[issue37804] Remove Thread.isAlive in Python 3.9

[Jelle Zijlstra]

Change by Jelle Zijlstra <jelle.zijlstra at gmail.com>:


----------
pull_requests: +23916
pull_request: https://github.com/python/cpython/pull/25174

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37804>
_______________________________________