[Tkinter] problem with refresh UI in tkinter app

[Philbot]

Tried to tidy this up a little now and yes too many Mydata, that me thinking I can solve the issue with the classes lol.

I still load it at the beginning for it to get last session and the other place I use it is to reset the list when changes are made to then save to the pkl file

Still doesnt update my user page so Im just not getting this class mularky, its like trying to talk to a guy in another building and we have no wifi connection

import tkinter as tk                # python 3
from tkinter import font  as tkfont # python 3
import pickle
 
#on app open load previous pickle file data (this loads all my previous settings)
def loaddata():
    with open('sender2_ini.pkl', 'rb') as f:
        Mydata = pickle.load(f)
        return Mydata
 
Mydata = loaddata()

 
class MainApp(tk.Tk):
 
    def __init__(self, *args, **kwargs):
        tk.Tk.__init__(self, *args, **kwargs)
        self.title('Userpage')
 
        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 F in (Userpage, Setup):
            page_name = F.__name__
            frame = F(parent=container, controller=self)
            self.frames[page_name] = frame
 
            # put all of the pages in the same location; the one on the top of the stacking order
            # will be the one that is visible.
            frame.grid(row=0, column=0, sticky="nsew")
 
        self.show_frame("Userpage")
 
    def show_frame(self, page_name):
        '''Show a frame for the given page name'''
        frame = self.frames[page_name]
        frame.tkraise()
 
    def capture_asset(self):
        print("get the name of button pressed and store global variable for later use")
 
class Userpage(tk.Frame):
 
    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent, background="#b22222")
        self.controller = controller

        data1 = tk.StringVar(value=Mydata[0])
        data2 = tk.StringVar(value=Mydata[1])
 
        button1 = tk.Button(self, textvariable =data1, width=8)
        button1.grid(row=2, column=1, padx =5, pady =5)
        button2 = tk.Button(self, textvariable = data2, width=8)
        button2.grid(row=2, column=2, padx =5, pady =5)
        button3 = tk.Button(self, text="Setup", command=lambda: controller.show_frame("Setup"))
        button3.grid(row=6, column=3)
 
class Setup(tk.Frame):
 
    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent, width=500, height=500, background="bisque")
        self.controller = controller
 
        data1 = tk.Entry(self, textvariable = tk.StringVar(value=self.Mydata[0]))
        data1.grid(row=4, column=0)
        data2 = tk.Entry(self, textvariable = tk.StringVar(value=self.Mydata[1]))
        data2.grid(row=4, column=1)
 
        def setup_update():
            Mydata = [data1.get(), data2.get()]
            with open('sender2_ini.pkl', 'wb') as f:
                pickle.dump(Mydata, f)
 
        SaveButton = tk.Button(self, text='Save', width=25, command = setup_update)
        SaveButton.grid(row=5, column=0)
 
        senderbutton = tk.Button(self, text="Back to Userpage", command=lambda: controller.show_frame("Userpage"))
        senderbutton.grid(row=8, column=0)
 
if __name__ == "__main__":
    app = MainApp()
    app.mainloop()