Use Python 3.12 as the default Python version for new apps #1516
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Previously if a new app did not specify a Python version via a `runtime.txt` file or the appropriate `Pipfile` config option, then the buildpack would default to the latest Python 3.11 release. Now the buildpack will use the latest Python 3.12 release. This does not affect: * apps that specify an explicit Python version * existing apps that have already had a build using the previous default version (since that version is remembered from one build to the next, via the "sticky versions" feature). Use-cases involving new apps that aren't compatible with Python 3.12 will now need to specify Python 3.11 explicitly: https://devcenter.heroku.com/articles/python-support#specifying-a-python-version However most apps should be compatible, since Python 3.12 was released a couple of months ago (2023-10-02), does not contain significant breaking changes over Python 3.11, and has been happily used by the python-getting-started project since 2023-10-04. See: https://docs.python.org/3.12/whatsnew/3.12.html GUS-W-14217493.
Malax
approved these changes
Dec 5, 2023
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Previously if a new app did not specify a Python version via a
runtime.txtfile or the appropriatePipfileconfig option, then the buildpack would default to the latest Python 3.11 release.Now the buildpack will use the latest Python 3.12 release.
This does not affect:
Use-cases involving new apps that aren't compatible with Python 3.12 will now need to specify Python 3.11 explicitly:
https://devcenter.heroku.com/articles/python-support#specifying-a-python-version
However most apps should be compatible, since Python 3.12 was released a couple of months ago (2023-10-02), does not contain significant breaking changes over Python 3.11, and has been happily used by the python-getting-started project since 2023-10-04.
See:
https://docs.python.org/3.12/whatsnew/3.12.html
GUS-W-14217493.