Add type hints to opentelemetry-sdk and run as a part of tests

[srikanthccv]

Much of opentelemetry-sdk code doesn't have type hints. It would be great to add mypy type hints and run the tests similar to opentelemetry-api.

[codeboten]

Related to #773

[aabmass]

I've looked into this a few times and there were really annoying issues with namespace packages and finding the code. Mypy 0.8xx (#1575) has made huge improvements there and I think it should be much cleaner now. Like you mentioned, there is a lot of untyped code and code with types that was added as a best effort without running mypy. I think we will need a really relaxed config or start with only a few SDK files and slowly work up.

It would be awesome if we could get a nicer pattern for tox/mypy/setuptools so any new packages we scaffold will be fully checked from the start

[dmolenda-sumo]

I recently updated mypy to 0.812 version (#1705). Finding code inside packages is much easier right now, so I can take care of running mypy tests for opentelemetry-sdk. Could you assign me to this issue?

[github-actions]

This issue was marked stale due to lack of activity. It will be closed in 30 days.

[lzchen]

@dmolenda-sumo
Are you still working on this?

[dmolenda-sumo]

Yes, I do. I've been a little busy recently, but I hope to finish this task soon

[github-actions]

This issue was marked stale due to lack of activity. It will be closed in 30 days.