PEP 425
lastmod 2026-11-10created 2021-03-133 edits
PEP 425 is a proposal that defines the compatibility tag scheme indicating which environments a Python binary distribution (wheel) can be installed in. A tag consists of three parts: the Python implementation and version (cp311), the ABI (abi3, etc.), and the platform (manylinux, win_amd64), and it goes directly into the wheel file name. pip picks the wheel to install by comparing the list of tags the current interpreter supports against the tags in the file name.
Compatibility Tags for Built Distributions