从文件加载数据并在 tkinter 中使用它

Question

import pickle
from tkinter import *
import tkinter.messagebox 

Menu = Tk()

Menu.resizable(width=False, height = False)
Menu.state('zoomed')
Menu.title("Gold Farm")

Example = {"Test":"Initial"}

def database():
    with open ("accounts.pickle", "rb") as f:
        return pickle.load(f)

accounts = database()

usernameL = Label(text = "Username: ")
usernameL.place(y= 300, x = 550)
usernameB = Entry()
usernameB.place(y = 300,x = 620)

passwordL = Label(text = "Password: ")
passwordL.place(y= 330, x = 550)
passwordB = Entry(show = "*")
passwordB.place(y = 330,x = 620)

eUsername = usernameB.get()
ePassword = passwordB.get()

def confirm():
   for item in accounts:
        if eUsername in accounts and accounts[eUsername] == ePassword:
           print("Correct")
    else:
           print("False")


Login = Button(text="Login", command = confirm)
Login.place(y = 350, x = 620)

这是我完成以下内容的代码：

• 在 tkinter 窗口中询问用户用户名和密码
• 将他们输入的任何内容设置为电子用户名和电子密码
• 检查他们是否获得了正确的密码
• 请记住，“示例”字典是帐户文件中内容的示例

问题是当我输入正确的用户名和密码时，它仍然返回为假。 所以; 我想要一些关于我做错了什么或解决什么问题的帮助。

测试

def databaseNew():
with open("accounts.pickle", "wb") as f:
    Entry = Setup["me"] = "Tes"
    pickle.dump(Entry, f)

Answer 1

您的代码中没有任何输入，如果您调用confirm()，您将看到False，因为您正在迭代字典中的每个名称，for item in accounts 将其与空字符串进行比较。您也可以将您的功能简化为return accounts.get(eUsername) == ePassword 进行检查：

def confirm():
    print(accounts.get(eUsername) == ePassword)

您需要打包标签等。

import pickle

from tkinter import *


master = Tk()

usernameL = Label(master, text="Username: ")
usernameL.pack()
usernameB = Entry(master)
usernameB.pack()
passwordL = Label(master, text="Password: ")
passwordL.pack()
passwordB = Entry(master, show="*")
passwordB.pack()


master.resizable(width=False, height=False)
master.state('normal')
master.title("Gold Farm")

def database():
    with open("accounts.pickle", "rb") as f:
        return pickle.load(f)


accounts = database()

def confirm():
    u, p = usernameB.get(), passwordB.get()
    if accounts.get(u) == p:
        print(True)
        # do whatever here
    else:
        print(False)
        #  login is bad
        m  = messagebox.askretrycancel("Invalid input")
        if not m:
             master.quit()

Login = Button(master, text="Login", command=confirm)
Login.place(y=350, x=620)
Login.pack()

mainloop() 

这是一个粗略的示例，说明如何将新用户添加到现有的 dict 和 pickle，您可以填写缺少的逻辑并使用您计划的任何内容整理显示并验证输入：

import pickle

from tkinter import *

master = Tk()

usernameL = Label(master, text="Username: ")
usernameL.pack()
usernameB = Entry(master)
usernameB.pack()
passwordL = Label(master, text="Password: ")
passwordL.pack()
passwordB = Entry(master, show="*")
passwordB.pack()

master.resizable(width=False, height=False)
master.state('normal')
master.title("Gold Farm")


def database():
    with open("accounts.pickle", "rb") as f:
        return pickle.load(f)


accounts = database()

def new():
    u, p = usernameB.get(), passwordB.get()
    if u in accounts:
        m = messagebox.askretrycancel("Invalid","Username taken")
        if not m:
            master.quit()
    else:
        accounts[u] = p
        with open("accounts.pickle","wb") as f:
            pickle.dump(accounts, f)
        # do whatever


def confirm():
    u, p = usernameB.get(), passwordB.get()
    if accounts.get(u) == p:
        print(True)
        # do whatever here
    else:
        print(False)
        # do whatever when login is bad
        m  = messagebox.askretrycancel("Invalid input")
        if not m:
            master.quit()




Login = Button(master, text="Login", command=confirm)
Login.place(y=350, x=620)
Login.pack()
new_user = Button(master, text="Create acc", command=new)
new_user.pack()
mainloop()