Update the default Python version from 3.12 to 3.13 #299
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Previously if a new app did not specify a Python version (e.g. via a `.python-version` file), then the buildpack would default to the latest Python 3.12 release. Now the buildpack will use the latest Python 3.13 release. Apps that aren't compatible with Python 3.13 will now need to request Python 3.12 explicitly by creating a `.python-version` file containing: `3.12` Note: Unlike in the classic Python buildpack, this change will affect existing apps too, since the CNB does not perform version pinning (due to the UX and app to app consistency issues it causes). Users are strongly advised to never rely on the default version, and instead set an explicit major Python version using a `.python-version` file. See: https://docs.python.org/3.13/whatsnew/3.13.html GUS-W-14846979.
joshwlewis
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Dec 6, 2024
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Dec 10, 2024
## heroku/python ### Changed - Updated the default Python version from 3.12 to 3.13. ([#299](heroku/buildpacks-python#299)) - Updated Poetry from 1.8.4 to 1.8.5. ([#300](heroku/buildpacks-python#300))
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Previously if an app did not specify a Python version (e.g. via a
.python-versionfile), then the buildpack would default to the latest Python 3.12 release.Now the buildpack will use the latest Python 3.13 release.
Apps that aren't compatible with Python 3.13 will now need to request Python 3.12 explicitly by creating a
.python-versionfile containing:3.12Note: Unlike in the classic Python buildpack, this change will affect existing apps too, since the CNB does not perform version pinning (due to the UX and app to app consistency issues it causes). Users are strongly advised to never rely on the default version, and instead set an explicit major Python version using a
.python-versionfile.See:
https://docs.python.org/3.13/whatsnew/3.13.html
GUS-W-14846979.