pscope.py

def logger(fn):
    start = time()
    fn()
    end = time()

    print("time taken was: ", end - start)
    return inner

def memoize(fn):
    memory = {}

    def fn2(*args):
        if args in memory:
            return memory[args]
        else:
            ret = fn(*args)
            memory[ret]
            return ret

    return fn2


newfn = memoize(calculationthattakesalongtimefactorial)

newfn(99)
newfn(99)