docstring_docstring_doubles.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__double_docstring_docstring_doubles.py.snap
@@ -6,45 +6,45 @@ expression: checks
    BadQuotesMultilineString: single
  location:
    row: 5
-    column: 1
+    column: 0
  end_location:
    row: 7
-    column: 4
+    column: 3
  fix: ~
 - kind:
    BadQuotesMultilineString: single
  location:
    row: 16
-    column: 5
+    column: 4
  end_location:
    row: 18
-    column: 8
+    column: 7
  fix: ~
 - kind:
    BadQuotesMultilineString: single
  location:
    row: 21
-    column: 21
+    column: 20
  end_location:
    row: 22
-    column: 38
+    column: 37
  fix: ~
 - kind:
    BadQuotesMultilineString: single
  location:
    row: 30
-    column: 9
+    column: 8
  end_location:
    row: 32
-    column: 12
+    column: 11
  fix: ~
 - kind:
    BadQuotesMultilineString: single
  location:
    row: 35
-    column: 13
+    column: 12
  end_location:
    row: 37
-    column: 16
+    column: 15
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__double_docstring_docstring_doubles_class.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__double_docstring_docstring_doubles_class.py.snap
@@ -6,18 +6,18 @@ expression: checks
    BadQuotesMultilineString: single
  location:
    row: 3
-    column: 5
+    column: 4
  end_location:
    row: 3
-    column: 28
+    column: 27
  fix: ~
 - kind:
    BadQuotesMultilineString: single
  location:
    row: 5
-    column: 23
+    column: 22
  end_location:
    row: 5
-    column: 44
+    column: 43
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__double_docstring_docstring_doubles_function.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__double_docstring_docstring_doubles_function.py.snap
@@ -6,45 +6,45 @@ expression: checks
    BadQuotesMultilineString: single
  location:
    row: 3
-    column: 5
+    column: 4
  end_location:
    row: 3
-    column: 27
+    column: 26
  fix: ~
 - kind:
    BadQuotesMultilineString: single
  location:
    row: 11
-    column: 5
+    column: 4
  end_location:
    row: 11
-    column: 27
+    column: 26
  fix: ~
 - kind:
    BadQuotesMultilineString: single
  location:
    row: 15
-    column: 39
+    column: 38
  end_location:
+    row: 17
+    column: 3
+  fix: ~
+- kind:
+    BadQuotesMultilineString: single
+  location:
    row: 17
    column: 4
-  fix: ~
- kind:
-    BadQuotesMultilineString: single
-  location:
-    row: 17
-    column: 5
  end_location:
    row: 17
-    column: 20
+    column: 19
  fix: ~
 - kind:
    BadQuotesMultilineString: single
  location:
    row: 21
-    column: 5
+    column: 4
  end_location:
    row: 21
-    column: 28
+    column: 27
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__double_docstring_docstring_doubles_module_multiline.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__double_docstring_docstring_doubles_module_multiline.py.snap
@@ -6,18 +6,18 @@ expression: checks
    BadQuotesMultilineString: single
  location:
    row: 4
-    column: 1
+    column: 0
  end_location:
    row: 6
-    column: 4
+    column: 3
  fix: ~
 - kind:
    BadQuotesMultilineString: single
  location:
    row: 9
-    column: 1
+    column: 0
  end_location:
    row: 11
-    column: 4
+    column: 3
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__double_docstring_docstring_doubles_module_singleline.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__double_docstring_docstring_doubles_module_singleline.py.snap
@@ -6,18 +6,18 @@ expression: checks
    BadQuotesMultilineString: single
  location:
    row: 2
-    column: 1
+    column: 0
  end_location:
    row: 2
-    column: 32
+    column: 31
  fix: ~
 - kind:
    BadQuotesMultilineString: single
  location:
    row: 6
-    column: 1
+    column: 0
  end_location:
    row: 6
-    column: 32
+    column: 31
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__double_docstring_docstring_singles.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__double_docstring_docstring_singles.py.snap
@@ -6,27 +6,27 @@ expression: checks
    BadQuotesDocstring: double
  location:
    row: 1
-    column: 1
+    column: 0
  end_location:
    row: 3
-    column: 4
+    column: 3
  fix: ~
 - kind:
    BadQuotesDocstring: double
  location:
    row: 14
-    column: 5
+    column: 4
  end_location:
    row: 16
-    column: 8
+    column: 7
  fix: ~
 - kind:
    BadQuotesDocstring: double
  location:
    row: 26
-    column: 9
+    column: 8
  end_location:
    row: 28
-    column: 12
+    column: 11
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__double_docstring_docstring_singles_class.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__double_docstring_docstring_singles_class.py.snap
@@ -6,27 +6,27 @@ expression: checks
    BadQuotesDocstring: double
  location:
    row: 2
-    column: 5
+    column: 4
  end_location:
    row: 2
-    column: 54
-  fix: ~
- kind:
-    BadQuotesDocstring: double
-  location:
-    row: 6
-    column: 9
-  end_location:
-    row: 6
-    column: 58
-  fix: ~
- kind:
-    BadQuotesDocstring: double
-  location:
-    row: 9
-    column: 29
-  end_location:
-    row: 9
    column: 53
  fix: ~
+- kind:
+    BadQuotesDocstring: double
+  location:
+    row: 6
+    column: 8
+  end_location:
+    row: 6
+    column: 57
+  fix: ~
+- kind:
+    BadQuotesDocstring: double
+  location:
+    row: 9
+    column: 28
+  end_location:
+    row: 9
+    column: 52
+  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__double_docstring_docstring_singles_function.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__double_docstring_docstring_singles_function.py.snap
@@ -6,18 +6,18 @@ expression: checks
    BadQuotesDocstring: double
  location:
    row: 2
-    column: 5
+    column: 4
  end_location:
    row: 2
-    column: 57
+    column: 56
  fix: ~
 - kind:
    BadQuotesDocstring: double
  location:
    row: 8
-    column: 5
+    column: 4
  end_location:
    row: 10
-    column: 8
+    column: 7
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__double_docstring_docstring_singles_module_multiline.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__double_docstring_docstring_singles_module_multiline.py.snap
@@ -6,9 +6,9 @@ expression: checks
    BadQuotesDocstring: double
  location:
    row: 1
-    column: 1
+    column: 0
  end_location:
    row: 3
-    column: 4
+    column: 3
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__double_docstring_docstring_singles_module_singleline.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__double_docstring_docstring_singles_module_singleline.py.snap
@@ -6,9 +6,9 @@ expression: checks
    BadQuotesDocstring: double
  location:
    row: 1
-    column: 1
+    column: 0
  end_location:
    row: 1
-    column: 50
+    column: 49
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__doubles_doubles.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__doubles_doubles.py.snap
@@ -6,18 +6,18 @@ expression: checks
    BadQuotesInlineString: single
  location:
    row: 1
-    column: 25
+    column: 24
  end_location:
    row: 1
-    column: 46
+    column: 45
  fix: ~
 - kind:
    BadQuotesInlineString: single
  location:
    row: 2
-    column: 25
+    column: 24
  end_location:
    row: 2
-    column: 47
+    column: 46
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__doubles_doubles_escaped.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__doubles_doubles_escaped.py.snap
@@ -5,9 +5,9 @@ expression: checks
 - kind: AvoidQuoteEscape
  location:
    row: 1
-    column: 26
+    column: 25
  end_location:
    row: 1
-    column: 48
+    column: 47
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__doubles_doubles_multiline_string.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__doubles_doubles_multiline_string.py.snap
@@ -6,9 +6,9 @@ expression: checks
    BadQuotesMultilineString: single
  location:
    row: 1
-    column: 5
+    column: 4
  end_location:
    row: 3
-    column: 13
+    column: 12
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__single_docstring_docstring_doubles.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__single_docstring_docstring_doubles.py.snap
@@ -6,27 +6,27 @@ expression: checks
    BadQuotesDocstring: single
  location:
    row: 1
-    column: 1
+    column: 0
  end_location:
    row: 3
-    column: 4
+    column: 3
  fix: ~
 - kind:
    BadQuotesDocstring: single
  location:
    row: 12
-    column: 5
+    column: 4
  end_location:
    row: 14
-    column: 8
+    column: 7
  fix: ~
 - kind:
    BadQuotesDocstring: single
  location:
    row: 24
-    column: 9
+    column: 8
  end_location:
    row: 26
-    column: 12
+    column: 11
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__single_docstring_docstring_doubles_class.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__single_docstring_docstring_doubles_class.py.snap
@@ -6,27 +6,27 @@ expression: checks
    BadQuotesDocstring: single
  location:
    row: 2
-    column: 5
+    column: 4
  end_location:
    row: 2
-    column: 54
-  fix: ~
- kind:
-    BadQuotesDocstring: single
-  location:
-    row: 6
-    column: 9
-  end_location:
-    row: 6
-    column: 58
-  fix: ~
- kind:
-    BadQuotesDocstring: single
-  location:
-    row: 9
-    column: 29
-  end_location:
-    row: 9
    column: 53
  fix: ~
+- kind:
+    BadQuotesDocstring: single
+  location:
+    row: 6
+    column: 8
+  end_location:
+    row: 6
+    column: 57
+  fix: ~
+- kind:
+    BadQuotesDocstring: single
+  location:
+    row: 9
+    column: 28
+  end_location:
+    row: 9
+    column: 52
+  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__single_docstring_docstring_doubles_function.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__single_docstring_docstring_doubles_function.py.snap
@@ -6,18 +6,18 @@ expression: checks
    BadQuotesDocstring: single
  location:
    row: 2
-    column: 5
+    column: 4
  end_location:
    row: 2
-    column: 57
+    column: 56
  fix: ~
 - kind:
    BadQuotesDocstring: single
  location:
    row: 8
-    column: 5
+    column: 4
  end_location:
    row: 10
-    column: 8
+    column: 7
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__single_docstring_docstring_doubles_module_multiline.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__single_docstring_docstring_doubles_module_multiline.py.snap
@@ -6,9 +6,9 @@ expression: checks
    BadQuotesDocstring: single
  location:
    row: 1
-    column: 1
+    column: 0
  end_location:
    row: 3
-    column: 4
+    column: 3
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__single_docstring_docstring_doubles_module_singleline.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__single_docstring_docstring_doubles_module_singleline.py.snap
@@ -6,9 +6,9 @@ expression: checks
    BadQuotesDocstring: single
  location:
    row: 1
-    column: 1
+    column: 0
  end_location:
    row: 1
-    column: 50
+    column: 49
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__single_docstring_docstring_singles.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__single_docstring_docstring_singles.py.snap
@@ -6,54 +6,54 @@ expression: checks
    BadQuotesMultilineString: double
  location:
    row: 5
-    column: 1
+    column: 0
  end_location:
    row: 7
-    column: 4
+    column: 3
  fix: ~
 - kind:
    BadQuotesMultilineString: double
  location:
    row: 11
-    column: 21
+    column: 20
  end_location:
    row: 13
-    column: 4
+    column: 3
  fix: ~
 - kind:
    BadQuotesMultilineString: double
  location:
    row: 18
-    column: 5
+    column: 4
  end_location:
    row: 20
-    column: 8
+    column: 7
  fix: ~
 - kind:
    BadQuotesMultilineString: double
  location:
    row: 23
-    column: 21
+    column: 20
  end_location:
    row: 24
-    column: 38
+    column: 37
  fix: ~
 - kind:
    BadQuotesMultilineString: double
  location:
    row: 32
-    column: 9
+    column: 8
  end_location:
    row: 34
-    column: 12
+    column: 11
  fix: ~
 - kind:
    BadQuotesMultilineString: double
  location:
    row: 37
-    column: 13
+    column: 12
  end_location:
    row: 39
-    column: 16
+    column: 15
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__single_docstring_docstring_singles_class.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__single_docstring_docstring_singles_class.py.snap
@@ -6,18 +6,18 @@ expression: checks
    BadQuotesMultilineString: double
  location:
    row: 3
-    column: 5
+    column: 4
  end_location:
    row: 3
-    column: 28
+    column: 27
  fix: ~
 - kind:
    BadQuotesMultilineString: double
  location:
    row: 5
-    column: 23
+    column: 22
  end_location:
    row: 5
-    column: 44
+    column: 43
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__single_docstring_docstring_singles_function.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__single_docstring_docstring_singles_function.py.snap
@@ -6,45 +6,45 @@ expression: checks
    BadQuotesMultilineString: double
  location:
    row: 3
-    column: 5
+    column: 4
  end_location:
    row: 3
-    column: 27
+    column: 26
  fix: ~
 - kind:
    BadQuotesMultilineString: double
  location:
    row: 11
-    column: 5
+    column: 4
  end_location:
    row: 11
-    column: 27
+    column: 26
  fix: ~
 - kind:
    BadQuotesMultilineString: double
  location:
    row: 15
-    column: 39
+    column: 38
  end_location:
+    row: 17
+    column: 3
+  fix: ~
+- kind:
+    BadQuotesMultilineString: double
+  location:
    row: 17
    column: 4
-  fix: ~
- kind:
-    BadQuotesMultilineString: double
-  location:
-    row: 17
-    column: 5
  end_location:
    row: 17
-    column: 20
+    column: 19
  fix: ~
 - kind:
    BadQuotesMultilineString: double
  location:
    row: 21
-    column: 5
+    column: 4
  end_location:
    row: 21
-    column: 28
+    column: 27
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__single_docstring_docstring_singles_module_multiline.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__single_docstring_docstring_singles_module_multiline.py.snap
@@ -6,18 +6,18 @@ expression: checks
    BadQuotesMultilineString: double
  location:
    row: 4
-    column: 1
+    column: 0
  end_location:
    row: 6
-    column: 4
+    column: 3
  fix: ~
 - kind:
    BadQuotesMultilineString: double
  location:
    row: 9
-    column: 1
+    column: 0
  end_location:
    row: 11
-    column: 4
+    column: 3
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__single_docstring_docstring_singles_module_singleline.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__single_docstring_docstring_singles_module_singleline.py.snap
@@ -6,18 +6,18 @@ expression: checks
    BadQuotesMultilineString: double
  location:
    row: 2
-    column: 1
+    column: 0
  end_location:
    row: 2
-    column: 32
+    column: 31
  fix: ~
 - kind:
    BadQuotesMultilineString: double
  location:
    row: 6
-    column: 1
+    column: 0
  end_location:
    row: 6
-    column: 32
+    column: 31
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__singles_singles.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__singles_singles.py.snap
@@ -6,18 +6,18 @@ expression: checks
    BadQuotesInlineString: double
  location:
    row: 1
-    column: 25
+    column: 24
  end_location:
    row: 1
-    column: 46
+    column: 45
  fix: ~
 - kind:
    BadQuotesInlineString: double
  location:
    row: 2
-    column: 25
+    column: 24
  end_location:
    row: 2
-    column: 47
+    column: 46
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__singles_singles_escaped.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__singles_singles_escaped.py.snap
@@ -5,9 +5,9 @@ expression: checks
 - kind: AvoidQuoteEscape
  location:
    row: 1
-    column: 26
+    column: 25
  end_location:
    row: 1
-    column: 48
+    column: 47
  fix: ~

