ms

#7 24

import datetime
import time
# print(time.ctime())  #Wed Jul 24 21:58:39 2019
print(time.localtime())  # struct_time
print(time.time())     #1563976743.373683
print(datetime.date.today()) #2019-07-24
print(datetime.datetime.today()) #2019-07-24 22:04:07.553081
print(datetime.datetime.now()) #2019-07-24 22:04:07.553081

tm3 = datetime.datetime.strptime("2018-01-16 23:44:55", "%Y-%m-%d %H:%M:%S")
print(tm3.year)

时间戳 结构化 字符串   time.strftime("%Y-%m-%d %H:%M:%S",time.localtime(stamp))
字符串 结构化 时间戳   time.mktime(time.strptime('2019-9-1 9:9:1',"%Y-%m-%d %H:%M:%S"))

lst = [1,2,3,4,5]
import random
print(random.shuffle(lst))  #没有返回值 None  随机打乱

import threading
import time
flag = 0
class MyThread(threading.Thread):
    def __init__(self,name,counter):
        threading.Thread.__init__(self)
        self.name = name
        self.counter = counter

    def run(self):
        print('%s'%self.name,'开始')
        fn(self.name,self.counter ,5) #把要执行的代码写到run函数里面 线程在创建后会直接运行run函数
        print('%s' % self.name, '结束')

def fn(threadName, delay, counter):

        while counter: #5 4 3 2 1   延迟1/2秒
            if flag:
                threadName.exit()
            time.sleep(delay)
            print("%s: %s" % (threadName, time.ctime(time.time())))
            counter -= 1

t1 = MyThread('t1',1)
t2 = MyThread('t2',2)
t1.start()
t2.start()
t1.join()
t2.join()
print('线程结束')

# t1 开始
# t2 开始
# t1: Thu Jul 25 10:12:36 2019   1
# t1: Thu Jul 25 10:12:37 2019   2
# t2: Thu Jul 25 10:12:37 2019  -1-
# t1: Thu Jul 25 10:12:38 2019   3
# t1: Thu Jul 25 10:12:39 2019   4
# t2: Thu Jul 25 10:12:39 2019  -2-
# t1: Thu Jul 25 10:12:40 2019   5
# t1 结束
# t2: Thu Jul 25 10:12:41 2019  -3-
# t2: Thu Jul 25 10:12:43 2019  -4-
# t2: Thu Jul 25 10:12:45 2019  -5-
# t2 结束
# 线程结束
   t1延迟1秒  t2延迟2秒