day21-python模块

1.时间

 import time

 #时间戳  #计算
 # print(time.time())    #1481321748.481654秒

 #结构化时间---当地时间
 # print(time.localtime(1531242343))
 # t=time.localtime()
 # print(t.tm_year)
 # print(t.tm_wday)
 # #-----#结构化时间---UTC
 # print(time.gmtime())

 #-----将结构化时间转换成时间戳

 # print(time.mktime(time.localtime()))
 #------将结构化时间转成字符串时间strftime
 # print(time.strftime("%Y---%m-%d %X",time.localtime()))
 #------将字符串时间转成结构化时间strptime
 # print(time.strptime("2016:12:24:17:50:36","%Y:%m:%d:%X"))

 # print(time.asctime())
 # print(time.ctime())

 import datetime
 print(datetime.datetime.now())

2.随机模块

 import random

 # ret=random.random()
 # ret=random.randint(1,100)
 # ret=random.randrange(1,3)
 # ret=random.choice([11,22,33,44,55])
 # ret=random.sample([11,22,33,44,55],2)
 # ret=random.uniform(1,4)
 #
 # print(ret)
 # ret=[1,2,3,4,5]
 # random.shuffle(ret)
 # print(ret)
 #
 def v_code():
     ret=""
     for i in range(5):
         num=random.randint(0,9)
         alf=chr(random.randint(65,122))
         s=str(random.choice([num,alf]))
         ret+=s
     return ret
 print(v_code())