python functools lru_cache with class methods

lru_cache_for_class_decorator.py

# origin: https://stackoverflow.com/questions/33672412/python-functools-lru-cache-with-class-methods-release-object
import functools
import weakref

def memoized_method(*lru_args, **lru_kwargs):
    def decorator(func):
        @functools.wraps(func)
        def wrapped_func(self, *args, **kwargs):
            # We're storing the wrapped method inside the instance. If we had
            # a strong reference to self the instance would never die.
            self_weak = weakref.ref(self)
            @functools.wraps(func)
            @functools.lru_cache(*lru_args, **lru_kwargs)
            def cached_method(*args, **kwargs):
                return func(self_weak(), *args, **kwargs)
            setattr(self, func.__name__, cached_method)
            return cached_method(*args, **kwargs)
        return wrapped_func
    return decorator

Thank you for your code. I made some modifications based on this.
https://gist.github.com/Susensio/61841aa8186da1a06f54ba1e0b1a9b64
Added type hints and allow for decorator to be called without parenthesis.