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urlretrieve can accept filename: pathlib.Path for Python>=3.6 #2194

merged 3 commits into from Jun 5, 2018


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scivision commented Jun 4, 2018

For Python >= 3.6, urllib.request.urlretrieve() can accept argument filename= str or pathlib.Path, this Pull Request is intended to allow type checkers to acknowledge this fact.

This was prompted by MyPy 0.600 giving error:

error: Argument 2 to "urlretrieve" has incompatible type "Path"; expected "Optional[str]"

when passing a pathlib.Path filename.

@@ -188,7 +189,7 @@ class HTTPErrorProcessor(BaseHandler):
def https_response(self) -> _UrlopenRet: ...

def urlretrieve(url: str, filename: Optional[str] = ...,
def urlretrieve(url: str, filename: Optional[Union[str, Path]] = ...,

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JelleZijlstra Jun 4, 2018


Can you add a version check if sys.version_info >= (3, 6): and allow os.PathLike[str] instead of just pathlib.Path?

scivision added some commits Jun 4, 2018


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scivision commented Jun 4, 2018

Thanks, and when I copy these changes into my own Python install, the original error message is no longer issued for my own .py code.

@JelleZijlstra JelleZijlstra merged commit 4890469 into python:master Jun 5, 2018

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yedpodtrzitko pushed a commit to yedpodtrzitko/typeshed that referenced this pull request Jan 23, 2019

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