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)
#0123456789
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)