Function composition with reverse operator overloading

compose_reverse.py

from typing import Any, Callable


a1 = Callable[[Any], Any]


class Compose:
    def __init__(self, f: a1) -> None:
        self.f = f

    def __mul__(self, g: a1) -> a1:
        return Compose(lambda x: self.f(g(x)))

    def __rmul__(self, g: a1) -> a1:
        return Compose(lambda x: g(self.f(x)))

    def __call__(self, *args: Any, **kwds: Any) -> Any:
        return self.f(*args, **kwds)