Python之路----------random模块

随机数模块：

import random

#随机小数
print(random.random())
#随机整数
print(random.randint(1,5))#他会打印5
#随机整数
print(random.randrange(1,5))#他永远不会打印5

利用random和string模块实现随机验证码：

 import string

 print(string.letters)
 #abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
 print(string.digits)
 #
 print(string.ascii_letters)
 #abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ

 #方式一
 str_source = string.ascii_letters+string.digits
 print(''.join(random.sample(str_source,4)))

 #方式二

 checkcode = ''
 for i in range(6):
     current = random.randrange(0,6)
     if current != i :
         temp = chr(random.randint(65, 90))
     else:
         temp = random.randint(0,9)

     checkcode += str(temp)

 print(checkcode)