csv not realising type 'TextIO' is compatible with 'SupportsWrite[str]'.

[FreeAndFrei]

Documentation

It seems like we should update the type check for csv.DictWriter()

[StanFromIreland]

This is a problem with Pycharm, not cpython.

For me, Pycharm doesn't even raise the error, it does not complain about TextIO.

This should be closed as not planned.

[sobolevn]

This is clearly an issue with PyCharm: https://mypy-play.net/?mypy=latest&python=3.12&gist=35f4b505b8d4b6de5f03c51da21e402a