Mypy: Syntax errors

[Dreamsorcerer]

By mistake, we started using the prerelease version 12.9.0b1 of azure-storage-blob in our CI.

This resulted in these syntax errors from mypy:

/opt/hostedtoolcache/Python/3.8.10/x64/lib/python3.8/site-packages/azure_storage_blob-12.9.0b1-py3.8.egg/azure/storage/blob/_serialize.py:46: error: Type signature has too few arguments [syntax]
/opt/hostedtoolcache/Python/3.8.10/x64/lib/python3.8/site-packages/azure_storage_blob-12.9.0b1-py3.8.egg/azure/storage/blob/_serialize.py:129: error: Type signature has too few arguments [syntax]
/opt/hostedtoolcache/Python/3.8.10/x64/lib/python3.8/site-packages/azure_storage_blob-12.9.0b1-py3.8.egg/azure/storage/blob/_blob_client.py:1408: error: Type signature has too few arguments [syntax]
/opt/hostedtoolcache/Python/3.8.10/x64/lib/python3.8/site-packages/azure_storage_blob-12.9.0b1-py3.8.egg/azure/storage/blob/_blob_client.py:1448: error: Type signature has too few arguments [syntax]

If you check the code at those locations, they are obviously wrong as the number of arguments in the type annotation does not match the number of arguments in the definition.

To avoid these mistakes in future, I'd suggest using the common-practice inline annotations, which would make it impossible to make this mistake:

def get_modify_conditions(kwargs: Dict[str, object]) -> ModifiedAccessConditions:

[swathipil]

Sam Bull (@Dreamsorcerer), thanks for the suggestion! Directing it to the right people, so they can address this!

[amishra-dev]

Thanks for reporting this Sam Bull (@Dreamsorcerer) (Sam). We are tracking this work as a part of #20083

[rnestler]

I fixed some of the type annotations in #20084