[issue35109] Doctest in CI uses python binary built from master causing DeprecationWarnings

[Karthikeyan Singaravelan]

Karthikeyan Singaravelan <tir.karthi at gmail.com> added the comment:

I have an open PR for babel https://github.com/python-babel/babel/pull/608 . The problem is merging them and cutting a new release depends on the maintainers availability. Once it's fixed we have to make sure dependencies of babel like sphinx use the latest version and also make a release if needed. I agree it has to be fixed on those projects but coordinating release across various projects depends on the maintainers availability and shouldn't end up as a blocker for CPython's development here and in future with these type of deprecation warnings. I suggested using a stable version because when ran locally make venv for doctest uses python3 as binary name and on CI it uses python built from master branch that might cause confusion. Also it's not necessarily CPython's responsibility to make sure all our external projects work well on development branch.

We can keep this as an open issue while the warnings are fixed in the projects and also use this for reference when the collections import related code has to be removed.

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<https://bugs.python.org/issue35109>
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