Python中的双密码身份验证

Question

我在学校里学到了一些python，我一直在尝试用密码认证创建一个简单的登录系统。

我希望它工作的方式：获取用户名和密码，请求密码进行身份验证，如果密码不正确，请再次询问，直到找到正确的密码

到目前为止这是我的代码：

#online auth

email = input('What is your email address?')
password = input('Enter a password')
passcheck = input('Please re-enter password for confimation')

while passcheck != password:
    input('Please re-enter password for confirmation')

else: print("A confirmation code has been emailed to you")

当我运行该程序时，它会正确地询问电子邮件和用户名，然后我收到确认问题。 如果我输入的密码与我在第一个地方输入的密码相同，则进入else语句。 如果我输入了错误的一个，它就会结束一个永不停止的重新输入密码的循环，即使我输入了正确的密码。

我知道while循环创建了一个无限循环，但我找不到任何好方法来结束它。

Answer 1

你可以做点什么

email = input('What is your email address?')
password_input = False
while not password_input or pass_check != password:
    password = input('Enter a password')
    pass_check = input('Please re-enter password for confimation')
    password_input = True
print("A confirmation code has been emailed to you")

Answer 2

刚刚在朋友的帮助下解决了：

#online auth

email = input('What is your email address?')
password = input('Enter a password')
passcheck = input('Please re-enter password for confimation')

while passcheck != password:
    passcheck = input('Please re-enter password for confirmation')
else: print("A confirmation code has been emailed to you")

Answer 3

结束循环的好方法是使用for或counter变量

for index in range(0,5):
    password = input('Enter a password')
    pass_check = input('Please re-enter password for confimation')
    if pass_check == password :
        print("A confirmation code has been emailed to you")
        index=65532
    else :
        print("The passwords do not match, try again.")

if index != 65532 :
    print("too many attempts, if you want to retry, please restart the program")

注意：65532不是特殊的，它只是超出范围，所以你退出for。