--- a/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__singles_singles_multiline_string.py.snap
+++ b/src/flake8_quotes/snapshots/ruff__flake8_quotescheckstests__singles_singles_multiline_string.py.snap
@@ -6,9 +6,9 @@ expression: checks
    BadQuotesMultilineString: double
  location:
    row: 1
-    column: 5
+    column: 4
  end_location:
    row: 3
-    column: 13
+    column: 12
  fix: ~

--- a/src/lib.rs
+++ b/src/lib.rs
@@ -44,10 +44,11 @@ mod pyflakes;
 mod python;
 mod pyupgrade;
 pub mod settings;
+pub mod source_code_locator;
 pub mod visibility;

 /// Run ruff over Python source code directly.
-pub fn check(path: &Path, contents: &str, quiet: bool) -> Result<Vec<Message>> {
+pub fn check(path: &Path, contents: &str) -> Result<Vec<Message>> {
    // Find the project root and pyproject.toml.
    let project_root = pyproject::find_project_root(&[path.to_path_buf()]);
    match &project_root {
@@ -60,11 +61,8 @@ pub fn check(path: &Path, contents: &str, quiet: bool) -> Result<Vec<Message>> {
        None => debug!("Unable to find pyproject.toml; using default settings..."),
    };

-    let settings = Settings::from_configuration(Configuration::from_pyproject(
-        &pyproject,
-        &project_root,
-        quiet,
-    )?);
+    let settings =
+        Settings::from_configuration(Configuration::from_pyproject(&pyproject, &project_root)?);

    // Tokenize once.
    let tokens: Vec<LexResult> = tokenize(contents);
--- a/src/linter.rs
+++ b/src/linter.rs
@@ -6,7 +6,10 @@ use std::path::Path;
 use anyhow::Result;
 #[cfg(not(target_family = "wasm"))]
 use log::debug;
+use rustpython_ast::{Mod, Suite};
+use rustpython_parser::error::ParseError;
 use rustpython_parser::lexer::LexResult;
+use rustpython_parser::parser::Mode;
 use rustpython_parser::{lexer, parser};

 use crate::ast::types::Range;
@@ -20,6 +23,7 @@ use crate::code_gen::SourceGenerator;
 use crate::message::Message;
 use crate::noqa::add_noqa;
 use crate::settings::Settings;
+use crate::source_code_locator::SourceCodeLocator;
 use crate::{cache, fs, noqa};

 /// Collect tokens up to and including the first error.
@@ -35,6 +39,17 @@ pub(crate) fn tokenize(contents: &str) -> Vec<LexResult> {
    tokens
 }

+/// Parse a full Python program from its tokens.
+pub(crate) fn parse_program_tokens(
+    lxr: Vec<LexResult>,
+    source_path: &str,
+) -> Result<Suite, ParseError> {
+    parser::parse_tokens(lxr, Mode::Module, source_path).map(|top| match top {
+        Mod::Module { body, .. } => body,
+        _ => unreachable!(),
+    })
+}
+
 pub(crate) fn check_path(
    path: &Path,
    contents: &str,
@@ -46,13 +61,16 @@ pub(crate) fn check_path(
    // Aggregate all checks.
    let mut checks: Vec<Check> = vec![];

+    // Initialize the SourceCodeLocator (which computes offsets lazily).
+    let locator = SourceCodeLocator::new(contents);
+
    // Run the token-based checks.
    if settings
        .enabled
        .iter()
        .any(|check_code| matches!(check_code.lint_source(), LintSource::Tokens))
    {
-        check_tokens(&mut checks, contents, &tokens, settings);
+        check_tokens(&mut checks, &locator, &tokens, settings);
    }

    // Run the AST-based checks.
@@ -61,9 +79,9 @@ pub(crate) fn check_path(
        .iter()
        .any(|check_code| matches!(check_code.lint_source(), LintSource::AST))
    {
-        match parser::parse_program_tokens(tokens, "<filename>") {
+        match parse_program_tokens(tokens, "<filename>") {
            Ok(python_ast) => {
-                checks.extend(check_ast(&python_ast, contents, settings, autofix, path))
+                checks.extend(check_ast(&python_ast, &locator, settings, autofix, path))
            }
            Err(parse_error) => {
                if settings.enabled.contains(&CheckCode::E999) {
@@ -216,7 +234,7 @@ pub fn autoformat_path(path: &Path) -> Result<()> {
    let tokens: Vec<LexResult> = tokenize(&contents);

    // Generate the AST.
-    let python_ast = parser::parse_program_tokens(tokens, "<filename>")?;
+    let python_ast = parse_program_tokens(tokens, "<filename>")?;
    let mut generator: SourceGenerator = Default::default();
    generator.unparse_suite(&python_ast)?;
    write(path, generator.generate()?)?;
@@ -252,8 +270,10 @@ mod tests {
    #[test_case(CheckCode::A002, Path::new("A002.py"); "A002")]
    #[test_case(CheckCode::A003, Path::new("A003.py"); "A003")]
    #[test_case(CheckCode::B002, Path::new("B002.py"); "B002")]
+    #[test_case(CheckCode::B006, Path::new("B006_B008.py"); "B006")]
    #[test_case(CheckCode::B007, Path::new("B007.py"); "B007")]
    #[test_case(CheckCode::B011, Path::new("B011.py"); "B011")]
+    #[test_case(CheckCode::B013, Path::new("B013.py"); "B013")]
    #[test_case(CheckCode::B014, Path::new("B014.py"); "B014")]
    #[test_case(CheckCode::B017, Path::new("B017.py"); "B017")]
    #[test_case(CheckCode::B025, Path::new("B025.py"); "B025")]
@@ -368,12 +388,16 @@ mod tests {
    #[test_case(CheckCode::N803, Path::new("N803.py"); "N803")]
    #[test_case(CheckCode::N804, Path::new("N804.py"); "N804")]
    #[test_case(CheckCode::N805, Path::new("N805.py"); "N805")]
+    #[test_case(CheckCode::N806, Path::new("N806.py"); "N806")]
    #[test_case(CheckCode::N807, Path::new("N807.py"); "N807")]
    #[test_case(CheckCode::N811, Path::new("N811.py"); "N811")]
    #[test_case(CheckCode::N812, Path::new("N812.py"); "N812")]
    #[test_case(CheckCode::N813, Path::new("N813.py"); "N813")]
    #[test_case(CheckCode::N814, Path::new("N814.py"); "N814")]
+    #[test_case(CheckCode::N815, Path::new("N815.py"); "N815")]
+    #[test_case(CheckCode::N816, Path::new("N816.py"); "N816")]
    #[test_case(CheckCode::N817, Path::new("N817.py"); "N817")]
+    #[test_case(CheckCode::N818, Path::new("N818.py"); "N818")]
    #[test_case(CheckCode::T201, Path::new("T201.py"); "T201")]
    #[test_case(CheckCode::T203, Path::new("T203.py"); "T203")]
    #[test_case(CheckCode::U001, Path::new("U001.py"); "U001")]
--- a/src/main.rs
+++ b/src/main.rs
@@ -261,7 +261,7 @@ fn inner_main() -> Result<ExitCode> {
        .map(|pair| PerFileIgnore::new(pair, &project_root))
        .collect();

-    let mut configuration = Configuration::from_pyproject(&pyproject, &project_root, cli.quiet)?;
+    let mut configuration = Configuration::from_pyproject(&pyproject, &project_root)?;
    if !exclude.is_empty() {
        configuration.exclude = exclude;
    }
--- a/src/noqa.rs
+++ b/src/noqa.rs
@@ -246,8 +246,8 @@ ghi
        let checks = vec![Check::new(
            CheckKind::UnusedVariable("x".to_string()),
            Range {
-                location: Location::new(1, 1),
-                end_location: Location::new(1, 1),
+                location: Location::new(1, 0),
+                end_location: Location::new(1, 0),
            },
        )];
        let contents = "x = 1";
@@ -260,15 +260,15 @@ ghi
            Check::new(
                CheckKind::AmbiguousVariableName("x".to_string()),
                Range {
-                    location: Location::new(1, 1),
-                    end_location: Location::new(1, 1),
+                    location: Location::new(1, 0),
+                    end_location: Location::new(1, 0),
                },
            ),
            Check::new(
                CheckKind::UnusedVariable("x".to_string()),
                Range {
-                    location: Location::new(1, 1),
-                    end_location: Location::new(1, 1),
+                    location: Location::new(1, 0),
+                    end_location: Location::new(1, 0),
                },
            ),
        ];
@@ -282,15 +282,15 @@ ghi
            Check::new(
                CheckKind::AmbiguousVariableName("x".to_string()),
                Range {
-                    location: Location::new(1, 1),
-                    end_location: Location::new(1, 1),
+                    location: Location::new(1, 0),
+                    end_location: Location::new(1, 0),
                },
            ),
            Check::new(
                CheckKind::UnusedVariable("x".to_string()),
                Range {
-                    location: Location::new(1, 1),
-                    end_location: Location::new(1, 1),
+                    location: Location::new(1, 0),
+                    end_location: Location::new(1, 0),
                },
            ),
        ];
--- a/src/pep8_naming/checks.rs
+++ b/src/pep8_naming/checks.rs
@@ -1,9 +1,11 @@
 use itertools::Itertools;
 use rustpython_ast::{Arguments, Expr, ExprKind, Stmt};

-use crate::ast::types::{Range, Scope, ScopeKind};
+use crate::ast::types::{FunctionScope, Range, Scope, ScopeKind};
 use crate::checks::{Check, CheckKind};
+use crate::pep8_naming::settings::Settings;

