Freeze installed packages into a requirements file with pip freeze
domain: python-dependency-management · 3 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
Run python -m pip freeze to print installed packages in requirements format, sorted case-insensitively.
Redirect to a file with python -m pip freeze > requirements.txt.
Reuse it in another environment with python -m pip install -r requirements.txt.
Known gotchas
For a complete snapshot including pip, setuptools, wheel, and distribute, add --all; default exclusions differ by Python version (3.12 and later excludes only pip, while 3.11 and earlier also skips setuptools, wheel, and distribute).
freeze reports what is currently installed; it is not a dependency-solver lockfile.
Inside a venv with global access use --local to omit globals, and --exclude <package> to drop specific packages.
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