python生成验证码

import randomdef Verifi_code():    code = []    for i in range(6):        if i == random.randint(1,5):            code.append(str(random.randint(1,5)))        else:            temp = random.randint(65,90)            code.append(chr(temp))    a = ''.join(code)    return ab = Verifi_code()print b