+/// N801
 pub fn invalid_class_name(class_def: &Stmt, name: &str) -> Option<Check> {
    let stripped = name.strip_prefix('_').unwrap_or(name);
    if !stripped
@@ -21,8 +23,14 @@ pub fn invalid_class_name(class_def: &Stmt, name: &str) -> Option<Check> {
    None
 }

-pub fn invalid_function_name(func_def: &Stmt, name: &str) -> Option<Check> {
-    if name.chars().any(|c| c.is_uppercase()) {
+/// N802
+pub fn invalid_function_name(func_def: &Stmt, name: &str, settings: &Settings) -> Option<Check> {
+    if !is_lower(name)
+        && !settings
+            .ignore_names
+            .iter()
+            .any(|ignore_name| ignore_name == name)
+    {
        return Some(Check::new(
            CheckKind::InvalidFunctionName(name.to_string()),
            Range::from_located(func_def),
@@ -31,8 +39,9 @@ pub fn invalid_function_name(func_def: &Stmt, name: &str) -> Option<Check> {
    None
 }

+/// N803
 pub fn invalid_argument_name(location: Range, name: &str) -> Option<Check> {
-    if name.chars().any(|c| c.is_uppercase()) {
+    if !is_lower(name) {
        return Some(Check::new(
            CheckKind::InvalidArgumentName(name.to_string()),
            location,
@@ -41,10 +50,12 @@ pub fn invalid_argument_name(location: Range, name: &str) -> Option<Check> {
    None
 }

+/// N804
 pub fn invalid_first_argument_name_for_class_method(
    scope: &Scope,
    decorator_list: &[Expr],
    args: &Arguments,
+    settings: &Settings,
 ) -> Option<Check> {
    if !matches!(scope.kind, ScopeKind::Class) {
        return None;
@@ -52,7 +63,7 @@ pub fn invalid_first_argument_name_for_class_method(

    if decorator_list.iter().any(|decorator| {
        if let ExprKind::Name { id, .. } = &decorator.node {
-            id == "classmethod"
+            settings.classmethod_decorators.contains(id)
        } else {
            false
        }
@@ -69,10 +80,12 @@ pub fn invalid_first_argument_name_for_class_method(
    None
 }

+/// N805
 pub fn invalid_first_argument_name_for_method(
    scope: &Scope,
    decorator_list: &[Expr],
    args: &Arguments,
+    settings: &Settings,
 ) -> Option<Check> {
    if !matches!(scope.kind, ScopeKind::Class) {
        return None;
@@ -80,7 +93,8 @@ pub fn invalid_first_argument_name_for_method(

    if decorator_list.iter().any(|decorator| {
        if let ExprKind::Name { id, .. } = &decorator.node {
-            id == "classmethod" || id == "staticmethod"
+            settings.classmethod_decorators.contains(id)
+                || settings.staticmethod_decorators.contains(id)
        } else {
            false
        }
@@ -99,6 +113,21 @@ pub fn invalid_first_argument_name_for_method(
    None
 }

+/// N806
+pub fn non_lowercase_variable_in_function(scope: &Scope, expr: &Expr, name: &str) -> Option<Check> {
+    if !matches!(scope.kind, ScopeKind::Function(FunctionScope { .. })) {
+        return None;
+    }
+    if !is_lower(name) {
+        return Some(Check::new(
+            CheckKind::NonLowercaseVariableInFunction(name.to_string()),
+            Range::from_located(expr),
+        ));
+    }
+    None
+}
+
+/// N807
 pub fn dunder_function_name(func_def: &Stmt, scope: &Scope, name: &str) -> Option<Check> {
    if matches!(scope.kind, ScopeKind::Class) {
        return None;
@@ -114,6 +143,136 @@ pub fn dunder_function_name(func_def: &Stmt, scope: &Scope, name: &str) -> Optio
    None
 }

+/// N811
+pub fn constant_imported_as_non_constant(
+    import_from: &Stmt,
+    name: &str,
+    asname: &str,
+) -> Option<Check> {
+    if is_upper(name) && !is_upper(asname) {
+        return Some(Check::new(
+            CheckKind::ConstantImportedAsNonConstant(name.to_string(), asname.to_string()),
+            Range::from_located(import_from),
+        ));
+    }
+    None
+}
+
+/// N812
+pub fn lowercase_imported_as_non_lowercase(
+    import_from: &Stmt,
+    name: &str,
+    asname: &str,
+) -> Option<Check> {
+    if is_lower(name) && asname.to_lowercase() != asname {
+        return Some(Check::new(
+            CheckKind::LowercaseImportedAsNonLowercase(name.to_string(), asname.to_string()),
+            Range::from_located(import_from),
+        ));
+    }
+    None
+}
+
+/// N813
+pub fn camelcase_imported_as_lowercase(
+    import_from: &Stmt,
+    name: &str,
+    asname: &str,
+) -> Option<Check> {
+    if is_camelcase(name) && is_lower(asname) {
+        return Some(Check::new(
+            CheckKind::CamelcaseImportedAsLowercase(name.to_string(), asname.to_string()),
+            Range::from_located(import_from),
+        ));
+    }
+    None
+}
+
+/// N814
+pub fn camelcase_imported_as_constant(
+    import_from: &Stmt,
+    name: &str,
+    asname: &str,
+) -> Option<Check> {
+    if is_camelcase(name) && is_upper(asname) && !is_acronym(name, asname) {
+        return Some(Check::new(
+            CheckKind::CamelcaseImportedAsConstant(name.to_string(), asname.to_string()),
+            Range::from_located(import_from),
+        ));
+    }
+    None
+}
+
+/// N815
+pub fn mixed_case_variable_in_class_scope(scope: &Scope, expr: &Expr, name: &str) -> Option<Check> {
+    if !matches!(scope.kind, ScopeKind::Class) {
+        return None;
+    }
+    if is_mixed_case(name) {
+        return Some(Check::new(
+            CheckKind::MixedCaseVariableInClassScope(name.to_string()),
+            Range::from_located(expr),
+        ));
+    }
+    None
+}
+
+/// N816
+pub fn mixed_case_variable_in_global_scope(
+    scope: &Scope,
+    expr: &Expr,
+    name: &str,
+) -> Option<Check> {
+    if !matches!(scope.kind, ScopeKind::Module) {
+        return None;
+    }
+    if is_mixed_case(name) {
+        return Some(Check::new(
+            CheckKind::MixedCaseVariableInGlobalScope(name.to_string()),
+            Range::from_located(expr),
+        ));
+    }
+    None
+}
+
+/// N817
+pub fn camelcase_imported_as_acronym(
+    import_from: &Stmt,
+    name: &str,
+    asname: &str,
+) -> Option<Check> {
+    if is_camelcase(name) && is_upper(asname) && is_acronym(name, asname) {
+        return Some(Check::new(
+            CheckKind::CamelcaseImportedAsAcronym(name.to_string(), asname.to_string()),
+            Range::from_located(import_from),
+        ));
+    }
+    None
+}
+
+/// N818
+pub fn error_suffix_on_exception_name(
+    class_def: &Stmt,
+    bases: &[Expr],
+    name: &str,
+) -> Option<Check> {
+    if bases.iter().any(|base| {
+        if let ExprKind::Name { id, .. } = &base.node {
+            id == "Exception"
+        } else {
+            false
+        }
+    }) {
+        if !name.ends_with("Error") {
+            return Some(Check::new(
+                CheckKind::ErrorSuffixOnExceptionName(name.to_string()),
+                Range::from_located(class_def),
+            ));
+        }
+    }
+    None
+}
+
 fn is_lower(s: &str) -> bool {
    let mut cased = false;
    for c in s.chars() {
@@ -138,86 +297,27 @@ fn is_upper(s: &str) -> bool {
    cased
 }

-pub fn constant_imported_as_non_constant(
-    import_from: &Stmt,
-    name: &str,
-    asname: &str,
-) -> Option<Check> {
-    if is_upper(name) && !is_upper(asname) {
-        return Some(Check::new(
-            CheckKind::ConstantImportedAsNonConstant(name.to_string(), asname.to_string()),
-            Range::from_located(import_from),
-        ));
-    }
-    None
-}
-
-pub fn lowercase_imported_as_non_lowercase(
-    import_from: &Stmt,
-    name: &str,
-    asname: &str,
-) -> Option<Check> {
-    if is_lower(name) && asname.to_lowercase() != asname {
-        return Some(Check::new(
-            CheckKind::LowercaseImportedAsNonLowercase(name.to_string(), asname.to_string()),
-            Range::from_located(import_from),
-        ));
-    }
-    None
-}
-
 fn is_camelcase(name: &str) -> bool {
    !is_lower(name) && !is_upper(name) && !name.contains('_')
 }
+
+fn is_mixed_case(name: &str) -> bool {
+    !is_lower(name)
+        && name
+            .strip_prefix('_')
+            .unwrap_or(name)
+            .chars()
+            .next()
+            .map_or_else(|| false, |c| c.is_lowercase())
+}
+
 fn is_acronym(name: &str, asname: &str) -> bool {
    name.chars().filter(|c| c.is_uppercase()).join("") == asname
 }

-pub fn camelcase_imported_as_lowercase(
-    import_from: &Stmt,
-    name: &str,
-    asname: &str,
-) -> Option<Check> {
-    if is_camelcase(name) && is_lower(asname) {
-        return Some(Check::new(
-            CheckKind::CamelcaseImportedAsLowercase(name.to_string(), asname.to_string()),
-            Range::from_located(import_from),
-        ));
-    }
-    None
-}
-
-pub fn camelcase_imported_as_constant(
-    import_from: &Stmt,
-    name: &str,
-    asname: &str,
-) -> Option<Check> {
-    if is_camelcase(name) && is_upper(asname) && !is_acronym(name, asname) {
-        return Some(Check::new(
-            CheckKind::CamelcaseImportedAsConstant(name.to_string(), asname.to_string()),
-            Range::from_located(import_from),
-        ));
-    }
-    None
-}
-
-pub fn camelcase_imported_as_acronym(
-    import_from: &Stmt,
-    name: &str,
-    asname: &str,
-) -> Option<Check> {
-    if is_camelcase(name) && is_upper(asname) && is_acronym(name, asname) {
-        return Some(Check::new(
-            CheckKind::CamelcaseImportedAsAcronym(name.to_string(), asname.to_string()),
-            Range::from_located(import_from),
-        ));
-    }
-    None
-}
-
 #[cfg(test)]
 mod tests {
-    use super::{is_acronym, is_camelcase, is_lower, is_upper};
+    use super::{is_acronym, is_camelcase, is_lower, is_mixed_case, is_upper};

    #[test]
    fn test_is_lower() -> () {
@@ -251,6 +351,17 @@ mod tests {
        assert!(!is_camelcase("CAMEL_CASE"));
    }

+    #[test]
+    fn test_is_mixed_case() -> () {
+        assert!(is_mixed_case("mixedCase"));
+        assert!(is_mixed_case("mixed_Case"));
+        assert!(is_mixed_case("_mixed_Case"));
+        assert!(!is_mixed_case("mixed_case"));
+        assert!(!is_mixed_case("MIXED_CASE"));
+        assert!(!is_mixed_case(""));
+        assert!(!is_mixed_case("_"));
+    }
+
    #[test]
    fn test_is_acronym() -> () {
        assert!(is_acronym("AB", "AB"));
--- a/src/pep8_naming/mod.rs
+++ b/src/pep8_naming/mod.rs
@@ -1 +1,2 @@
 pub mod checks;
+pub mod settings;
--- a/src/pep8_naming/settings.rs
+++ b/src/pep8_naming/settings.rs
@@ -0,0 +1,63 @@
+//! Settings for the `pep8-naming` plugin.
+
+use serde::Deserialize;
+
+const IGNORE_NAMES: [&str; 12] = [
+    "setUp",
+    "tearDown",
+    "setUpClass",
+    "tearDownClass",
+    "setUpModule",
+    "tearDownModule",
+    "asyncSetUp",
+    "asyncTearDown",
+    "setUpTestData",
+    "failureException",
+    "longMessage",
+    "maxDiff",
+];
+
+const CLASSMETHOD_DECORATORS: [&str; 1] = ["classmethod"];
+
+const STATICMETHOD_DECORATORS: [&str; 1] = ["staticmethod"];
+
+#[derive(Debug, PartialEq, Eq, Deserialize)]
+#[serde(deny_unknown_fields, rename_all = "kebab-case")]
+pub struct Options {
+    pub ignore_names: Option<Vec<String>>,
+    pub classmethod_decorators: Option<Vec<String>>,
+    pub staticmethod_decorators: Option<Vec<String>>,
+}
+
+#[derive(Debug)]
+pub struct Settings {
+    pub ignore_names: Vec<String>,
+    pub classmethod_decorators: Vec<String>,
+    pub staticmethod_decorators: Vec<String>,
+}
+
+impl Settings {
+    pub fn from_options(options: Options) -> Self {
+        Self {
+            ignore_names: options
+                .ignore_names
+                .unwrap_or_else(|| IGNORE_NAMES.map(String::from).to_vec()),
+            classmethod_decorators: options
+                .classmethod_decorators
+                .unwrap_or_else(|| CLASSMETHOD_DECORATORS.map(String::from).to_vec()),
+            staticmethod_decorators: options
+                .staticmethod_decorators
+                .unwrap_or_else(|| STATICMETHOD_DECORATORS.map(String::from).to_vec()),
+        }
+    }
+}
+
+impl Default for Settings {
+    fn default() -> Self {
+        Self {
+            ignore_names: IGNORE_NAMES.map(String::from).to_vec(),
+            classmethod_decorators: CLASSMETHOD_DECORATORS.map(String::from).to_vec(),
+            staticmethod_decorators: STATICMETHOD_DECORATORS.map(String::from).to_vec(),
+        }
+    }
+}
--- a/src/pycodestyle/checks.rs
+++ b/src/pycodestyle/checks.rs
@@ -2,9 +2,9 @@ use itertools::izip;
 use rustpython_ast::Location;
 use rustpython_parser::ast::{Cmpop, Constant, Expr, ExprKind, Unaryop};

