"Caveat: timer won't work on methods as coded (see quiz solution)"
import time, sys

class timer:
    def __init__(self, func):
        self.func    = func
        self.alltime = 0
    def __call__(self, *args, **kargs):
        start   = time.perf_counter()
        result  = self.func(*args, **kargs)
        elapsed = time.perf_counter() - start
        self.alltime += elapsed
        print(f'{self.func.__name__}: {elapsed:.5f}, {self.alltime:.5f}')
        return result

@timer
def listcomp(N):
    return [x * 2 for x in range(N)]

@timer
def mapcall(N):
    return list(map((lambda x: x * 2), range(N)))

if __name__ == '__main__':
    for func in (listcomp, mapcall):
        result = func(5)                        # Time for this call, result
        func(50_000)
        func(500_000)
        func(1_000_000)
        print(result)
        print(f'allTime = {func.alltime}\n')    # Total time for all func calls

    print('**map/comp =', round(mapcall.alltime / listcomp.alltime, 3))