typing.Callable and type hint of decorated method

[paivan1999]

Hello from Russia,
I've tried your multimethod library (version 1.10) recently, and 've found some problems.

1. typing.Callable is still not supported (I've seen that as you said, you've fixed it in 1.8, but problem remains in newer version)

my code:
class A:
@multimethod
def m(self, c: Callable[[int],int]) -> None:
print("helloCallable")

if name == 'main':
t:Callable[[int],int] = lambda arg:arg
A().m(t)

error code:
Traceback (most recent call last):
File "....py", line 33, in
A().m(t)
File "/home/.../.local/lib/python3.8/site-packages/multimethod/init.py", line 326, in call
func = self[tuple(func(arg) for func, arg in zip(self.type_checkers, args))]
File "/home/.../.local/lib/python3.8/site-packages/multimethod/init.py", line 320, in missing
raise DispatchError(msg, types, keys)
multimethod.DispatchError: ('m: 0 methods found', (<class 'main.A'>, <class 'collections.abc.Callable'>), [])

i'm using PyCharm, and find it more comfort to see all possible types of overloaded function when type it, like in multipledispatch, but in multimethod it just shows only one type with *args,**kwargs signature, while there are more than one overload with precise signature. Picture is added here:

I'll be grateful to see fixes of this problems

[paivan1999]

p.s.
If not these problems, i would definitely prefer multimethod to multipledispatch

[coady]

Your example works if t is defined as:

def t(arg: int) -> int:
        return arg

Whereas with t:Callable[[int],int] = lambda arg:arg, there is no way to know the function signature.

[paivan1999]

yup, I was not right at this point. Thank you.
But what with multimethod signature prompt? is multipledispatch better in this or I can fix it by myself?