-use crate::ast::operations::SourceCodeLocator;
 use crate::ast::types::{CheckLocator, Range};
 use crate::checks::{Check, CheckKind, RejectedCmpop};
+use crate::source_code_locator::SourceCodeLocator;

 fn is_ambiguous_name(name: &str) -> bool {
    name == "l" || name == "I" || name == "O"
--- a/src/pydocstyle/plugins.rs
+++ b/src/pydocstyle/plugins.rs
@@ -35,8 +35,8 @@ pub fn not_missing(
                checker.add_check(Check::new(
                    CheckKind::PublicModule,
                    Range {
-                        location: Location::new(1, 1),
-                        end_location: Location::new(1, 1),
+                        location: Location::new(1, 0),
+                        end_location: Location::new(1, 0),
                    },
                ));
            }
@@ -47,8 +47,8 @@ pub fn not_missing(
                checker.add_check(Check::new(
                    CheckKind::PublicPackage,
                    Range {
-                        location: Location::new(1, 1),
-                        end_location: Location::new(1, 1),
+                        location: Location::new(1, 0),
+                        end_location: Location::new(1, 0),
                    },
                ));
            }
@@ -162,7 +162,7 @@ pub fn blank_before_after_function(checker: &mut Checker, definition: &Definitio
            } = &docstring.node
            {
                if checker.settings.enabled.contains(&CheckCode::D201) {
-                    let (before, _, _) = checker.get_locator().partition_source_code_at(
+                    let (before, _, _) = checker.locator.partition_source_code_at(
                        &Range::from_located(parent),
                        &Range::from_located(docstring),
                    );
@@ -181,8 +181,8 @@ pub fn blank_before_after_function(checker: &mut Checker, definition: &Definitio
                        if checker.patch() {
                            // Delete the blank line before the docstring.
                            check.amend(Fix::deletion(
-                                Location::new(docstring.location.row() - blank_lines_before, 1),
-                                Location::new(docstring.location.row(), 1),
+                                Location::new(docstring.location.row() - blank_lines_before, 0),
+                                Location::new(docstring.location.row(), 0),
                            ));
                        }
                        checker.add_check(check);
@@ -190,7 +190,7 @@ pub fn blank_before_after_function(checker: &mut Checker, definition: &Definitio
                }

                if checker.settings.enabled.contains(&CheckCode::D202) {
-                    let (_, _, after) = checker.get_locator().partition_source_code_at(
+                    let (_, _, after) = checker.locator.partition_source_code_at(
                        &Range::from_located(parent),
                        &Range::from_located(docstring),
                    );
@@ -208,15 +208,13 @@ pub fn blank_before_after_function(checker: &mut Checker, definition: &Definitio
                        .skip(1)
                        .take_while(|line| line.trim().is_empty())
                        .count();
-                    // Report a D202 violation if the docstring is followed by a blank line and the
-                    // blank line is not itself followed by an inner function or class.
-                    let expected_blank_lines_after =
-                        if INNER_FUNCTION_OR_CLASS_REGEX.is_match(after) {
-                            1
-                        } else {
-                            0
-                        };
-                    if blank_lines_after != expected_blank_lines_after {
+
+                    // Avoid D202 violations for blank lines followed by inner functions or classes.
+                    if blank_lines_after == 1 && INNER_FUNCTION_OR_CLASS_REGEX.is_match(after) {
+                        return;
+                    }
+
+                    if blank_lines_after != 0 {
                        let mut check = Check::new(
                            CheckKind::NoBlankLineAfterFunction(blank_lines_after),
                            Range::from_located(docstring),
@@ -224,11 +222,8 @@ pub fn blank_before_after_function(checker: &mut Checker, definition: &Definitio
                        if checker.patch() {
                            // Delete the blank line after the docstring.
                            check.amend(Fix::deletion(
-                                Location::new(
-                                    docstring.location.row() + 1 + expected_blank_lines_after,
-                                    1,
-                                ),
-                                Location::new(docstring.location.row() + 1 + blank_lines_after, 1),
+                                Location::new(docstring.location.row() + 1, 0),
+                                Location::new(docstring.location.row() + 1 + blank_lines_after, 0),
                            ));
                        }
                        checker.add_check(check);
@@ -253,7 +248,7 @@ pub fn blank_before_after_class(checker: &mut Checker, definition: &Definition)
                if checker.settings.enabled.contains(&CheckCode::D203)
                    || checker.settings.enabled.contains(&CheckCode::D211)
                {
-                    let (before, _, _) = checker.get_locator().partition_source_code_at(
+                    let (before, _, _) = checker.locator.partition_source_code_at(
                        &Range::from_located(parent),
                        &Range::from_located(docstring),
                    );
@@ -273,8 +268,8 @@ pub fn blank_before_after_class(checker: &mut Checker, definition: &Definition)
                            if checker.patch() {
                                // Delete the blank line before the class.
                                check.amend(Fix::deletion(
-                                    Location::new(docstring.location.row() - blank_lines_before, 1),
-                                    Location::new(docstring.location.row(), 1),
+                                    Location::new(docstring.location.row() - blank_lines_before, 0),
+                                    Location::new(docstring.location.row(), 0),
                                ));
                            }
                            checker.add_check(check);
@@ -290,8 +285,8 @@ pub fn blank_before_after_class(checker: &mut Checker, definition: &Definition)
                                // Insert one blank line before the class.
                                check.amend(Fix::replacement(
                                    "\n".to_string(),
-                                    Location::new(docstring.location.row() - blank_lines_before, 1),
-                                    Location::new(docstring.location.row(), 1),
+                                    Location::new(docstring.location.row() - blank_lines_before, 0),
+                                    Location::new(docstring.location.row(), 0),
                                ));
                            }
                            checker.add_check(check);
@@ -300,7 +295,7 @@ pub fn blank_before_after_class(checker: &mut Checker, definition: &Definition)
                }

                if checker.settings.enabled.contains(&CheckCode::D204) {
-                    let (_, _, after) = checker.get_locator().partition_source_code_at(
+                    let (_, _, after) = checker.locator.partition_source_code_at(
                        &Range::from_located(parent),
                        &Range::from_located(docstring),
                    );
@@ -327,10 +322,10 @@ pub fn blank_before_after_class(checker: &mut Checker, definition: &Definition)
                            // Insert a blank line before the class (replacing any existing lines).
                            check.amend(Fix::replacement(
                                "\n".to_string(),
-                                Location::new(docstring.end_location.unwrap().row() + 1, 1),
+                                Location::new(docstring.end_location.unwrap().row() + 1, 0),
                                Location::new(
                                    docstring.end_location.unwrap().row() + 1 + blank_lines_after,
-                                    1,
+                                    0,
                                ),
                            ));
                        }
@@ -369,8 +364,8 @@ pub fn blank_after_summary(checker: &mut Checker, definition: &Definition) {
                    // Insert one blank line after the summary (replacing any existing lines).
                    check.amend(Fix::replacement(
                        "\n".to_string(),
-                        Location::new(docstring.location.row() + 1, 1),
-                        Location::new(docstring.location.row() + 1 + blanks_count, 1),
+                        Location::new(docstring.location.row() + 1, 0),
+                        Location::new(docstring.location.row() + 1 + blanks_count, 0),
                    ));
                }
                checker.add_check(check);
@@ -404,7 +399,8 @@ pub fn indent(checker: &mut Checker, definition: &Definition) {

                // Omit empty lines, except for the last line, which is non-empty by way of
                // containing the closing quotation marks.
-                if i < lines.len() - 1 && lines[i].trim().is_empty() {
+                let is_blank = lines[i].trim().is_empty();
+                if i < lines.len() - 1 && is_blank {
                    continue;
                }

