import time

from functools import wraps

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

@timethis

def countdown(n:int):

    '''Counts down'''

    while n > 0:

        n -= 1

countdown(100000)

print(countdown.__name__)

print(countdown.__doc__)

print(countdown.__annotations__)