mypy, isinstance, and generics, oh my!
ewa opened this issue · 0 comments
ewa commented
I don't know if this is user error or a bug, but when I try to typecheck the following code (basically copied from USERDOC.md) with mypy
I get an error:
The code:
print(isinstance(np.random.randn(5, 2), NDArray[Shape["5 coordinates, [x, y]"], Any]))
The error
% mypy error_example.py
error_example.py:5: error: Parameterized generics cannot be used with class or instance checks [misc]
Found 1 error in 1 file (checked 1 source file)
Does anyone have any suggestions?
Here's my configuration info:
ewa-mbp:~/ext/sounder andersoe % pip3 list | grep nptyping
nptyping 2.5.0
ewa-mbp:~/ext/sounder andersoe % pip3 list | grep mypy
mypy 1.3.0
mypy-extensions 1.0.0
ewa-mbp:~/ext/sounder andersoe % pip3 list | grep numpy
numpy 1.24.3
ewa-mbp:~/ext/sounder andersoe % python3 --version
Python 3.11.3
The full code examples is:
import numpy as np
from typing import Any
from nptyping import NDArray, Shape
print(isinstance(np.random.randn(5, 2), NDArray[Shape["5 coordinates, [x, y]"], Any]))