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Fix type hints #125

Merged
merged 9 commits into from
Aug 10, 2023
Merged

Fix type hints #125

merged 9 commits into from
Aug 10, 2023

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jl-wynen
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@jl-wynen jl-wynen commented Aug 7, 2023

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@@ -396,7 +398,7 @@ def _get_or_add_orig_datablock(self, key: Union[int, str]) -> OrigDatablock:

def make_upload_model(self) -> Union[UploadDerivedDataset, UploadRawDataset]:
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Can UploadDerivedDataset and UploadRawDataset be TypeVar instead?
If the model is Type[UploadRawDataset], the returned model is UploadRawDataset for example, right...?

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But this method doesn't take any arguments except self. So how would you match the type of the model?

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Oh Sorry I thought the model was also an input. Never mind...

@@ -86,7 +88,7 @@ def to_local(self) -> PurePath:

def __truediv__(self, other: Union[str, RemotePath]) -> RemotePath:
"""Join two path segments."""
if isinstance(other, (PurePath, Path)):
if isinstance(other, (PurePath, Path)): # type: ignore[unreachable]
raise TypeError("OS paths are not supported when concatenating RemotePath.")
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I have a question how a type-checker would decide unreachable...
will this line below will also be considered unreachable...?

if not isinstance(other, (str, RemotePath)) and isinstance(other, (PurePath, Path)):
    raise ...

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I guess so. It must be based on the argument type hints. And mypy then assumes that no invalid type is ever passed in.

@jl-wynen jl-wynen merged commit c7d6272 into main Aug 10, 2023
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@jl-wynen jl-wynen deleted the fix-type-hints branch August 10, 2023 06:53
@jl-wynen jl-wynen mentioned this pull request Aug 15, 2023
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2 participants