Registry / testing / flake8-no-unnecessary-fstrings

flake8-no-unnecessary-fstrings

library1.0.1pypypi✓ verified 82d ago

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.

testing

pip install flake8-no-unnecessary-fstrings

github ↗package ↗changelog ↗

INSTALL

IMPORT

SIG · FLAKE8-NO-UNNECESS

flake8-no-unnecessary-fstrings

testingpythonv1.0.1

Install

1.9s avg

Import

—

Disk

18MB

Pass rate

10/ 10

Env Coverage10 / 10

glibc

3.9–3.13

musl

3.9–3.13

Install & Compatibility

Where this runs

tested against v1.0.1 · 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 0.000s · 19.4MB

glibc

py 3.10–3.95 runs

installs and imports cleanly · install 1.9s · import 0.000s · 20MB

18MB installed

● package 18MB

Code

Verified usage

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

NoUnnecessaryFstringChecker

✓ from flake8_no_unnecessary_fstrings import NoUnnecessaryFstringChecker

✗ from flake8_no_unnecessary_fstrings import F

Install the plugin, configure flake8 to ignore rule F (if desired), then run flake8 on a file. The plugin adds rule code F.

echo -e '[flake8]\nextend-ignore = F' > .flake8 && flake8 your_file.py

Debug

Known issues

gotchaThe plugin uses code 'F' for its rule, which conflicts with PyFlakes' F-coded rules. Ensure your flake8 configuration handles possible code collisions.

fix

Use flake8's --select or --ignore with full code e.g., '--ignore=F' vs '--ignore=F401'.

affects: all

gotchaDetects 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.

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.

affects: all

Upgrade

Version history

1.0.1latest on PyPI · released Sep 13, 2020

Audit

Dependencies

flake8requiredRequired as the hosting linter framework.

Agent activity

6 hits · last 30 days

node

Resources

githubhttps://github.com/northisup/flake8-no-unnecessary-fstrings ↗

packagehttps://pypi.org/project/flake8-no-unnecessary-fstrings/ ↗

changeloghttps://github.com/northisup/flake8-no-unnecessary-fstrings/blob/master/HISTORY.rst ↗