Gist for codes used in the article 'Understanding Decorator (@) in Python'

understanding_decorator_in_python.py

import time
import typing


def add_two_integers(a: int, b: int) -> int:
    return a + b


def add_two_integers(a: int, b: int) -> int:
    start_time = time.time()
    result = a + b
    end_time = time.time()
    print("Operation have taken: ", end_time - start_time, " second")
    return result


def timing_decorator(func: typing.Callable):
    def wrapper(a: int, b: int):
        start_time = time.time()
        func_output = func(a, b)
        end_time = time.time()
        print("Operation have taken: ", end_time - start_time, " second")
        return func_output

    return wrapper


@timing_decorator
def add_two_integers(a: int, b: int) -> int:
    return a + b


result = add_two_integers(2, 3)
print(result)