@@ -416,19 +412,19 @@ pub fn indent(checker: &mut Checker, definition: &Definition) {
                if checker.settings.enabled.contains(&CheckCode::D207) {
                    // We report under-indentation on every line. This isn't great, but enables
                    // autofix.
-                    if line_indent.len() < docstring_indent.len() {
+                    if !is_blank && line_indent.len() < docstring_indent.len() {
                        let mut check = Check::new(
                            CheckKind::NoUnderIndentation,
                            Range {
-                                location: Location::new(docstring.location.row() + i, 1),
-                                end_location: Location::new(docstring.location.row() + i, 1),
+                                location: Location::new(docstring.location.row() + i, 0),
+                                end_location: Location::new(docstring.location.row() + i, 0),
                            },
                        );
                        if checker.patch() {
                            check.amend(Fix::replacement(
                                helpers::clean(&docstring_indent),
-                                Location::new(docstring.location.row() + i, 1),
-                                Location::new(docstring.location.row() + i, 1 + line_indent.len()),
+                                Location::new(docstring.location.row() + i, 0),
+                                Location::new(docstring.location.row() + i, line_indent.len()),
                            ));
                        }
                        checker.add_check(check);
@@ -469,18 +465,15 @@ pub fn indent(checker: &mut Checker, definition: &Definition) {
                            let mut check = Check::new(
                                CheckKind::NoOverIndentation,
                                Range {
-                                    location: Location::new(docstring.location.row() + i, 1),
-                                    end_location: Location::new(docstring.location.row() + i, 1),
+                                    location: Location::new(docstring.location.row() + i, 0),
+                                    end_location: Location::new(docstring.location.row() + i, 0),
                                },
                            );
                            if checker.patch() {
                                check.amend(Fix::replacement(
                                    helpers::clean(&docstring_indent),
-                                    Location::new(docstring.location.row() + i, 1),
-                                    Location::new(
-                                        docstring.location.row() + i,
-                                        1 + line_indent.len(),
-                                    ),
+                                    Location::new(docstring.location.row() + i, 0),
+                                    Location::new(docstring.location.row() + i, line_indent.len()),
                                ));
                            }
                            checker.add_check(check);
@@ -496,15 +489,15 @@ pub fn indent(checker: &mut Checker, definition: &Definition) {
                        let mut check = Check::new(
                            CheckKind::NoOverIndentation,
                            Range {
-                                location: Location::new(docstring.location.row() + i, 1),
-                                end_location: Location::new(docstring.location.row() + i, 1),
+                                location: Location::new(docstring.location.row() + i, 0),
+                                end_location: Location::new(docstring.location.row() + i, 0),
                            },
                        );
                        if checker.patch() {
                            check.amend(Fix::replacement(
                                helpers::clean(&docstring_indent),
-                                Location::new(docstring.location.row() + i, 1),
-                                Location::new(docstring.location.row() + i, 1 + line_indent.len()),
+                                Location::new(docstring.location.row() + i, 0),
+                                Location::new(docstring.location.row() + i, line_indent.len()),
                            ));
                        }
                        checker.add_check(check);
@@ -530,7 +523,7 @@ pub fn newline_after_last_paragraph(checker: &mut Checker, definition: &Definiti
                }
                if line_count > 1 {
                    let content = checker
-                        .get_locator()
+                        .locator
                        .slice_source_code_range(&Range::from_located(docstring));
                    if let Some(last_line) = content.lines().last().map(|line| line.trim()) {
                        if last_line != "\"\"\"" && last_line != "'''" {
@@ -583,7 +576,7 @@ pub fn no_surrounding_whitespace(checker: &mut Checker, definition: &Definition)
                    );
                    if checker.patch() {
                        if let Some(first_line) = checker
-                            .get_locator()
+                            .locator
                            .slice_source_code_range(&Range::from_located(docstring))
                            .lines()
                            .next()
@@ -629,7 +622,7 @@ pub fn multi_line_summary_start(checker: &mut Checker, definition: &Definition)
        {
            if string.lines().nth(1).is_some() {
                if let Some(first_line) = checker
-                    .get_locator()
+                    .locator
                    .slice_source_code_range(&Range::from_located(docstring))
                    .lines()
                    .next()
@@ -665,7 +658,7 @@ pub fn triple_quotes(checker: &mut Checker, definition: &Definition) {
        } = &docstring.node
        {
            if let Some(first_line) = checker
-                .get_locator()
+                .locator
                .slice_source_code_range(&Range::from_located(docstring))
                .lines()
                .next()
@@ -925,7 +918,7 @@ fn blanks_and_section_underline(
                );
                check.amend(Fix::insertion(
                    content,
-                    Location::new(docstring.location.row() + context.original_index + 1, 1),
+                    Location::new(docstring.location.row() + context.original_index + 1, 0),
                ));
            }
            checker.add_check(check);
@@ -959,7 +952,7 @@ fn blanks_and_section_underline(
                );
                check.amend(Fix::insertion(
                    content,
-                    Location::new(docstring.location.row() + context.original_index + 1, 1),
+                    Location::new(docstring.location.row() + context.original_index + 1, 0),
                ));
            }
            checker.add_check(check);
@@ -975,13 +968,13 @@ fn blanks_and_section_underline(
                if checker.patch() {
                    // Delete any blank lines between the header and content.
                    check.amend(Fix::deletion(
-                        Location::new(docstring.location.row() + context.original_index + 1, 1),
+                        Location::new(docstring.location.row() + context.original_index + 1, 0),
                        Location::new(
                            docstring.location.row()
                                + context.original_index
                                + 1
                                + blank_lines_after_header,
-                            1,
+                            0,
                        ),
                    ));
                }
@@ -998,13 +991,13 @@ fn blanks_and_section_underline(
                if checker.patch() {
                    // Delete any blank lines between the header and the underline.
                    check.amend(Fix::deletion(
-                        Location::new(docstring.location.row() + context.original_index + 1, 1),
+                        Location::new(docstring.location.row() + context.original_index + 1, 0),
                        Location::new(
                            docstring.location.row()
                                + context.original_index
                                + 1
                                + blank_lines_after_header,
-                            1,
+                            0,
                        ),
                    ));
                }
@@ -1040,7 +1033,7 @@ fn blanks_and_section_underline(
                                + context.original_index
                                + 1
                                + blank_lines_after_header,
-                            1,
+                            0,
                        ),
                        Location::new(
                            docstring.location.row()
@@ -1048,7 +1041,7 @@ fn blanks_and_section_underline(
                                + 1
                                + blank_lines_after_header
                                + 1,
-                            1,
+                            0,
                        ),
                    ));
                };
@@ -1073,7 +1066,7 @@ fn blanks_and_section_underline(
                                + context.original_index
                                + 1
                                + blank_lines_after_header,
-                            1,
+                            0,
                        ),
                        Location::new(
                            docstring.location.row()
@@ -1121,7 +1114,7 @@ fn blanks_and_section_underline(
                                        + context.original_index
                                        + 1
                                        + line_after_dashes_index,
-                                    1,
+                                    0,
                                ),
                                Location::new(
                                    docstring.location.row()
@@ -1129,7 +1122,7 @@ fn blanks_and_section_underline(
                                        + 1
                                        + line_after_dashes_index
                                        + blank_lines_after_dashes,
-                                    1,
+                                    0,
                                ),
                            ));
                        }
@@ -1183,11 +1176,11 @@ fn common_section(
                            capitalized_section_name,
                            Location::new(
                                docstring.location.row() + context.original_index,
-                                1 + section_name_start,
+                                *section_name_start,
                            ),
                            Location::new(
                                docstring.location.row() + context.original_index,
-                                1 + section_name_start + section_name_length,
+                                section_name_start + section_name_length,
                            ),
                        ))
                    }
@@ -1209,10 +1202,10 @@ fn common_section(
                // Replace the existing indentation with whitespace of the appropriate length.
                check.amend(Fix::replacement(
                    helpers::clean(&indentation),
-                    Location::new(docstring.location.row() + context.original_index, 1),
+                    Location::new(docstring.location.row() + context.original_index, 0),
                    Location::new(
                        docstring.location.row() + context.original_index,
-                        1 + leading_space.len(),
+                        leading_space.len(),
                    ),
                ));
            };
@@ -1241,7 +1234,7 @@ fn common_section(
                                + context.original_index
                                + 1
                                + context.following_lines.len(),
-                            1,
+                            0,
                        ),
                    ));
                }
@@ -1262,7 +1255,7 @@ fn common_section(
                                + context.original_index
                                + 1
                                + context.following_lines.len(),
-                            1,
+                            0,
                        ),
                    ));
                }
@@ -1281,7 +1274,7 @@ fn common_section(
                // Add a blank line before the section.
                check.amend(Fix::insertion(
                    "\n".to_string(),
-                    Location::new(docstring.location.row() + context.original_index, 1),
+                    Location::new(docstring.location.row() + context.original_index, 0),
                ));
            }
            checker.add_check(check)
@@ -1448,11 +1441,11 @@ fn numpy_section(checker: &mut Checker, definition: &Definition, context: &Secti
                    check.amend(Fix::deletion(
                        Location::new(
                            docstring.location.row() + context.original_index,
-                            1 + suffix_start,
+                            *suffix_start,
                        ),
                        Location::new(
                            docstring.location.row() + context.original_index,
-                            1 + suffix_start + suffix_length,
+                            suffix_start + suffix_length,
                        ),
                    ));
                }
@@ -1498,11 +1491,11 @@ fn google_section(checker: &mut Checker, definition: &Definition, context: &Sect
                        ":".to_string(),
                        Location::new(
                            docstring.location.row() + context.original_index,
-                            1 + suffix_start,
+                            *suffix_start,
                        ),
                        Location::new(
                            docstring.location.row() + context.original_index,
-                            1 + suffix_start + suffix_length,
+                            suffix_start + suffix_length,
                        ),
                    ));
                }
--- a/src/pyflakes/fixes.rs
+++ b/src/pyflakes/fixes.rs
@@ -2,10 +2,10 @@ use anyhow::Result;
 use libcst_native::{Codegen, ImportNames, NameOrAttribute, SmallStatement, Statement};
 use rustpython_ast::Stmt;

-use crate::ast::operations::SourceCodeLocator;
 use crate::ast::types::Range;
 use crate::autofix::{helpers, Fix};
 use crate::cst::helpers::compose_module_path;
+use crate::source_code_locator::SourceCodeLocator;

 /// Generate a Fix to remove any unused imports from an `import` statement.
 pub fn remove_unused_imports(
--- a/src/pyupgrade/fixes.rs
+++ b/src/pyupgrade/fixes.rs
@@ -4,9 +4,9 @@ use rustpython_parser::lexer;
 use rustpython_parser::lexer::Tok;

 use crate::ast::helpers;
-use crate::ast::operations::SourceCodeLocator;
 use crate::ast::types::Range;
 use crate::autofix::Fix;
+use crate::source_code_locator::SourceCodeLocator;

 /// Generate a fix to remove a base from a ClassDef statement.
 pub fn remove_class_def_base(
--- a/src/pyupgrade/plugins/super_call_with_parameters.rs
+++ b/src/pyupgrade/plugins/super_call_with_parameters.rs
@@ -17,9 +17,7 @@ pub fn super_call_with_parameters(checker: &mut Checker, expr: &Expr, func: &Exp
            .collect();
        if let Some(mut check) = checks::super_args(scope, &parents, expr, func, args) {
            if checker.patch() {
-                if let Some(fix) =
-                    pyupgrade::fixes::remove_super_arguments(checker.get_locator(), expr)
-                {
+                if let Some(fix) = pyupgrade::fixes::remove_super_arguments(checker.locator, expr) {
                    check.amend(fix);
                }
            }
--- a/src/pyupgrade/plugins/useless_object_inheritance.rs
+++ b/src/pyupgrade/plugins/useless_object_inheritance.rs
@@ -15,7 +15,7 @@ pub fn useless_object_inheritance(
    if let Some(mut check) = checks::useless_object_inheritance(name, bases, scope) {
        if checker.patch() {
            if let Some(fix) = pyupgrade::fixes::remove_class_def_base(
-                checker.get_locator(),
+                checker.locator,
                &stmt.location,
                check.location,
                bases,
--- a/src/settings/configuration.rs
+++ b/src/settings/configuration.rs
@@ -8,9 +8,9 @@ use once_cell::sync::Lazy;
 use regex::Regex;

 use crate::checks_gen::CheckCodePrefix;
-use crate::flake8_quotes;
 use crate::settings::pyproject::load_options;
 use crate::settings::types::{FilePattern, PerFileIgnore, PythonVersion};
+use crate::{flake8_quotes, pep8_naming};

 #[derive(Debug)]
 pub struct Configuration {
@@ -26,6 +26,7 @@ pub struct Configuration {
    pub target_version: PythonVersion,
    // Plugins
    pub flake8_quotes: flake8_quotes::settings::Settings,
+    pub pep8_naming: pep8_naming::settings::Settings,
 }

 static DEFAULT_EXCLUDE: Lazy<Vec<FilePattern>> = Lazy::new(|| {
@@ -59,9 +60,8 @@ impl Configuration {
    pub fn from_pyproject(
        pyproject: &Option<PathBuf>,
        project_root: &Option<PathBuf>,
-        quiet: bool,
    ) -> Result<Self> {
-        let options = load_options(pyproject, quiet)?;
+        let options = load_options(pyproject)?;
        Ok(Configuration {
            dummy_variable_rgx: match options.dummy_variable_rgx {
                Some(pattern) => Regex::new(&pattern)
@@ -98,7 +98,11 @@ impl Configuration {
            // Plugins
            flake8_quotes: options
                .flake8_quotes
-                .map(flake8_quotes::settings::Settings::from_config)
+                .map(flake8_quotes::settings::Settings::from_options)
+                .unwrap_or_default(),
+            pep8_naming: options
+                .pep8_naming
+                .map(pep8_naming::settings::Settings::from_options)
                .unwrap_or_default(),
        })
    }
--- a/src/settings/mod.rs
+++ b/src/settings/mod.rs
@@ -8,9 +8,9 @@ use regex::Regex;

 use crate::checks::CheckCode;
 use crate::checks_gen::{CheckCodePrefix, PrefixSpecificity};
-use crate::flake8_quotes;
 use crate::settings::configuration::Configuration;
 use crate::settings::types::{FilePattern, PerFileIgnore, PythonVersion};
+use crate::{flake8_quotes, pep8_naming};

 pub mod configuration;
 pub mod options;
@@ -29,6 +29,7 @@ pub struct Settings {
    pub target_version: PythonVersion,
    // Plugins
    pub flake8_quotes: flake8_quotes::settings::Settings,
+    pub pep8_naming: pep8_naming::settings::Settings,
 }

 impl Settings {
@@ -45,6 +46,7 @@ impl Settings {
            extend_exclude: config.extend_exclude,
            flake8_quotes: config.flake8_quotes,
            line_length: config.line_length,
+            pep8_naming: config.pep8_naming,
            per_file_ignores: config.per_file_ignores,
            target_version: config.target_version,
        }
@@ -60,6 +62,7 @@ impl Settings {
            per_file_ignores: vec![],
            target_version: PythonVersion::Py310,
            flake8_quotes: Default::default(),
+            pep8_naming: Default::default(),
        }
    }

