v0.21.0

heroku/python

Changed

• The build now fails early if known problematic Python and pip-related env vars have been set by the user or earlier buildpacks. (#308)
• The PIP_PYTHON env var is now only set at build time. (#307)

Removed

• Stopped setting the LANG env var. (#306)
• Stopped setting the PYTHONHOME env var. (#309)

v0.20.1

heroku/python

Fixed

• Fixed colour resetting for build output header, error and warning messages. (#303 / heroku/libcnb.rs#890)

v0.20.0

heroku/python

Changed

• Updated the default Python version from 3.12 to 3.13. (#299)
• Updated Poetry from 1.8.4 to 1.8.5. (#300)

v0.19.2

heroku/python

Changed

• The Python 3.13 version alias now resolves to Python 3.13.1. (#297)
• The Python 3.12 version alias now resolves to Python 3.12.8. (#297)
• The Python 3.11 version alias now resolves to Python 3.11.11. (#297)
• The Python 3.10 version alias now resolves to Python 3.10.16. (#297)
• The Python 3.9 version alias now resolves to Python 3.9.21. (#297)

v0.19.1

heroku/python

Changed

• Updated pip from 24.2 to 24.3.1. (#285)
• Updated Poetry from 1.8.3 to 1.8.4. (#286)

v0.19.0

heroku/python

Added

• Added support for Python 3.13. (#280)

v0.18.1

heroku/python

Changed

• Updated the Python 3.12 version alias to Python 3.12.7. (#276)

v0.18.0

heroku/python

Added

• The Python version can now be configured using a .python-version file. Both the 3.X and 3.X.Y version forms are supported. (#272)

Changed

• pip is now only available during the build, and is no longer included in the final app image. (#264)
• Improved the error messages shown when an end-of-life or unknown Python version is requested. (#272)

v0.17.1

heroku/python

Changed

• Updated the default Python version from 3.12.5 to 3.12.6. (#266)

v0.17.0

heroku/python

Added

• Added initial support for the Poetry package manager. (#261)