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Аркадий Вартанян
Asked:2022-09-16 00:28:39 +0000 UTC2022-09-16 00:28:39 +0000 UTC

无法从集合中登录并将其与小部件中输入的值进行比较

  • 772

在 database_set 中有存储的用户对象。用户具有您需要从用户集中获取的字段（名字、姓氏、父名、登录名、密码）和登录字段，以便稍后我可以将保存的登录名与小部件中输入的登录名进行比较。

用户代码

class User():
    def __init__(self, firstname, lastname, patronymic, login, password):
        self.firstname = firstname
        self.lastname = lastname
        self.patronymic = patronymic
        self.login = login
        self.password = password

    def __str__(self):
        return f"User(firstname={self.firstname}, lastname={self.lastname}, patronymic={self.patronymic}, " \
               f"login={self.login}, password={self.password})"



from entity.user import User

database_set = set()
test_user_one = User("Arkadi", "Vartanyan", "Gevorkovich", "adik508", "ad123")
test_user_two = User("Ivan", "Ivanov", "Ivanovich", "ivan508", "ivan123")
test_user_three = User("Artem", "Artemov", "Artemovich", "artem508", "artem123")
test_user_four = User("Vasili", "Vasilev", "Vasilevich", "vasili508", "vasili123")


def save_database(user):
    database_set.add(user)
    print("Пользователь успешно сохранен!")


save_database(test_user_one)
save_database(test_user_two)
save_database(test_user_three)
save_database(test_user_four)
python

0 个回答

  1. Best Answer

    在这里使用字典而不是集合是有意义的。在这本字典中，键是登录名，值是用户对象本身。然后很容易in检查数据库中是否存在登录名，然后通过登录名自己获取用户，然后例如检查密码。

    如果用于set存储用户，那么通过in它您只能检查是否存在登录名（如果您覆盖方法__hash__和__eq__类User），并且必须通过枚举集合的元素来搜索对象本身。

    class User():
    def __init__(self, firstname, lastname, patronymic, login, password):
        self.firstname = firstname
        self.lastname = lastname
        self.patronymic = patronymic
        self.login = login
        self.password = password

    def __repr__(self):
        return f"User(firstname={self.firstname}, lastname={self.lastname}, patronymic={self.patronymic}, " \
               f"login={self.login}, password={self.password})"

# ---

# from entity.user import User

database = dict()
test_user_one = User("Arkadi", "Vartanyan", "Gevorkovich", "adik508", "ad123")
test_user_two = User("Ivan", "Ivanov", "Ivanovich", "ivan508", "ivan123")
test_user_three = User("Artem", "Artemov", "Artemovich", "artem508", "artem123")
test_user_four = User("Vasili", "Vasilev", "Vasilevich", "vasili508", "vasili123")


def add_user(user):
    database[user.login] = user
    print(f"Пользователь {user.login} успешно добавлен!")


add_user(test_user_one)
add_user(test_user_two)
add_user(test_user_three)
add_user(test_user_four)


def check_user(login, password):
    return login in database and database[login].password == password


# ---

import tkinter as tk
from tkinter import messagebox


root = tk.Tk()

entry_login = tk.Entry(root)
entry_login.pack()
entry_password = tk.Entry(root, show="*")
entry_password.pack()


def login():
    if check_user(entry_login.get(), entry_password.get()):
        messagebox.showinfo("Ok", "Success!")
    else:
        messagebox.showerror("Error", "Wrong login or password!")


tk.Button(root, text="Login", command=login).pack()

root.mainloop()
    • 1

  2. Python 中的集合（集合类型）仅对字符串或数字等简单类型有用。仅将用户登录名存储在您的集合中，而不是他们的对象。这将使使用in运算符更容易检查。

    def save_database(user):
    database_set.add(user.login)
    print("Пользователь успешно сохранен!")

    if LoginWidget.get() in database_set:
    ...
    • 0

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