{CI} Use Python 3.10 as the default and disable Python 3.9 tests #20287
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yonzhan
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Nov 11, 2021
evelyn-ys
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calvinhzy
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Description
Python 3.9.8 introduced an unexpected breaking change (python/cpython#28420) that breaks Azure CLI:
According to https://bugs.python.org/issue45235, this change will be reverted on 3.9 and withdrawn from future releases for other version like 3.7, 3.8, 3.10.
Azure Pipeline now only has Python 3.9.8, but not old versions like 3.9.7:
Even if Python releases 3.9.9 which reverts this change, it will take Azure Pipeline weeks to take that version.
To unblock our development and PRs from being merged, we have to use Python 3.10 as the default (thanks to the timely support for Python 3.10 (#19857)) and disable Python 3.9 tests.