ImportError: cannot import name 'a' from 'module'

What it does

Checks for imports of symbols that may be missing.

Why is this bad?

Importing a missing module or name will raise a ModuleNotFoundError or ImportError at runtime.

Rule status

This rule is currently disabled by default because of the number of false positives it can produce.

Examples

module.py:

import datetime

if datetime.date.today().weekday() != 6:
    a = 1

main.py:

# ImportError: cannot import name 'a' from 'module'
from module import a  # error