有人可以建议为什么第二个玩家没有被授权吗？

Question

UsernameFile = open("C:/Ishaan's Folder/Homework (Year 11)/Computing/NEA Programming Project/Usernames.txt", "r")
PasswordFile = open("C:/Ishaan's Folder/Homework (Year 11)/Computing/NEA Programming Project/Passwords.txt", "r")
ScoresFileIshaanFolder = open("C:/Ishaan's Folder/Homework (Year 11)/Computing/NEA Programming Project/Scores.txt", "a")
PlayerOneAuthorised = False
PlayerTwoAuthorised = False

#Read lines until we reach the place in the file that we want.
UsernameLine = UsernameFile.readline()
PasswordLine = PasswordFile.readline()

#To check whether the Player One is authorised
print("Player One Authentication.")
Username1 = str(input("Please enter your username: "))
print(Username1)

while UsernameLine != "":
    UsernameLine = UsernameFile.readline()
    if Username1 in str(UsernameLine):
        Password1 = input("""Username authorised
Please enter your password: """)
        while PasswordLine != "":
            PasswordLine = PasswordFile.readline()
            if Password1 in str(PasswordLine):
                print("Password Authorised")
                print(Username1, " is now authorised to play this game.")
                PlayerOneAuthorised = True
            else:
                NewPassword1 = input("""Password not authorised
Please re-enter your password: """)
            break
    else:
        newUsername1= input("""Username not authorised.
Please re-enter your username: """)
        Username1 = newUsername1
        if newUsername1 in str(UsernameLine):
            Password1 = input("""Username authorised
Please enter your password: """)
            while PasswordLine != "":
                PasswordLine = PasswordFile.readline()
                if Password1 in str(PasswordLine):
                    print("Password Authorised")
                    print(Username1, "is now authorised to play this game.")
                    PlayerOneAuthorised = True
                else:
                    NewPassword1 = input("""Password not authorised
Please re-enter your password: """)
                    if NewPassword1 in str(PasswordLine):
                        print("Password Authorised")
                        print(Username1, "is now authorised to play this game.")
                        PlayerOneAuthorised = True
                break
        else:
            print("""Username not authorised.
You are not allowed to play this game.""")
            input("Press enter to exit")
            exit()
    break

#To check whether Player Two is authorised
print("Player Two Authentication")
Username2 = str(input("Please enter your username: "))

while UsernameLine != "":
    UsernameLine = UsernameFile.readline()
    if Username2 in str(UsernameLine):
        Password2 = input("""Username authorised
Please enter your password: """)
        while PasswordLine != "":
            PasswordLine = PasswordFile.readline()
            if Password2 in str(PasswordLine):
                print("Password Authorised")
                print(Username2, "is now authorised to play this game.")
                PlayerTwoAuthorised = True
            else:
                NewPassword2 = input("""Password not authorised
Please re-enter your password: """)
            break
    else:
        newUsername2= input("""Username not authorised.
Please re-enter your username: """)
        Username2 = newUsername2

        if newUsername2 in str(UsernameLine):
            Password2 = input("""Username authorised
Please enter your password: """)
            while PasswordLine != "":
                PasswordLine = PasswordFile.readline()
                if Password2 in str(PasswordLine):
                    print("Password Authorised")
                    print(Username2, "is now authorised to play this game.")
                    PlayerTwoAuthorised = True
                else:
                    NewPassword2 = input("""Password not authorised
Please re-enter your password: """)
                    if NewPassword2 in str(PasswordLine):
                        print("Password Authorised")
                        print(Username2, "is now authorised to play this game.")
                        PlayerTwoAuthorised = True
                break
        else:
            print("""Username not authorised.
You are not allowed to play this game.""")
            input("Press enter to exit")
            exit()
    break

这是用户名文件：

Ishaan
Brandon
Harvey

这是密码文件：

Ishaan
Brandon
Harvey

当我输入“Ishaan”作为用户名和密码时，它正在被授权，但是当我输入“Brandon”或“Harvey”时，它说这些用户名不在文件中。

我认为这是读取文件的问题。 我已经尝试尽我所能。我的朋友告诉我添加一个函数而不是单独创建它，但我对函数没有那么自信。因此，如果您认为自己知道答案，请发表评论。

Answer 1

这个任务的代码太多了。您需要更好地构建您的编码 - 将其分开在任务中。您永远不会阅读所有用户名和密码。

您需要构建一个包含用户和密码的数据结构，因为您需要逐行读取这两个文件并“连接”这些行。

如果您需要检查登录，您只需使用您构建的结构并进行查找。 “需要登录代码”部分根本不需要处理文件读取。

创建密码和用户文件：

with open ("user.txt","w") as u, open("pass.txt","w") as p:
    for num in range(3):
        u.write(f"user{num+1}\n")
        p.write(f"pass{num+1}\n")

读入文件并存入字典：

# read all users/pw into a dictionary
users = {}
# open both files
with open("user.txt") as u, open("pass.txt") as p:
    # connect the lines using zip() with pairs the lines into tuples
    for (user,pw) in zip(u,p):
        # set the user/pw in your dictionary
        users[user.strip()] = pw.strip()

# don't print in your application     
print(users)

输出：

{'user1': 'pass1', 'user2': 'pass2', 'user3': 'pass3'}

---

使用字典的程序：

您可以轻松检查用户是否可以登录：

while True:
    user = input("Enter user name (empty user to quit): ")
    if not user:  
        break
    # never explain that this user is not present, ask for pw and
    # quite with a vague message that either user or pw wrong for
    # "more" security
    pw = input("Enter passphrase: ")

    # look if that key is in the dict and if so if the passphrase matches
    if users.get(user) == pw:
        print("Logged in.")
        break
    else:
        print("Invalid user.")
if not user:
    print("Quitting")
    exit(1)
else:
    print("Gooooooo")
    # logged in