Python登录恢复系统的问题

Question

这是一个用户可以在其中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")

文本文件中的格式是：username: (username) password: (password)，由于某种原因，当我输入帐户的用户名时，它会给出密码，但由于某种原因，它会在末尾显示Username not found，而我不知道如何解决这个问题。

Answer 1

在check = False之后，您必须添加break。这是因为您的循环将继续执行每一行，从而导致打印"No Username Found“。此外，因为check变成了False，所以我们可以在循环完成后检查这一点。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：

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