我這樣做錯了嗎？

Question

我剛剛開始學習 Python 編程，我正在嘗試制作一個登錄系統，它使用終端並將數據存儲到 JSON 文件中並檢索它以登錄。

這是看起來導致問題的部分。

def login():
    login_username = input("Enter your username: ")
    login_password = input("Enter your pass: ")
    with open("data.json", 'r+') as data:
        if login_username == username and login_password == password:
            print("Successful Login")
        else:
            print("Please Try Again")
            login()

當我被要求輸入用戶並通過並且輸入與來自 JSON 的數據匹配時，它將循環並一次又一次地要求輸入用戶名和密碼。

我的整個代碼如下

import json

uname = ""
password =""


def register():
    uname = input("Enter a user to log in with: ")
    password = input("Enter a password: ")
    confirmed_pass = input("Enter the above password again")
    if password != confirmed_pass:
        print("Both the passwords does not match please re-enter a pass")
        password = input("Enter a password:")
        confirmed_pass = input("Enter the above password again")
    login_info = {
        "Username": uname,
        "Password": password
    }
    with open("data.json", "w") as write_file:
        json.dump(login_info, write_file, separators=(',', ':'))
    log = input("Would you like to login? (Y/N)")
    if log == 'Y' or log == "y":
        login()
    else:
        quit()




def login():
    login_uname = input("Enter your username: ")
    login_password = input("Enter your pass: ")
    with open("data.json", 'r') as data:
        if login_uname == uname and login_password == password:
            print("Successful Login")
        else:
            print("Please Try Again")
            login()


reg = input("Have you registered (Y/N) ?:  ")

if reg == 'Y' or reg == 'y':
    login()
elif reg == 'N' or reg == 'n':
    register()
else:
    print("Error!")

Answer 1

根據您的代碼，您應該首先使用json.loads將數據加載到 python 字典中：

with open("data.json", 'r') as data:
    login = json.loads(data.read())
    # then you can use it like this
    if login_username == login['Username'] and login_password == login['Password']:
        ... Rest of the code

只是您的登錄僅適用於最后注冊的用戶，您應該解決這個問題。