help wantedstubs: false negative
Repository metrics
- Stars
- (3,436 stars)
- PR merge metrics
- (Avg merge 12d 21h) (66 merged PRs in 30d)
Description
Right now TarFile.__init__ is defined as: https://github.com/python/typeshed/blob/c7e29eccd9759411c0f46580e20727038668b320/stdlib/tarfile.pyi#L128-L132
Which is not exactly right, because there's a case when name and fileobj are both None at the same time. And this will lead to runtime errors:
>>> import tarfile
>>> tarfile.TarFile(None, fileobj=None)
Traceback (most recent call last):
File "<python-input-2>", line 1, in <module>
tarfile.TarFile(None, fileobj=None)
~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^
File "/Users/sobolev/Desktop/cpython/Lib/tarfile.py", line 1729, in __init__
fileobj = bltn_open(name, self._mode)
TypeError: expected str, bytes or os.PathLike object, not NoneType
Right now mypy does not raise any errors for this broken case: https://mypy-play.net/?mypy=latest&python=3.12&gist=7452d274249fafba1f8a16565d5486c6
We need either name or fileobj, they can be both None at the same time. So, we need to add overloads.
There are several other methods that needs to be updated like open and taropen, maybe others.