decoratorsy

# decorator
from time import time

def performance(fn):
    def wrapper (*args, **kawrgs):
        t1 = time()
        result = fn(*args, **kawrgs)
        t2 = time()
        print(f'took {t2 - t1} s')
        return result
    return wrapper
@performance
def long_time():
    for i in range(10000000):
        i * 5
long_time()