surenkov

from abc import ABC, abstractmethod
from functools import reduce
from typing import Tuple, TypeVar, Union, Iterable, Mapping

TInstance = TypeVar("TInstance")

class AbstractFactory(Iterable[TInstance], ABC):
    pass

surenkov

from functools import partial


class MemoizedMethod:
    def __init__(self, func):
        self.func = func

    def __get__(self, obj, objtype=None):
        if obj is None:
            return self.func