dunder-function-name (N807)

Derived from the pep8-naming linter.

What it does

Checks for functions with "dunder" names (that is, names with two leading and trailing underscores) that are not documented.

Why is this bad?

PEP 8 recommends that only documented "dunder" methods are used:

..."magic" objects or attributes that live in user-controlled namespaces. E.g. __init__, __import__ or __file__. Never invent such names; only use them as documented.

Example

def __my_function__():
    pass

Use instead:

def my_function():
    pass