Python functools.reduce-function example implementation

reduce.py

#!/usr/bin/env python3

from typing import Callable, Iterable, T

def my_reduce(func: Callable[[T, T], T], iterable: Iterable[T]) -> T:
    """
    Iterates over the given iterable and feeds the values
    through the given function until the iterable is
    exhausted, returning the final function value.
    """
    
    # This works on all iterables, unlike slicing or indexing
    iterator = iter(iterable)
    try:
        result = next(iterator)
    except StopIteration:
        raise TypeError("reduce() of empty sequence with no initial value")
    
    for value in iterator: # Handles StopIterations automatically
        result = func(result, value)
        
    return result