{"id":23736,"library":"flake8-no-unnecessary-fstrings","title":"flake8-no-unnecessary-fstrings","description":"A flake8 plugin that flags unnecessary f-strings (e.g., f\"{var}\" where a simple string or format would do). Current version: 1.0.1. Release cadence is low; no recent updates.","status":"active","version":"1.0.1","language":"python","source_language":"en","source_url":"https://github.com/northisup/flake8-no-unnecessary-fstrings","tags":["flake8","plugin","fstrings","linting","python"],"install":[{"cmd":"pip install flake8-no-unnecessary-fstrings","lang":"bash","label":"Install via pip"}],"dependencies":[{"reason":"Required as the hosting linter framework.","package":"flake8","optional":false}],"imports":[{"note":"The plugin registers itself via setup.cfg; direct import of the plugin class is rarely needed.","wrong":"","symbol":"F","correct":"from flake8_no_unnecessary_fstrings import F"}],"quickstart":{"code":"echo -e '[flake8]\\nextend-ignore = F' > .flake8 && flake8 your_file.py","lang":"bash","description":"Install the plugin, configure flake8 to ignore rule F (if desired), then run flake8 on a file. The plugin adds rule code F."},"warnings":[{"fix":"Use flake8's --select or --ignore with full code e.g., '--ignore=F' vs '--ignore=F401'.","message":"The plugin uses code 'F' for its rule, which conflicts with PyFlakes' F-coded rules. Ensure your flake8 configuration handles possible code collisions.","severity":"gotcha","affected_versions":"all"},{"fix":"Understand the rule's intent: ban f-strings that don't use f-string features (like formatting or multiple expressions). Consider disabling with --no-necessary-fstrings or adding noqa.","message":"Detects f-strings with no expressions as unnecessary, but also flags f-strings with only simple variable references (e.g., f\"{var}\"). This may be overly aggressive if you prefer f-strings for consistency.","severity":"gotcha","affected_versions":"all"}],"env_vars":null,"last_verified":"2026-05-01T00:00:00.000Z","next_check":"2026-07-30T00:00:00.000Z","problems":[{"fix":"Reinstall with 'pip install flake8-no-unnecessary-fstrings' and run 'flake8 --install-hook' or clear cache with 'flake8 --clear-cache'.","cause":"The plugin is not installed or flake8 cache is stale.","error":"flake8: F is not a recognized error code or it is being ignored"},{"fix":"Explicitly enable the rule with '--select=F' in your flake8 configuration.","cause":"The rule code may conflict with other plugins or flake8's built-in rules.","error":"flake8 no longer shows F error after upgrade"}],"ecosystem":"pypi","meta_description":null,"install_score":null,"install_tag":null,"quickstart_score":null,"quickstart_tag":null}