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Use ABC imports from collections.abc for Python 3.9 compatibility #538

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tirkarthi opened this issue Jan 4, 2020 · 0 comments

tirkarthi commented Jan 4, 2020

Python 3.9 removed importing ABC from collections module directly in python/cpython#10596. This was deprecated since Python 3.4.

I noticed these deprecation warnings in Travis CI for celery : https://travis-ci.org/celery/celery/jobs/632293936#L3181-L3195

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