PyCQA / PyCQA/pycodestyle

E731 false negatives

Open
#1,061 3 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Dominant language
Python
Stars
5.2k
Forks
754
PR merge metrics
No merged PRs in 30d

Description

a = lambda x: x  # Raises E731
a = (
    lambda x: x 
) # Doesn't raise E731
a, b = lambda x: x, lambda y: y  # Doesn't raise E731
a, b = 1, lambda y: y  # Doesn't raise E731

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Use the four Python snippets in the issue as reproduction cases and inspect the repository's E731 implementation in its single Python file. Compare which assignments are reported and which are missed, then run the existing test suite to verify that the false-negative cases are covered and corrected.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
tooling
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.