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python-code-smells

Finds common Python code smells with the ast module, such as bare except clauses, mutable default arguments, missing docstrings, very long functions and long argument lists. Use when the user asks for a quick review of Python code, a cleanup pass or a pre-commit style check.

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Lethe044/agentskill-kit48 stars(GitHub 48 + cccskills 0)

Run score Not tested

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Files included (3)

  • SKILL.md1.9 KB
  • scripts/smells.py3.4 KB
  • tests/cases.json1.1 KB

SKILL.md (original)

Review the instructions the agent will receive before you install.

Python code smells

A fast, dependency-free first pass over Python files. It does not replace a linter, it gives an agent concrete line numbers to start a review from.

When to use

  • The user asks to review, clean up or "look over" Python code.
  • Before a commit or pull request, to catch the obvious problems.
  • When a project has no linter configured yet.

How to run

python scripts/smells.py src/
python scripts/smells.py app.py utils.py --max-lines 40

Directories are searched recursively for .py files. Hidden folders and __pycache__ are skipped.

Rules

RuleMeaning
bare-exceptexcept: without an exception type hides real errors
mutable-defaulta list, dict or set used as a default argument value is shared between calls
missing-docstringa public function or class (no leading underscore) has no docstring
long-functiona function is longer than --max-lines (default 50)
too-many-argsa function takes more than --max-args parameters (default 6)
syntax-errorthe file could not be parsed

Output

JSON with files (number of files checked) and findings, a list of {"file", "line", "rule", "message"}. The exit code is 1 when there are findings and 0 otherwise.

After running

Group the findings by rule, fix the bugs first (bare-except, mutable-default), then the readability items. Do not add docstrings that only repeat the function name.

Errors

A path that does not exist exits with code 2.

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