In mypy 0.710 due to I suppose commit e45f443, functools partial no longer corresponds with the docs, https://docs.python.org/3/library/functools.html#partial-objects
The docs state they're objects with func, args, and keywords, but they're no longer defined as such, thus cannot be annotated as partial, cannot access the documented attributes etc. For example, this resulted in no problem output with mypy 0.701:
from functools import partial
from typing import Callable
def foo(bar: Callable) -> None:
func = bar
while isinstance(func, partial):
func = func.func
...but now with 0.710 gives:
t.py:6: error: Argument 2 to "isinstance" has incompatible type overloaded function; expected "Union[type, Tuple[Union[type, Tuple[Any, ...]], ...]]"
t.py:7: error: "Callable[..., Any]" has no attribute "func"
In mypy 0.710 due to I suppose commit e45f443, functools partial no longer corresponds with the docs, https://docs.python.org/3/library/functools.html#partial-objects
The docs state they're objects with func, args, and keywords, but they're no longer defined as such, thus cannot be annotated as partial, cannot access the documented attributes etc. For example, this resulted in no problem output with mypy 0.701:
...but now with 0.710 gives: