pytest-flakes

library4.0.5pypypi✓ verified 86d ago

A pytest plugin that checks Python source code for logical errors using pyflakes. It integrates seamlessly into the pytest ecosystem, automatically running pyflakes on all collected test files and source files. Current version 4.0.5 supports Python >=3.5. The plugin is in maintenance mode; no new features are expected.

testing

pip install pytest-flakes

github ↗package ↗

INSTALL

IMPORT

SIG · PYTEST-FLAKES

pytest-flakes

testingpythonv4.0.5

Install

2.9s avg

Import

547ms

Disk

30MB

Pass rate

10/ 10

Env Coverage10 / 10

glibc

3.9–3.13

musl

3.9–3.13

Install & Compatibility

Where this runs

tested against v4.0.5 · pip install

no network on importno background threads

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

py 3.10–3.95 runs

installs and imports cleanly · install 0.0s · import 0.580s · 31.5MB

glibc

py 3.10–3.95 runs

installs and imports cleanly · install 2.9s · import 0.514s · 32MB

30MB installed

● package 30MB

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

pytest_flakes

✓ import pytest_flakes

✗ from pytest_flakes import ...

Common mistake: users try to import submodules, but the plugin is automatically registered when installed.

Create a test file (e.g., test_demo.py). Run pytest normally. The plugin will automatically check all Python files for pyflakes errors.

import pytest import sys sys.path.insert(0, 'src') def test_ok(): x = 1 assert x

Debug

Known issues

gotchaThe plugin checks all collected Python files, not just test files. This can cause unexpected failures in third-party code if you have a large source tree. Use --flakes-ignore to exclude files.

fix

Configure pytest.ini with flakes-ignore = path/to/ignore*

affects: all

gotchaDoes not work with Python 3.10+? Actually, pyflakes supports up to Python 3.8. But pytest-flakes may still work with newer Python as long as pyflakes parses the code. However, there may be false negatives for newer syntax (match statements, etc.).

fix

Consider using flake8 for modern Python syntax support.

affects: 4.x

Errors

Common errors & fixes

ModuleNotFoundError: No module named 'pyflakes'

Missing dependency pyflakes

fix

pip install pyflakes

ERROR: usage: pytest [options] [file_or_dir] [file_or_dir] [...] pytest: error: unrecognized arguments: --flakes

pytest-flakes is not installed or not activated

fix

pip install pytest-flakes and ensure it's in the test environment

Upgrade

Version history

4.0.5latest on PyPI · released Dec 2, 2021

Audit

Dependencies

pytestrequiredRequired to run the plugin

pyflakesrequiredCore dependency for code checking

Agent activity

14 hits · last 30 days

node

Resources

githubhttps://github.com/asmeurer/pytest-flakes ↗

packagehttps://pypi.org/project/pytest-flakes/ ↗