PyCQA/pyflakes

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A simple program which checks Python source files for errors

Stars: 1.5k
Forks: 190
Open beginner issues: 0
Indexed issues: 44
Avg merge: 8m
Merged PRs (30d): 13

Dominant language: Python
License: MIT
Last GitHub push: Sep 2, 2026
Latest indexed: Sep 19, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted

Beginner friendly Everything

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44 open issues indexed

Remove Python <3.9 fallback for `ast.Index` Open

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

PyCQA/pyflakes#873 · Opened Sep 19, 2026
F542 is not a crime Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PyCQA/pyflakes#845 · 4 reactions · Opened Sep 1, 2025
setuptools deprecation warnings Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

PyCQA/pyflakes#835 · 2 comments · Opened Mar 31, 2025
Update CI to use modern PyPy versions Open

Difficulty 2/5 1-3 hours Newbie friendliness 52/100

PyCQA/pyflakes#828 · Opened Mar 30, 2025
Use of await in a function that is not async should be shown as a syntax error by flake8 Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

PyCQA/pyflakes#818 · 1 comment · Opened Oct 3, 2024
Proposed changes to pyflakes's traversal code. Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

PyCQA/pyflakes#816 · 1 comment · Opened Jul 9, 2024
F821 with Annotated import alias Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

PyCQA/pyflakes#789 · 1 comment · Opened Oct 17, 2023
branch analysis Open

Difficulty 5/5 Over a week Newbie friendliness 5/100

PyCQA/pyflakes#715 · Opened Jul 11, 2022
Warn about certain sequences of chained comparisons Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

PyCQA/pyflakes#690 · 1 comment · 1 reaction · Opened May 4, 2022
Check for invalid format specifiers Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

PyCQA/pyflakes#644 · Opened Jun 9, 2021
`typing.no_type_check` decorator is not being considered Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

PyCQA/pyflakes#595 · 2 comments · Opened Nov 28, 2020
unused variables in list comprehension not reported Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

PyCQA/pyflakes#593 · 3 comments · 1 reaction · Opened Nov 17, 2020
global keyword removes undefined variable warning Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

PyCQA/pyflakes#590 · 2 reactions · Opened Nov 3, 2020
REQ: Should handle unexpanded wildcards from commandline (Windows) Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

PyCQA/pyflakes#566 · 2 comments · 1 reaction · Opened Jul 19, 2020
False errors with named format string placeholders: "% ... has unsupported format character '(' " ... Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

PyCQA/pyflakes#562 · Opened Jun 29, 2020
Shadowing and unshadowing a builtin makes pyflakes emit a F821 Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

PyCQA/pyflakes#548 · Opened May 25, 2020
F822 (flake8): Type-only definitions in stubs and __all__ Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

PyCQA/pyflakes#533 · 3 comments · Opened Apr 23, 2020
Undefined comprehension variable in class body not caught Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

PyCQA/pyflakes#503 · 3 comments · Opened Jan 9, 2020
Decorated Function Should Be Considered Used Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

PyCQA/pyflakes#488 · 20 comments · 6 reactions · Opened Nov 13, 2019
Several syntax errors not caught Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

PyCQA/pyflakes#461 · 1 reaction · Opened Aug 8, 2019
Use pre-commit hook with flake8 for contributors Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

PyCQA/pyflakes#456 · 2 comments · Opened Jul 23, 2019
End column/lineno Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

PyCQA/pyflakes#454 · 13 comments · 1 reaction · Opened Jul 15, 2019
Pyflakes doesn't properly handle del inside function definition Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

PyCQA/pyflakes#428 · 1 comment · 2 reactions · Opened Feb 8, 2019
Support for Code Climate reporting format Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

PyCQA/pyflakes#418 · 7 comments · Opened Jan 26, 2019
Flag unused closure defined function / class definitions Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

PyCQA/pyflakes#392 · 1 comment · 1 reaction · Opened Nov 22, 2018
"Local variable (defined in enclosing scope) referenced before assignment" wording is misleading Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

PyCQA/pyflakes#390 · 2 comments · 1 reaction · Opened Nov 15, 2018
False positive: F401 'foo' imported but unused; when marking variable as global variable in a function Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

PyCQA/pyflakes#389 · 1 comment · 2 reactions · Opened Nov 13, 2018
Treat global dunder names as always used Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PyCQA/pyflakes#387 · 2 comments · Opened Nov 4, 2018
F841 reports misleading location in try/except block Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

PyCQA/pyflakes#378 · 3 comments · Opened Oct 30, 2018
F811 redefinition of unused incorrectly triggered for `__class__` Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

PyCQA/pyflakes#372 · 1 reaction · Opened Oct 18, 2018
Python 3 UnboundLocalError not detected when variable referenced after shadowed by exception variable Open

python3

Difficulty 3/5 1-2 days Newbie friendliness 45/100

PyCQA/pyflakes#345 · 2 comments · Opened Jul 18, 2018
Subtle output flushing issue in Python 3.4 Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

PyCQA/pyflakes#289 · 11 comments · Opened Aug 29, 2017
Imports and methods fall in the same namespace? Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

PyCQA/pyflakes#268 · 4 comments · 2 reactions · Opened Mar 24, 2017
finds mangled globals and freevars undefined/unused Open

bug help wanted

Difficulty 3/5 1-2 days Newbie friendliness 45/100

PyCQA/pyflakes#267 · 2 comments · Opened Mar 22, 2017
erroneous 'undefined name' in exception handling + lambda Open

help wanted

Difficulty 3/5 1-2 days Newbie friendliness 38/100

PyCQA/pyflakes#265 · 2 comments · Opened Mar 3, 2017
global/local syntax errors not caught Open

enhancement help wanted

Difficulty 4/5 3-5 days Newbie friendliness 35/100

PyCQA/pyflakes#249 · 3 comments · Opened Jun 8, 2016
Warn on Unassigned `==` Expression as Statement Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

PyCQA/pyflakes#237 · 5 comments · Opened Dec 5, 2015
Warn on "raise StopIteration" Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

PyCQA/pyflakes#235 · Opened Nov 11, 2015
maximum recursion depth exceeded in 1050 string join Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

PyCQA/pyflakes#231 · 7 comments · 3 reactions · Opened Oct 20, 2015
warn on locals() Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

PyCQA/pyflakes#179 · 7 comments · Opened Oct 17, 2015
contribute checking for "miscaptured" variables in loops Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

PyCQA/pyflakes#177 · Opened Aug 14, 2014
inconsistent behavior with locals(), comprehensions and the unused local variable warning Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

PyCQA/pyflakes#136 · 1 comment · 1 reaction · Opened Jun 3, 2014
Add option to select scope for doctests Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PyCQA/pyflakes#161 · 14 comments · Opened May 10, 2013
[Feature] Add hosted docs Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

PyCQA/pyflakes#153 · 4 comments · 1 reaction · Opened Feb 2, 2013

PyCQA/pyflakes

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