验证码

import random

def v_code(n):

code = ''
for i in range(n):

num=random.randint(0,9)
alf=chr(random.randint(65,90))
add=random.choice([num,alf])
code="".join([code,str(add)])
return code

n = int(input('输入你要生成验证码的位数:'))

print(v_code(n))