Python登录恢复系统出现问题

Question

这是用户可以恢复其用户名或密码的系统

account = input("What do you want to recover? Username or Password? ")
if account == ("Password") or account == ("password"):
    check = True
    while check:
        username = input("Enter your username for your account ")
        with open("accountfile.txt","r") as file:
            for line in file:
                text = line.strip().split()
                if username in text:
                    print(line)
                    check = False
                else:
                    print("Username not found")

文本文件中的格式为：username: (username) password: (password)由于某种原因，当我输入帐户的用户名时，会为此输入密码，但是由于某种原因，它会在末尾Username not found上说，但我没有不知道该如何解决。

Answer 1

在check = False之后，您必须添加break。这是因为循环不断进行，导致出现“未找到用户名”打印。另外，由于check变成了False，因此我们可以在循环完成后进行检查。代码为：

account = input("What do you want to recover? Username or Password? ")
if account == ("Password") or account == ("password"):
    check = True
    while check:
        username = input("Enter your username for your account ")
        with open("accountfile.txt","r") as file:
            for line in file:
                text = line.strip().split()
                if username in text:
                    print(line)
                    check = False
                    break
            if (check == True):
                print("Username not found")

结果：

输入：