flake8 doesn't report mixed-case function names

Question

I created a short script called test_pep8.py containing the following:

def myFunc():
    return None

I would expect flake8 to produce a warning about mixed case function names. But, flake8 reports no warnings:

> flake8 --verbose test_pep8.py
checking test_pep8.py

I then ran pep8 directly on the file and got the same result:

import pep8
checker = pep8.Checker('test_pep8.py')
checker.check_all()
> 0

Checking out the pep8 library, I noticed this set of default ignores:

DEFAULT_IGNORE = 'E121,E123,E126,E226,E24,E704'

But, incorrect function naming doesn't appear to be listed.

Here's my flake8 version info:

> flake8 --version
2.3.0 (pep8: 1.6.2, pyflakes: 0.8.1, mccabe: 0.3) CPython 2.6.6 on Linux

Anyone know why flake8 is not reporting this pep8 violation? Thanks!

EDIT: Just spotted this module: https://pypi.python.org/pypi/pep8-naming Is pep8 naming now enforced by a different library? I seem to remember pep8 covering that before, but I could be mistaken.

pep8-naming does seem to be the solution:

> flake8 --verbose test_pep8.py
checking test_pep8.py
test_pep8.py:5:5: N802 function name should be lowercase

Answer 1

You need to install pep8-naming

pip install pep8-naming

and you should also include it in your pip requirements.txt

flake8
pep8-naming

Additional plugins/extensions for flake8 can be found at https://pypi.org/search/?q=flake8-