@@ -73,6 +76,7 @@ impl Settings {
            per_file_ignores: vec![],
            target_version: PythonVersion::Py310,
            flake8_quotes: Default::default(),
+            pep8_naming: Default::default(),
        }
    }
 }
--- a/src/settings/options.rs
+++ b/src/settings/options.rs
@@ -3,8 +3,8 @@
 use serde::Deserialize;

 use crate::checks_gen::CheckCodePrefix;
-use crate::flake8_quotes;
 use crate::settings::types::{PythonVersion, StrCheckCodePair};
+use crate::{flake8_quotes, pep8_naming};

 #[derive(Debug, PartialEq, Eq, Deserialize, Default)]
 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
@@ -24,5 +24,7 @@ pub struct Options {
    pub per_file_ignores: Vec<StrCheckCodePair>,
    pub dummy_variable_rgx: Option<String>,
    pub target_version: Option<PythonVersion>,
+    // Plugins
    pub flake8_quotes: Option<flake8_quotes::settings::Options>,
+    pub pep8_naming: Option<pep8_naming::settings::Options>,
 }
--- a/src/settings/pyproject.rs
+++ b/src/settings/pyproject.rs
@@ -4,6 +4,7 @@ use std::path::{Path, PathBuf};

 use anyhow::Result;
 use common_path::common_path_all;
+use log::debug;
 use path_absolutize::Absolutize;
 use serde::Deserialize;

@@ -69,17 +70,15 @@ pub fn find_project_root(sources: &[PathBuf]) -> Option<PathBuf> {
    None
 }

-pub fn load_options(pyproject: &Option<PathBuf>, quiet: bool) -> Result<Options> {
+pub fn load_options(pyproject: &Option<PathBuf>) -> Result<Options> {
    match pyproject {
        Some(pyproject) => Ok(parse_pyproject_toml(pyproject)?
            .tool
            .and_then(|tool| tool.ruff)
            .unwrap_or_default()),
        None => {
-            if !quiet {
-                eprintln!("No pyproject.toml found.");
-                eprintln!("Falling back to default configuration...");
-            }
+            debug!("No pyproject.toml found.");
+            debug!("Falling back to default configuration...");
            Ok(Default::default())
        }
    }
@@ -94,12 +93,12 @@ mod tests {
    use anyhow::Result;

    use crate::checks_gen::CheckCodePrefix;
-    use crate::flake8_quotes;
    use crate::flake8_quotes::settings::Quote;
    use crate::settings::pyproject::{
        find_project_root, find_pyproject_toml, parse_pyproject_toml, Options, Pyproject, Tools,
    };
    use crate::settings::types::StrCheckCodePair;
+    use crate::{flake8_quotes, pep8_naming};

    #[test]
    fn deserialize() -> Result<()> {
@@ -133,7 +132,8 @@ mod tests {
                    per_file_ignores: vec![],
                    dummy_variable_rgx: None,
                    target_version: None,
-                    flake8_quotes: None
+                    flake8_quotes: None,
+                    pep8_naming: None,
                })
            })
        );
@@ -159,7 +159,8 @@ line-length = 79
                    per_file_ignores: vec![],
                    dummy_variable_rgx: None,
                    target_version: None,
-                    flake8_quotes: None
+                    flake8_quotes: None,
+                    pep8_naming: None,
                })
            })
        );
@@ -185,7 +186,8 @@ exclude = ["foo.py"]
                    per_file_ignores: vec![],
                    dummy_variable_rgx: None,
                    target_version: None,
-                    flake8_quotes: None
+                    flake8_quotes: None,
+                    pep8_naming: None,
                })
            })
        );
@@ -211,7 +213,8 @@ select = ["E501"]
                    per_file_ignores: vec![],
                    dummy_variable_rgx: None,
                    target_version: None,
-                    flake8_quotes: None
+                    flake8_quotes: None,
+                    pep8_naming: None,
                })
            })
        );
@@ -238,7 +241,8 @@ ignore = ["E501"]
                    per_file_ignores: vec![],
                    dummy_variable_rgx: None,
                    target_version: None,
-                    flake8_quotes: None
+                    flake8_quotes: None,
+                    pep8_naming: None,
                })
            })
        );
@@ -316,7 +320,25 @@ other-attribute = 1
                    multiline_quotes: Some(Quote::Double),
                    docstring_quotes: Some(Quote::Double),
                    avoid_escape: Some(true),
-                })
+                }),
+                pep8_naming: Some(pep8_naming::settings::Options {
+                    ignore_names: Some(vec![
+                        "setUp".to_string(),
+                        "tearDown".to_string(),
+                        "setUpClass".to_string(),
+                        "tearDownClass".to_string(),
+                        "setUpModule".to_string(),
+                        "tearDownModule".to_string(),
+                        "asyncSetUp".to_string(),
+                        "asyncTearDown".to_string(),
+                        "setUpTestData".to_string(),
+                        "failureException".to_string(),
+                        "longMessage".to_string(),
+                        "maxDiff".to_string(),
+                    ]),
+                    classmethod_decorators: Some(vec!["classmethod".to_string()]),
+                    staticmethod_decorators: Some(vec!["staticmethod".to_string()]),
+                }),
            }
        );

--- a/src/settings/user.rs
+++ b/src/settings/user.rs
@@ -6,7 +6,7 @@ use regex::Regex;

 use crate::checks_gen::CheckCodePrefix;
 use crate::settings::types::{FilePattern, PerFileIgnore, PythonVersion};
-use crate::{flake8_quotes, Configuration};
+use crate::{flake8_quotes, pep8_naming, Configuration};

 /// Struct to render user-facing exclusion patterns.
 #[derive(Debug)]
@@ -46,6 +46,7 @@ pub struct UserConfiguration {
    pub target_version: PythonVersion,
    // Plugins
    pub flake8_quotes: flake8_quotes::settings::Settings,
+    pub pep8_naming: pep8_naming::settings::Settings,
    // Non-settings exposed to the user
    pub project_root: Option<PathBuf>,
    pub pyproject: Option<PathBuf>,
@@ -53,30 +54,31 @@ pub struct UserConfiguration {

 impl UserConfiguration {
    pub fn from_configuration(
-        settings: Configuration,
+        configuration: Configuration,
        project_root: Option<PathBuf>,
        pyproject: Option<PathBuf>,
    ) -> Self {
        Self {
-            dummy_variable_rgx: settings.dummy_variable_rgx,
-            exclude: settings
+            dummy_variable_rgx: configuration.dummy_variable_rgx,
+            exclude: configuration
                .exclude
                .into_iter()
                .map(Exclusion::from_file_pattern)
                .collect(),
-            extend_exclude: settings
+            extend_exclude: configuration
                .extend_exclude
                .into_iter()
                .map(Exclusion::from_file_pattern)
                .collect(),
-            extend_ignore: settings.extend_ignore,
-            extend_select: settings.extend_select,
-            ignore: settings.ignore,
-            line_length: settings.line_length,
-            per_file_ignores: settings.per_file_ignores,
-            select: settings.select,
-            target_version: settings.target_version,
-            flake8_quotes: settings.flake8_quotes,
+            extend_ignore: configuration.extend_ignore,
+            extend_select: configuration.extend_select,
+            ignore: configuration.ignore,
+            line_length: configuration.line_length,
+            per_file_ignores: configuration.per_file_ignores,
+            select: configuration.select,
+            target_version: configuration.target_version,
+            flake8_quotes: configuration.flake8_quotes,
+            pep8_naming: configuration.pep8_naming,
            project_root,
            pyproject,
        }
--- a/src/snapshots/rufflintertests__A001_A001.py.snap
+++ b/src/snapshots/rufflintertests__A001_A001.py.snap
@@ -6,162 +6,162 @@ expression: checks
    BuiltinVariableShadowing: sum
  location:
    row: 1
-    column: 1
+    column: 0
  end_location:
    row: 1
-    column: 19
+    column: 18
  fix: ~
 - kind:
    BuiltinVariableShadowing: int
  location:
    row: 2
-    column: 1
+    column: 0
  end_location:
    row: 2
-    column: 30
+    column: 29
  fix: ~
 - kind:
    BuiltinVariableShadowing: print
  location:
    row: 4
-    column: 1
+    column: 0
  end_location:
    row: 4
-    column: 6
+    column: 5
  fix: ~
 - kind:
    BuiltinVariableShadowing: copyright
  location:
    row: 5
-    column: 1
+    column: 0
  end_location:
    row: 5
-    column: 10
+    column: 9
  fix: ~
 - kind:
    BuiltinVariableShadowing: complex
  location:
    row: 6
-    column: 2
+    column: 1
  end_location:
    row: 6
-    column: 14
+    column: 13
  fix: ~
 - kind:
    BuiltinVariableShadowing: float
  location:
    row: 7
-    column: 1
+    column: 0
  end_location:
    row: 7
-    column: 6
+    column: 5
  fix: ~
 - kind:
    BuiltinVariableShadowing: object
  location:
    row: 7
-    column: 9
+    column: 8
  end_location:
    row: 7
-    column: 15
+    column: 14
  fix: ~
 - kind:
    BuiltinVariableShadowing: min
  location:
    row: 8
-    column: 1
+    column: 0
  end_location:
    row: 8
-    column: 4
+    column: 3
  fix: ~
 - kind:
    BuiltinVariableShadowing: max
  location:
    row: 8
-    column: 6
+    column: 5
  end_location:
    row: 8
-    column: 9
+    column: 8
  fix: ~
 - kind:
    BuiltinVariableShadowing: bytes
  location:
    row: 10
-    column: 1
+    column: 0
  end_location:
    row: 13
-    column: 1
+    column: 0
  fix: ~
 - kind:
    BuiltinVariableShadowing: slice
  location:
    row: 13
-    column: 1
+    column: 0
  end_location:
    row: 16
-    column: 1
+    column: 0
  fix: ~
 - kind:
    BuiltinVariableShadowing: ValueError
  location:
    row: 18
-    column: 1
+    column: 0
  end_location:
    row: 21
-    column: 1
+    column: 0
  fix: ~
 - kind:
    BuiltinVariableShadowing: memoryview
  location:
    row: 21
-    column: 5
+    column: 4
  end_location:
    row: 21
-    column: 15
+    column: 14
  fix: ~
 - kind:
    BuiltinVariableShadowing: bytearray
  location:
    row: 21
-    column: 18
+    column: 17
  end_location:
    row: 21
-    column: 27
+    column: 26
  fix: ~
 - kind:
    BuiltinVariableShadowing: str
  location:
    row: 24
-    column: 22
+    column: 21
  end_location:
    row: 24
-    column: 25
+    column: 24
  fix: ~
 - kind:
    BuiltinVariableShadowing: all
  location:
    row: 24
-    column: 45
+    column: 44
  end_location:
    row: 24
-    column: 48
+    column: 47
  fix: ~
 - kind:
    BuiltinVariableShadowing: any
  location:
    row: 24
-    column: 50
+    column: 49
  end_location:
    row: 24
-    column: 53
+    column: 52
  fix: ~
 - kind:
    BuiltinVariableShadowing: sum
  location:
    row: 27
-    column: 8
+    column: 7
  end_location:
    row: 27
-    column: 11
+    column: 10
  fix: ~

--- a/src/snapshots/rufflintertests__A002_A002.py.snap
+++ b/src/snapshots/rufflintertests__A002_A002.py.snap
@@ -6,63 +6,63 @@ expression: checks
    BuiltinArgumentShadowing: str
  location:
    row: 1
-    column: 11
+    column: 10
  end_location:
    row: 1
-    column: 14
+    column: 13
  fix: ~
 - kind:
    BuiltinArgumentShadowing: type
  location:
    row: 1
-    column: 19
+    column: 18
  end_location:
    row: 1
-    column: 23
+    column: 22
  fix: ~
 - kind:
    BuiltinArgumentShadowing: complex
  location:
    row: 1
-    column: 26
+    column: 25
  end_location:
    row: 1
-    column: 33
+    column: 32
  fix: ~
 - kind:
    BuiltinArgumentShadowing: Exception
  location:
    row: 1
-    column: 35
+    column: 34
  end_location:
    row: 1
-    column: 44
+    column: 43
  fix: ~
 - kind:
    BuiltinArgumentShadowing: getattr
  location:
    row: 1
-    column: 48
+    column: 47
  end_location:
    row: 1
-    column: 55
+    column: 54
  fix: ~
 - kind:
    BuiltinArgumentShadowing: bytes
  location:
    row: 5
-    column: 17
+    column: 16
  end_location:
    row: 5
-    column: 22
+    column: 21
  fix: ~
 - kind:
    BuiltinArgumentShadowing: float
  location:
    row: 9
-    column: 16
+    column: 15
  end_location:
    row: 9
-    column: 21
+    column: 20
  fix: ~

