issue_comments: 642554509

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https://github.com/pydata/xarray/pull/4144#issuecomment-642554509 https://api.github.com/repos/pydata/xarray/issues/4144 642554509 MDEyOklzc3VlQ29tbWVudDY0MjU1NDUwOQ== 10194086 2020-06-11T10:20:33Z 2020-06-11T10:20:33Z MEMBER

The mypy check throws an error: xarray/core/dataset.py:1250: error: Overloaded function signature 2 will never be matched: signature 1's parameter type(s) are the same I think you can ignore the other failures. Should that be:

```python @overload def getitem(self, key: Hashable) -> DataArray: ...

@overload
def __getitem__(self, key: Iterable[Hashable]) -> "Dataset":
    ...

`` ? Only guessing, though - it wasAny` so there may be more options. @crusaderky 

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