验证码生成

1. 纯数字验证码（4位）

import random
verificationcode = ''
for i in range(4):
    current = random.randint(0,9)
    verificationcode+=str(current)
print(verificationcode)

　　

2. 数字字母混合验证码（4位）

import random
verificationcode = ''
for i in range(4):
    current = random.randint(0,4)
    if current == i:                           #当循环与随机数相等则产生字母
        t_code = chr(random.randint(65,90))     #chr将数字转换为ascii码中的字母
    else:
        t_code = random.randint(0,9)
    verificationcode+=str(t_code)
print(verificationcode)