test_4 实现一个统计函数运行时间

1.datetime显示当前时间

import datetime
import time


def func():

    t = datetime.datetime.now()
    print t
    print "start **************"
    l=[]
    for i in range(1, 10):
        l.append(i)
        time.sleep(1)
    e = datetime.datetime.now()
    print e
    print (e - t).seconds


func()