--- a/src/snapshots/rufflintertests__A003_A003.py.snap
+++ b/src/snapshots/rufflintertests__A003_A003.py.snap
@@ -6,18 +6,18 @@ expression: checks
    BuiltinAttributeShadowing: ImportError
  location:
    row: 2
-    column: 5
+    column: 4
  end_location:
    row: 2
-    column: 16
+    column: 15
  fix: ~
 - kind:
    BuiltinAttributeShadowing: str
  location:
    row: 7
-    column: 5
+    column: 4
  end_location:
    row: 9
-    column: 1
+    column: 0
  fix: ~

--- a/src/snapshots/rufflintertests__B002_B002.py.snap
+++ b/src/snapshots/rufflintertests__B002_B002.py.snap
@@ -5,17 +5,17 @@ expression: checks
 - kind: UnaryPrefixIncrement
  location:
    row: 15
-    column: 9
+    column: 8
  end_location:
    row: 15
-    column: 12
+    column: 11
  fix: ~
 - kind: UnaryPrefixIncrement
  location:
    row: 20
-    column: 12
+    column: 11
  end_location:
    row: 20
-    column: 15
+    column: 14
  fix: ~

--- a/src/snapshots/rufflintertests__B006_B006_B008.py.snap
+++ b/src/snapshots/rufflintertests__B006_B006_B008.py.snap
@@ -0,0 +1,93 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind: MutableArgumentDefault
+  location:
+    row: 60
+    column: 24
+  end_location:
+    row: 60
+    column: 33
+  fix: ~
+- kind: MutableArgumentDefault
+  location:
+    row: 64
+    column: 29
+  end_location:
+    row: 64
+    column: 31
+  fix: ~
+- kind: MutableArgumentDefault
+  location:
+    row: 68
+    column: 19
+  end_location:
+    row: 68
+    column: 24
+  fix: ~
+- kind: MutableArgumentDefault
+  location:
+    row: 72
+    column: 19
+  end_location:
+    row: 72
+    column: 44
+  fix: ~
+- kind: MutableArgumentDefault
+  location:
+    row: 76
+    column: 31
+  end_location:
+    row: 76
+    column: 56
+  fix: ~
+- kind: MutableArgumentDefault
+  location:
+    row: 80
+    column: 25
+  end_location:
+    row: 80
+    column: 44
+  fix: ~
+- kind: MutableArgumentDefault
+  location:
+    row: 85
+    column: 45
+  end_location:
+    row: 85
+    column: 69
+  fix: ~
+- kind: MutableArgumentDefault
+  location:
+    row: 89
+    column: 45
+  end_location:
+    row: 89
+    column: 72
+  fix: ~
+- kind: MutableArgumentDefault
+  location:
+    row: 93
+    column: 44
+  end_location:
+    row: 93
+    column: 68
+  fix: ~
+- kind: MutableArgumentDefault
+  location:
+    row: 97
+    column: 32
+  end_location:
+    row: 97
+    column: 34
+  fix: ~
+- kind: MutableArgumentDefault
+  location:
+    row: 170
+    column: 19
+  end_location:
+    row: 170
+    column: 48
+  fix: ~
+
--- a/src/snapshots/rufflintertests__B007_B007.py.snap
+++ b/src/snapshots/rufflintertests__B007_B007.py.snap
@@ -6,72 +6,72 @@ expression: checks
    UnusedLoopControlVariable: i
  location:
    row: 6
-    column: 5
+    column: 4
  end_location:
    row: 6
-    column: 6
+    column: 5
  fix:
    patch:
      content: _i
      location:
        row: 6
-        column: 5
+        column: 4
      end_location:
        row: 6
-        column: 6
+        column: 5
    applied: false
 - kind:
    UnusedLoopControlVariable: k
  location:
    row: 18
-    column: 13
+    column: 12
  end_location:
    row: 18
-    column: 14
+    column: 13
  fix:
    patch:
      content: _k
      location:
        row: 18
-        column: 13
+        column: 12
      end_location:
        row: 18
-        column: 14
+        column: 13
    applied: false
 - kind:
    UnusedLoopControlVariable: i
  location:
    row: 30
-    column: 5
+    column: 4
  end_location:
    row: 30
-    column: 6
+    column: 5
  fix:
    patch:
      content: _i
      location:
        row: 30
-        column: 5
+        column: 4
      end_location:
        row: 30
-        column: 6
+        column: 5
    applied: false
 - kind:
    UnusedLoopControlVariable: k
  location:
    row: 30
-    column: 13
+    column: 12
  end_location:
    row: 30
-    column: 14
+    column: 13
  fix:
    patch:
      content: _k
      location:
        row: 30
-        column: 13
+        column: 12
      end_location:
        row: 30
-        column: 14
+        column: 13
    applied: false

--- a/src/snapshots/rufflintertests__B011_B011.py.snap
+++ b/src/snapshots/rufflintertests__B011_B011.py.snap
@@ -5,35 +5,35 @@ expression: checks
 - kind: DoNotAssertFalse
  location:
    row: 8
-    column: 8
+    column: 7
  end_location:
    row: 8
-    column: 13
+    column: 12
  fix:
    patch:
      content: raise AssertionError()
      location:
        row: 8
-        column: 1
+        column: 0
      end_location:
        row: 8
-        column: 13
+        column: 12
    applied: false
 - kind: DoNotAssertFalse
  location:
    row: 10
-    column: 8
+    column: 7
  end_location:
    row: 10
-    column: 13
+    column: 12
  fix:
    patch:
      content: "raise AssertionError('message')"
      location:
        row: 10
-        column: 1
+        column: 0
      end_location:
        row: 10
-        column: 24
+        column: 23
    applied: false

--- a/src/snapshots/rufflintertests__B013_B013.py.snap
+++ b/src/snapshots/rufflintertests__B013_B013.py.snap
@@ -0,0 +1,14 @@
+---
+source: src/linter.rs
+expression: checks
+---
+- kind:
+    RedundantTupleInExceptionHandler: ValueError
+  location:
+    row: 3
+    column: 8
+  end_location:
+    row: 3
+    column: 19
+  fix: ~
+
--- a/src/snapshots/rufflintertests__B014_B014.py.snap
+++ b/src/snapshots/rufflintertests__B014_B014.py.snap
@@ -7,56 +7,56 @@ expression: checks
      - OSError
  location:
    row: 17
-    column: 9
+    column: 8
  end_location:
    row: 17
-    column: 25
+    column: 24
  fix:
    patch:
      content: "OSError,"
      location:
        row: 17
-        column: 9
+        column: 8
      end_location:
        row: 17
-        column: 25
+        column: 24
    applied: false
 - kind:
    DuplicateHandlerException:
      - MyError
  location:
    row: 28
-    column: 9
+    column: 8
  end_location:
    row: 28
-    column: 25
+    column: 24
  fix:
    patch:
      content: "MyError,"
      location:
        row: 28
-        column: 9
+        column: 8
      end_location:
        row: 28
-        column: 25
+        column: 24
    applied: false
 - kind:
    DuplicateHandlerException:
      - re.error
  location:
    row: 49
-    column: 9
+    column: 8
  end_location:
    row: 49
-    column: 27
+    column: 26
  fix:
    patch:
      content: "re.error,"
      location:
        row: 49
-        column: 9
+        column: 8
      end_location:
        row: 49
-        column: 27
+        column: 26
    applied: false

--- a/src/snapshots/rufflintertests__B017_B017.py.snap
+++ b/src/snapshots/rufflintertests__B017_B017.py.snap
@@ -5,9 +5,9 @@ expression: checks
 - kind: NoAssertRaisesException
  location:
    row: 22
-    column: 9
+    column: 8
  end_location:
    row: 25
-    column: 5
+    column: 4
  fix: ~

--- a/src/snapshots/rufflintertests__B025_B025.py.snap
+++ b/src/snapshots/rufflintertests__B025_B025.py.snap
@@ -6,36 +6,36 @@ expression: checks
    DuplicateTryBlockException: ValueError
  location:
    row: 15
-    column: 1
+    column: 0
  end_location:
    row: 22
-    column: 1
+    column: 0
  fix: ~
 - kind:
    DuplicateTryBlockException: pickle.PickleError
  location:
    row: 22
-    column: 1
+    column: 0
  end_location:
    row: 31
-    column: 1
+    column: 0
  fix: ~
 - kind:
    DuplicateTryBlockException: TypeError
  location:
    row: 31
-    column: 1
+    column: 0
  end_location:
    row: 39
-    column: 1
+    column: 0
  fix: ~
 - kind:
    DuplicateTryBlockException: ValueError
  location:
    row: 31
-    column: 1
+    column: 0
  end_location:
    row: 39
-    column: 1
+    column: 0
  fix: ~

--- a/src/snapshots/rufflintertests__C400_C400.py.snap
+++ b/src/snapshots/rufflintertests__C400_C400.py.snap
@@ -5,9 +5,9 @@ expression: checks
 - kind: UnnecessaryGeneratorList
  location:
    row: 1
-    column: 5
+    column: 4
  end_location:
    row: 1
-    column: 30
+    column: 29
  fix: ~

--- a/src/snapshots/rufflintertests__C401_C401.py.snap
+++ b/src/snapshots/rufflintertests__C401_C401.py.snap
@@ -5,9 +5,9 @@ expression: checks
 - kind: UnnecessaryGeneratorSet
  location:
    row: 1
-    column: 5
+    column: 4
  end_location:
    row: 1
-    column: 29
+    column: 28
  fix: ~

--- a/src/snapshots/rufflintertests__C402_C402.py.snap
+++ b/src/snapshots/rufflintertests__C402_C402.py.snap
@@ -5,9 +5,9 @@ expression: checks
 - kind: UnnecessaryGeneratorDict
  location:
    row: 1
-    column: 5
+    column: 0
  end_location:
    row: 1
-    column: 35
+    column: 30
  fix: ~

--- a/src/snapshots/rufflintertests__C403_C403.py.snap
+++ b/src/snapshots/rufflintertests__C403_C403.py.snap
@@ -5,9 +5,9 @@ expression: checks
 - kind: UnnecessaryListComprehensionSet
  location:
    row: 1
-    column: 5
+    column: 4
  end_location:
    row: 1
-    column: 31
+    column: 30
  fix: ~

--- a/src/snapshots/rufflintertests__C404_C404.py.snap
+++ b/src/snapshots/rufflintertests__C404_C404.py.snap
@@ -5,9 +5,9 @@ expression: checks
 - kind: UnnecessaryListComprehensionDict
  location:
    row: 1
-    column: 5
+    column: 0
  end_location:
    row: 1
-    column: 37
+    column: 32
  fix: ~

--- a/src/snapshots/rufflintertests__C405_C405.py.snap
+++ b/src/snapshots/rufflintertests__C405_C405.py.snap
@@ -6,36 +6,36 @@ expression: checks
    UnnecessaryLiteralSet: list
  location:
    row: 1
-    column: 6
+    column: 5
  end_location:
    row: 1
-    column: 17
+    column: 16
  fix: ~
 - kind:
    UnnecessaryLiteralSet: tuple
  location:
    row: 2
-    column: 6
+    column: 5
  end_location:
    row: 2
-    column: 17
+    column: 16
  fix: ~
 - kind:
    UnnecessaryLiteralSet: list
  location:
    row: 3
-    column: 6
+    column: 5
  end_location:
    row: 3
-    column: 13
+    column: 12
  fix: ~
 - kind:
    UnnecessaryLiteralSet: tuple
  location:
    row: 4
-    column: 6
+    column: 5
  end_location:
    row: 4
-    column: 13
+    column: 12
  fix: ~

--- a/src/snapshots/rufflintertests__C406_C406.py.snap
+++ b/src/snapshots/rufflintertests__C406_C406.py.snap
@@ -6,36 +6,36 @@ expression: checks
    UnnecessaryLiteralDict: list
  location:
    row: 1
-    column: 6
+    column: 5
  end_location:
    row: 1
-    column: 20
+    column: 19
  fix: ~
 - kind:
    UnnecessaryLiteralDict: tuple
  location:
    row: 2
-    column: 6
+    column: 5
  end_location:
    row: 2
-    column: 21
+    column: 20
  fix: ~
 - kind:
    UnnecessaryLiteralDict: list
  location:
    row: 3
-    column: 6
+    column: 5
  end_location:
    row: 3
-    column: 14
+    column: 13
  fix: ~
 - kind:
    UnnecessaryLiteralDict: tuple
  location:
    row: 4
-    column: 6
+    column: 5
  end_location:
    row: 4
-    column: 14
+    column: 13
  fix: ~

