complex-if-statement-in-stub (PYI002)

Derived from the flake8-pyi linter.

What it does

Checks for if statements with complex conditionals in stubs.

Why is this bad?

Stub files support simple conditionals to test for differences in Python versions and platforms. However, type checkers only understand a limited subset of these conditionals; complex conditionals may result in false positives or false negatives.

Example

import sys

if (2, 7) < sys.version_info < (3, 5):
    ...

Use instead:

import sys

if sys.version_info < (3, 5):
    ...