day21-python模块

1.时间

 1 import time
 2 
 3 #时间戳  #计算
 4 # print(time.time())    #1481321748.481654秒
 5 
 6 #结构化时间---当地时间
 7 # print(time.localtime(1531242343))
 8 # t=time.localtime()
 9 # print(t.tm_year)
10 # print(t.tm_wday)
11 # #-----#结构化时间---utc
12 # print(time.gmtime())
13 
14 #-----将结构化时间转换成时间戳
15 
16 # print(time.mktime(time.localtime()))
17 #------将结构化时间转成字符串时间strftime
18 # print(time.strftime("%y---%m-%d %x",time.localtime()))
19 #------将字符串时间转成结构化时间strptime
20 # print(time.strptime("2016:12:24:17:50:36","%y:%m:%d:%x"))
21 
22 # print(time.asctime())
23 # print(time.ctime())
24 
25 
26 import datetime
27 print(datetime.datetime.now())

2.随机模块

 1 import random
 2 
 3 # ret=random.random()
 4 # ret=random.randint(1,100)
 5 # ret=random.randrange(1,3)
 6 # ret=random.choice([11,22,33,44,55])
 7 # ret=random.sample([11,22,33,44,55],2)
 8 # ret=random.uniform(1,4)
 9 #
10 # print(ret)
11 # ret=[1,2,3,4,5]
12 # random.shuffle(ret)
13 # print(ret)
14 #
15 def v_code():
16     ret=""
17     for i in range(5):
18         num=random.randint(0,9)
19         alf=chr(random.randint(65,122))
20         s=str(random.choice([num,alf]))
21         ret+=s
22     return ret
23 print(v_code())