Python实现简单的随机生成验证码

[喜欢Java]

思路:导入random包,定义字符串str1,里面包含了字母以及数字.第一个循环用来计算还剩几次登录机会,第二个循环用来控制验证码的长度.用随机数来选择生成验证码的字母.

import random

username = "lxxx"
password = "123456"
for i in range(0, 4):
    str1 = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
    str2 = ""
    for j in range(4):
        str2 = str2 + str1[random.randint(0, len(str1) - 1)]
    print(f"验证码为:{str2}")
    str3 = input("请输入验证码:")
    if str3 == str2:
        Username = input("请输入用户名:")
        Password = input("请输入密码:")
        if Username == username and Password == password:
            print("登录成功!!!")
            break
        else:
            print("用户名或密码错误!!!")
            print(f"还有{i}次机会")
    else:
        print("验证码错误!!!")
        print(f"还有{i}次机会")
        continue