Python Enhancement Proposals

The PEPs in this repo are published automatically on the web at https://peps.python.org/. To learn more about the purpose of PEPs and how to go about writing one, please start reading at PEP 1. Note that the PEP Index (PEP 0) is automatically generated based on the metadata headers in other PEPs.

Canonical links

The canonical form of PEP links are zero-padded, such as https://peps.python.org/pep-0008/.

Shortcut redirects are also available. For example, https://peps.python.org/8 redirects to the canonical link.

Contributing to PEPs

See the Contributing Guidelines.

Checking PEP formatting and rendering

Please don't commit changes with reStructuredText syntax errors that cause PEP generation to fail, or result in major rendering defects relative to what you intend.

Browse the "Read the Docs" preview

For every PR, we automatically create a preview of the rendered PEPs using Read the Docs. You can find it in the merge box at the bottom of the PR page:

Click "Show all checks" to expand the checks section
Find the line for docs/readthedocs.org:pep-previews
Click on "Details" to the right

Render PEPs locally

See the build documentation for full instructions on how to render PEPs locally. In summary, run the following in a fresh, activated virtual environment:

# Install requirements
python -m pip install -U -r requirements.txt

# Build the PEPs
make html

# Or, if you don't have 'make':
python build.py

The output HTML is found under the build directory.

Check and lint PEPs

You can check for and fix common linting and spelling issues, either on-demand or automatically as you commit, with our pre-commit suite. See the Contributing Guide for details.

davepeck/peps

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