Import ABC from collections.abc for Python 3.10 compatibility

[tirkarthi]

Description

Import ABC from collections.abc for Python 3.10 compatibility since importing from collections directly was deprecated and removed in Python 3.10

Related Issue

Type of Change

• Examples / docs / tutorials / contributors update
• Bug fix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves an existing feature)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

PR review

Anyone in the community is free to review the PR once the tests have passed.
If we didn't discuss your PR in Github issues there's a high chance it will not be merged.

Checklist

• Have you updated tests for the new functionality?
• Have you added your new classes/functions to the docs?
• Have you updated the CHANGELOG?
• Have you run colab minimal CI/CD with latest requirements? Please attach the notebook link.
• Have you run colab minimal CI/CD with minimal requirements? Please attach the notebook link.
• Have you checked XLA integration? Please attach the notebook link.
• Have you checked distributed XLA integration? Please attach the notebook link.

[ShuhuaGao]

Why is this PR not merged? The current version 22.02.1 does not work in Python 3.10 due to the above issue. In fact, collections.abc appears in Python 3.3 (https://docs.python.org/3/library/collections.abc.html)

[Scitator]

@ShuhuaGao we are waiting for the tests to launch, but it looks like we caught github issue here
@tirkarthi it would be great if you could resubmit your PR, thanks!

PS. sorry, I have a long ping nowadays - too many conferences.

[CLAassistant]

All committers have signed the CLA.

[tirkarthi]

I have closed and reopened the PR. It should trigger tests.

[Scitator]

looks like we have a bunch of requirements related issues 😢
I will merge this PR, but it would be great if someone will PR the requirements fix. thanks in advance!

[tirkarthi]

Thanks @Scitator