Comments (1)
This is a bug in mypy
: python/mypy#3004
Here's a simple example:
from typing import Union
class Foobar:
def __init__(self, x: Union[int, str]):
self._x = self.makestr(x)
def makestr(self, x: Union[int, str]) -> str:
if isinstance(x, int):
return str(x)
elif isinstance(x, str):
return x
else:
raise Exception("invalid type")
@property
def x(self) -> str:
return self._x
@x.setter
def x(self, x: Union[int, str]) -> None:
self._x = self.makestr(x)
fb = Foobar("abc")
fb.x = 3
mypy will then report:
mypyasym.py:26: error: Incompatible types in assignment (expression has type "int", variable has type "str")
from pandas-stubs.
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from pandas-stubs.