Check syntax without running

Compile to bytecode only to catch syntax errors

python3 -m py_compile script.py && echo OK
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python15 commands
tags
pythondebug

More python commands

  • Format code with black
    black --check --diff . && black .

    Preview changes then apply Black formatting

  • Lint with ruff
    ruff check . --fix

    Fast linter + auto-fix (replaces flake8, isort, pyupgrade)

  • Type check with mypy
    mypy --strict --ignore-missing-imports src/

    Strict static type checking for a package

  • Inspect object attributes
    python3 -c "import json; print([x for x in dir(json) if not x.startswith('_')])"

    List public attributes of any Python object

  • Create virtual environment
    python3 -m venv .venv && source .venv/bin/activate

    Create and activate an isolated Python environment

all 15 python commands