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Check PEP-8 naming conventions, plugin for flake8

Project description

Check your code against PEP 8 naming conventions.

This module provides a plugin for flake8, the Python code checker.

(It replaces the plugin flint-naming for the flint checker.)


You can install, upgrade, uninstall pep8-naming with these commands:

$ pip install pep8-naming
$ pip install --upgrade pep8-naming
$ pip uninstall pep8-naming

Plugin for Flake8

When both flake8 and pep8-naming are installed, the plugin is available in flake8:

$ flake8 --version
4.0.1 (mccabe: 0.6.1, naming: 0.13.0, pycodestyle: 2.8.0, pyflakes: 2.4.0) CPython 3.8.10 on Linux

By default the plugin is enabled.

Error Codes

These error codes are emitted:


sample message


class names should use CapWords convention (class names)


function name should be lowercase (function names)


argument name should be lowercase (function arguments)


first argument of a classmethod should be named ‘cls’ (function arguments)


first argument of a method should be named ‘self’ (function arguments)


variable in function should be lowercase


function name should not start and end with ‘__’


constant imported as non constant (constants)


lowercase imported as non-lowercase


camelcase imported as lowercase


camelcase imported as constant (distinct from N817 for selective enforcement)


mixedCase variable in class scope (constants, method names)


mixedCase variable in global scope (constants)


camelcase imported as acronym (distinct from N814 for selective enforcement)


error suffix in exception names (exceptions)


The following flake8 options are added:


Ignore errors for specific names or glob patterns.

Currently, this option can only be used for N802, N803, N804, N805, N806, N815, and N816 errors.

Default: setUp,tearDown,setUpClass,tearDownClass,setUpModule,tearDownModule,asyncSetUp,asyncTearDown,setUpTestData,failureException,longMessage,maxDiff.


List of method decorators pep8-naming plugin should consider class method.

Used to prevent false N804 errors.

Default: classmethod.


List of method decorators pep8-naming plugin should consider static method.

Used to prevent false N805 errors.

Default: staticmethod.

Project details

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