python装饰器写法

import time
def timeit(f):#f = myfunc(8)
    def wapper(x):
        start = time.time()
        f(x)
        ret = (time.time()-start)
        return ret
    return wapper
@timeit
def myfunc(x):
    time.sleep(x)

print(myfunc(8))

提问：wapper的x是怎么传进来的

看看这个，慢慢瞅，一步一步的理解
https://www.runoob.com/w3cnote/python-func-decorators.html