我正在嘗試編寫一個包含多個頁面并且可以在單擊按鈕時切換到的代碼。它最初有效，但我的小部件沒有顯示，并且既沒有警告也沒有錯誤消息。其次，使用tk和tk.TK有什么區別？from tkinter import *import tkinter as tkclass moreTab(tk.Tk):    def __init__(self):        Tk.__init__(self)        self.geometry("1200x600")        container = Frame(self, bg='#c9e3c1')        container.pack(side = "top", fill = 'both', expand = True)        container.grid_rowconfigure(0, weight = 1)        container.grid_columnconfigure(0, weight = 1)        self.frames = {}        for q in (pageone, widget):            frame = q(container,self)            self.frames[q] = frame            frame.place(x= 0,y = 0)        self.raise_frame(pageone)    def raise_frame(self,cont):        frame = self.frames[cont]        frame.tkraise()class widget(Frame):    def __init__(self, master, control):        Frame.__init__(self, master)        lab = tk.Label(self, text="main page")        lab.place(x = 10, y = 40)        but = tk.Button(self, text='visit start page', command=lambda: control.raise_frame(pageone))        but.place(x = 10, y = 70)class pageone(Frame):    def __init__(self, master, control):        Frame.__init__(self,master)        lab = Label(self, text = 'welcome to Game Analysis')        lab.place(x = 10, y = 10)        but = Button(self, text = "Start", command  = lambda: control.raise_frame(widget))        but.place(x = 10, y = 20)app = moreTab()app.mainloop()