Closed
Description
openedon Apr 24, 2020
Steps to reproduce
from typing import Iterable
print(isinstance([], Iterable))
Similar issues exist for other generic collection types such as Sized
, Mapping
etc.
Current behavior
Second argument of isinstance is not a type (isinstance-second-argument-not-valid-type)
Expected behavior
No warning is issued.
When collections.abc.Iterable
is used instead, there is no warning issued. But the way that class is aliased in the typing
module is probably too complex for static analysis to deal with and there doesn't seem to be explicit support yet to work around that.
pylint --version output
$ pylint --version
pylint 2.5.0-dev1
astroid 2.4.0
Python 3.8.2 (default, Mar 05 2020, 18:58:42) [GCC]
The astroid
version is a dev snapshot as well, but not reported as such. To be exact, I'm using pylint
at 0ccf1bc and astroid
at f6a36d91.
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