random 模块

import random
print(random.random())     #0-1    只能是0的float
print(random.randint(1,5)) #1-4    int
print(random.randrange(1,3)) #1-2
print(random.choice([1,2,3,4,5,6])) #1-6
print(random.sample([1,2,3,4,5,6],2)) #1-6  随机获取2个值
print(random.uniform(1,3))  #1-2   可以是1-2的float

生成一个简单的5位验证码
def code():
    key = ""
    for i in range(5):
        num = random.randint(0,9)
        s = random.randint(65,122)    #A-Z a-z 中间91-96 是特符号
        if s in [91,92,93,94,95,96]:  #特殊符号 [ \\ ] ^ _ `
            s = random.randint(65, 90)
        s = chr(s)
        cod = random.choice([num,s])
        key += str(cod)
    print(key)

code()