Question

我正在使用tkinter并尝试创建一个框架库，而不是让我的程序每次都打开新窗口。我已经开始创建一个欢迎页面，我正在尝试显示我创建的仅为它提供此错误消息。 “ValueError：字典更新序列元素＃0的长度为1;需要2” 这是我的代码：

#!/usr/bin/python


from tkinter import *

import tkinter as tk


Large_Font = ("Verdana", 18)

class ATM(tk.Tk):
    def __init__(self, *args, **kwargs):
        tk.Tk.__init__(self, *args, **kwargs)
        container = tk.Frame(self)

        container.pack(side = "top", fill ="both", expand =True)

        container.grid_rowconfigure(0, weight=1)
        container.grid_columnconfigure(0, weight=1)

        self.frames = {}

        for i in (WelcomePage, Checking):

            frame = i(container, self)
            self.frames[i] = frame 
            frame.grid(row= 0, column = 0, sticky= "nsew")

        self.show_frame(WelcomePage)


    def show_frame(self, cont):
        frame = self.frames[cont]
        frame.tkraise()

class WelcomePage(tk.Frame): 
    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        self.controller = controller
        label = tk.Label(self, "Welcome to the ATM Simulator", font = Large_Font)
        label.pack(pady=100, padx=100)

        checkButton = Button(self, text = "Checking Account", 
                             command = lambda: controller.show_frame(Checking))
        checkButton.pack()


class Checking(tk.Frame):
    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent, controller)
        self.controller = controller
        label = tk.Label(self, "Welcome to the ATM Simulator", font = Large_Font)
        label.pack(pady=100, padx=100)

        homeButton = Button(self, text = "Back to Home Page", 
                             command = lambda: controller.show_frame(WelcomePage))   
        homeButton.pack()
app = ATM()
app.mainloop()

出现错误消息，因为我说明了

frame = i(container, self)

但是当我创建类我声明

class WelcomePage(tk.Frame):

我的WelcomePage类中的字典元素只有1个参数，但我需要两个。我尝试将self作为第二个参数，但这不起作用。这在Python 3.4中有效，但现在我使用的是Python 3.5，它给了我这个错误。我该如何解决这个问题？

Answer 1

class Checking(tk.Frame):
    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent, controller)

我不认为Frame的初始化程序可以接受那么多参数，除非controller是字典。尝试：

class Checking(tk.Frame):
    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)

您还应该使用text命名参数来指定标签的文本。

    label = tk.Label(self, text="Welcome to the ATM Simulator", font = Large_Font)

3 ValueError：字典更新序列元素＃0的长度为3; 2需要1

1 个答案: