Demonstrating that wrapping a decorating in a decorator and only using functools wraps on the inner decorator will still preserve metadata

gistfile1.txt

import time
from functools import wraps


def conditional_decorator(decorator, condition):
    """
    Used to conditionally decorate a function.
    """

    def wrapped_decorator(func):
        if not condition:
            return func
        return decorator(func)

    return wrapped_decorator


def timethis(func):
    """
    Decorator that reports the execution time.
    """

    @wraps(func)
    def wrapper(*args, **kwargs):
        start = time.time()
        result = func(*args, **kwargs)
        end = time.time()
        print(func.__name__, end - start)
        return result

    return wrapper


if __name__ == "__main__":

    @conditional_decorator(timethis, False)
    def countdown(n: int):
        """
        Counts down
        """
        while n > 0:
            n -= 1

    countdown(100000)
    print("Name:", countdown.__name__)
    print("Docstring:", repr(countdown.__doc__))
    print("Annotations:", countdown.__annotations__)