packaging
JSON →Reusable core utilities for Python packaging interoperability specifications. Implements PEP 440 version handling, specifiers, markers, requirements, tags, metadata, and lockfiles. Used internally by pip, setuptools, and most build tools. Uses calendar-based versioning (YY.N). Current version is 26.0 (2026).
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Resources
API endpoints
full doc /v1/registry/packaging
install /v1/registry/packaging/install
compatibility /v1/registry/packaging/compatibility