sha,message,author_date,committer_date,raw_author,raw_committer,repo,author,committer
c5dbe98ce8957b6af5efa1308756296f7fa310c1,"Fix 2 type annotations in dataarray.py (#5548)

Both `set_index` and `reset_index` are wrappers to other methods that return `""DataArray""`, not `Optional[""DataArray""]`. That is, they will never return None. That's why these methods should also have only `""DataArray""` in there return signature. This way it will be possible to do something like `myarray = myarray.reset_index(...)` without getting a complaint from Mypy.

For extended discussion, see https://github.com/pydata/xarray/issues/5533#issuecomment-869822366",2021-06-29T18:51:18Z,2021-06-29T18:51:18Z,2a54caf8c2fbed59442098b8531a7b2afb3d3cee,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,28426758,19864447