--- a/src/snapshots/rufflintertests__C408_C408.py.snap
+++ b/src/snapshots/rufflintertests__C408_C408.py.snap
@@ -6,36 +6,36 @@ expression: checks
    UnnecessaryCollectionCall: tuple
  location:
    row: 1
-    column: 5
+    column: 4
  end_location:
    row: 1
-    column: 12
+    column: 11
  fix: ~
 - kind:
    UnnecessaryCollectionCall: list
  location:
    row: 2
-    column: 5
+    column: 4
  end_location:
    row: 2
+    column: 10
+  fix: ~
+- kind:
+    UnnecessaryCollectionCall: dict
+  location:
+    row: 3
+    column: 5
+  end_location:
+    row: 3
    column: 11
  fix: ~
- kind:
-    UnnecessaryCollectionCall: dict
-  location:
-    row: 3
-    column: 6
-  end_location:
-    row: 3
-    column: 12
-  fix: ~
 - kind:
    UnnecessaryCollectionCall: dict
  location:
    row: 4
-    column: 6
+    column: 5
  end_location:
    row: 4
-    column: 15
+    column: 14
  fix: ~

--- a/src/snapshots/rufflintertests__C409_C409.py.snap
+++ b/src/snapshots/rufflintertests__C409_C409.py.snap
@@ -6,27 +6,27 @@ expression: checks
    UnnecessaryLiteralWithinTupleCall: list
  location:
    row: 1
-    column: 6
+    column: 5
  end_location:
    row: 1
-    column: 19
+    column: 18
  fix: ~
 - kind:
    UnnecessaryLiteralWithinTupleCall: tuple
  location:
    row: 2
-    column: 6
+    column: 5
  end_location:
    row: 2
-    column: 19
+    column: 18
  fix: ~
 - kind:
    UnnecessaryLiteralWithinTupleCall: list
  location:
    row: 3
-    column: 6
+    column: 5
  end_location:
    row: 3
-    column: 15
+    column: 14
  fix: ~

--- a/src/snapshots/rufflintertests__C410_C410.py.snap
+++ b/src/snapshots/rufflintertests__C410_C410.py.snap
@@ -6,36 +6,36 @@ expression: checks
    UnnecessaryLiteralWithinListCall: list
  location:
    row: 1
-    column: 6
+    column: 5
  end_location:
    row: 1
-    column: 18
+    column: 17
  fix: ~
 - kind:
    UnnecessaryLiteralWithinListCall: tuple
  location:
    row: 2
-    column: 6
+    column: 5
  end_location:
    row: 2
-    column: 18
+    column: 17
  fix: ~
 - kind:
    UnnecessaryLiteralWithinListCall: list
  location:
    row: 3
-    column: 6
+    column: 5
  end_location:
    row: 3
-    column: 14
+    column: 13
  fix: ~
 - kind:
    UnnecessaryLiteralWithinListCall: tuple
  location:
    row: 4
-    column: 6
+    column: 5
  end_location:
    row: 4
-    column: 14
+    column: 13
  fix: ~

--- a/src/snapshots/rufflintertests__C411_C411.py.snap
+++ b/src/snapshots/rufflintertests__C411_C411.py.snap
@@ -5,9 +5,9 @@ expression: checks
 - kind: UnnecessaryListCall
  location:
    row: 2
-    column: 1
+    column: 0
  end_location:
    row: 2
-    column: 21
+    column: 20
  fix: ~

--- a/src/snapshots/rufflintertests__C413_C413.py.snap
+++ b/src/snapshots/rufflintertests__C413_C413.py.snap
@@ -6,27 +6,27 @@ expression: checks
    UnnecessaryCallAroundSorted: list
  location:
    row: 2
-    column: 1
+    column: 0
  end_location:
    row: 2
-    column: 16
+    column: 15
  fix: ~
 - kind:
    UnnecessaryCallAroundSorted: reversed
  location:
    row: 3
-    column: 1
+    column: 0
  end_location:
    row: 3
-    column: 20
+    column: 19
  fix: ~
 - kind:
    UnnecessaryCallAroundSorted: reversed
  location:
    row: 4
-    column: 1
+    column: 0
  end_location:
    row: 4
-    column: 34
+    column: 33
  fix: ~

--- a/src/snapshots/rufflintertests__C414_C414.py.snap
+++ b/src/snapshots/rufflintertests__C414_C414.py.snap
@@ -8,76 +8,76 @@ expression: checks
      - list
  location:
    row: 2
-    column: 1
+    column: 0
  end_location:
    row: 2
-    column: 14
-  fix: ~
- kind:
-    UnnecessaryDoubleCastOrProcess:
-      - tuple
-      - list
-  location:
-    row: 3
-    column: 1
-  end_location:
-    row: 3
-    column: 15
-  fix: ~
- kind:
-    UnnecessaryDoubleCastOrProcess:
-      - list
-      - tuple
-  location:
-    row: 4
-    column: 1
-  end_location:
-    row: 4
-    column: 15
-  fix: ~
- kind:
-    UnnecessaryDoubleCastOrProcess:
-      - tuple
-      - tuple
-  location:
-    row: 5
-    column: 1
-  end_location:
-    row: 5
-    column: 16
-  fix: ~
- kind:
-    UnnecessaryDoubleCastOrProcess:
-      - set
-      - set
-  location:
-    row: 6
-    column: 1
-  end_location:
-    row: 6
-    column: 12
-  fix: ~
- kind:
-    UnnecessaryDoubleCastOrProcess:
-      - list
-      - set
-  location:
-    row: 7
-    column: 1
-  end_location:
-    row: 7
    column: 13
  fix: ~
+- kind:
+    UnnecessaryDoubleCastOrProcess:
+      - tuple
+      - list
+  location:
+    row: 3
+    column: 0
+  end_location:
+    row: 3
+    column: 14
+  fix: ~
+- kind:
+    UnnecessaryDoubleCastOrProcess:
+      - list
+      - tuple
+  location:
+    row: 4
+    column: 0
+  end_location:
+    row: 4
+    column: 14
+  fix: ~
+- kind:
+    UnnecessaryDoubleCastOrProcess:
+      - tuple
+      - tuple
+  location:
+    row: 5
+    column: 0
+  end_location:
+    row: 5
+    column: 15
+  fix: ~
+- kind:
+    UnnecessaryDoubleCastOrProcess:
+      - set
+      - set
+  location:
+    row: 6
+    column: 0
+  end_location:
+    row: 6
+    column: 11
+  fix: ~
+- kind:
+    UnnecessaryDoubleCastOrProcess:
+      - list
+      - set
+  location:
+    row: 7
+    column: 0
+  end_location:
+    row: 7
+    column: 12
+  fix: ~
 - kind:
    UnnecessaryDoubleCastOrProcess:
      - tuple
      - set
  location:
    row: 8
-    column: 1
+    column: 0
  end_location:
    row: 8
-    column: 14
+    column: 13
  fix: ~
 - kind:
    UnnecessaryDoubleCastOrProcess:
@@ -85,10 +85,10 @@ expression: checks
      - set
  location:
    row: 9
-    column: 1
+    column: 0
  end_location:
    row: 9
-    column: 15
+    column: 14
  fix: ~
 - kind:
    UnnecessaryDoubleCastOrProcess:
@@ -96,10 +96,10 @@ expression: checks
      - set
  location:
    row: 10
-    column: 1
+    column: 0
  end_location:
    row: 10
-    column: 17
+    column: 16
  fix: ~
 - kind:
    UnnecessaryDoubleCastOrProcess:
@@ -107,10 +107,10 @@ expression: checks
      - sorted
  location:
    row: 11
-    column: 1
+    column: 0
  end_location:
    row: 11
-    column: 16
+    column: 15
  fix: ~
 - kind:
    UnnecessaryDoubleCastOrProcess:
@@ -118,10 +118,10 @@ expression: checks
      - sorted
  location:
    row: 12
-    column: 1
+    column: 0
  end_location:
    row: 12
-    column: 17
+    column: 16
  fix: ~
 - kind:
    UnnecessaryDoubleCastOrProcess:
@@ -129,10 +129,10 @@ expression: checks
      - sorted
  location:
    row: 13
-    column: 1
+    column: 0
  end_location:
    row: 13
-    column: 18
+    column: 17
  fix: ~
 - kind:
    UnnecessaryDoubleCastOrProcess:
@@ -140,9 +140,9 @@ expression: checks
      - sorted
  location:
    row: 14
-    column: 1
+    column: 0
  end_location:
    row: 14
-    column: 20
+    column: 19
  fix: ~

--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Charlie Marsh	138b06c98a	Bump version to 0.0.92	2022-10-30 18:04:30 -04:00
Charlie Marsh	2415d73260	Remove RustPython fork (#523 )	2022-10-30 18:04:05 -04:00
Charlie Marsh	b060ae2f22	Move SourceCodeLocator to its own module (#522 )	2022-10-30 15:51:59 -04:00
Charlie Marsh	9aa91d3d3c	Add a cargo bench for SourceCodeLocator (#521 )	2022-10-30 13:50:42 -04:00
Charlie Marsh	dcedb801e5	Tweak a few check messages (#520 )	2022-10-30 13:13:37 -04:00
Charlie Marsh	d3e7fdabb5	Implement consistent newline handling for SourceCodeLocator (#519 )	2022-10-30 13:11:08 -04:00
Charlie Marsh	dfa5a4f0f7	Fix 9/32 flake8-bugbear reference	2022-10-30 13:03:39 -04:00
Charlie Marsh	58a2d600da	Avoid flagging D202 for inner functions and classes (#518 )	2022-10-30 13:02:55 -04:00
Harutaka Kawamura	7ecbfe4f6a	Implement B006 (#515 )	2022-10-30 12:57:57 -04:00
Charlie Marsh	d8248104a7	Avoid re-indenting empty lines in D207 (#517 )	2022-10-30 09:41:54 -04:00
Charlie Marsh	6eb09122c0	Add final newline in SourceCodeLocator	2022-10-29 19:23:16 -04:00
Charlie Marsh	f84c1f1fa1	Bump version to 0.0.91	2022-10-29 18:49:26 -04:00
Charlie Marsh	3aa9528229	Avoid flake8-comprehensions errors for dicts with kwargs (#512 )	2022-10-29 18:49:06 -04:00
Charlie Marsh	5a3f06bab1	Bump version to 0.0.90	2022-10-29 18:34:38 -04:00
Charlie Marsh	db59d5b558	Use a single SourceCodeLocator everywhere (#510 )	2022-10-29 18:23:24 -04:00
Charlie Marsh	2fcbf3ab62	Simplify SourceCodeLocator offset computation (#509 )	2022-10-29 18:13:42 -04:00
Anders Kaseorg	fa9b10be72	Remove leading space from C416 message (#508 )	2022-10-29 17:40:50 -04:00
Charlie Marsh	c495cef529	Move pyproject.toml logging to debug (#506 )	2022-10-29 17:07:46 -04:00
Charlie Marsh	c0c8dff6ce	Implement configuration options for pep8-naming (#505 )	2022-10-29 17:00:30 -04:00
Charlie Marsh	80b00cc89f	Add error code categories to table of contents (#504 )	2022-10-29 16:39:55 -04:00
Charlie Marsh	934db3d179	Bump version to 0.0.89	2022-10-29 15:39:17 -04:00
Charlie Marsh	6a040a0405	Update checks_gen.rs	2022-10-29 15:39:02 -04:00
Harutaka Kawamura	2821ef0f69	Implement B013 (#503 )	2022-10-29 15:36:29 -04:00
Harutaka Kawamura	343d931ddb	Ignore unittest methods and functions in N802 (#502 )	2022-10-29 15:36:09 -04:00
Harutaka Kawamura	3fc257f71b	Implement N806, 815, 816, 818 (#501 )	2022-10-29 15:35:56 -04:00
Charlie Marsh	6dbb0a17e9	Update README to reflect selection groups	2022-10-28 19:15:46 -04:00
Charlie Marsh	ae5ad6a4ac	Bump version to 0.0.88	2022-10-28 19:11:04 -04:00
Charlie Marsh	549af6c584	Regenerate CheckCodePrefix	2022-10-28 19:10:45 -04:00