[Tkinter] Need help please properly putting tabs within a PanedWindow

[balenaucigasa]

import tkinter as tk
from tkinter import ttk

 
class MainApplication(tk.Frame):
    def __init__(self, parent, *args, **kwargs):
        tk.Frame.__init__(self, parent, *args, **kwargs)     
        self.parent = parent
 
        self.w1 = tk.PanedWindow()  
        self.w1.pack(fill = tk.BOTH, expand = 1)  
 
        self.left = tk.Entry(self.w1, bd = 5)  
        self.w1.add(self.left)  
 
        self.w2 = tk.PanedWindow(self.w1, orient = tk.VERTICAL)  
        self.w1.add(self.w2)  
 
# -------------------------------------------------------------------------
        self.TAB_CONTROL = ttk.Notebook(self.w2)
        self.TAB1 = ttk.Frame(self.TAB_CONTROL)
        self.TAB_CONTROL.add(self.TAB1, text='Tab 1')
        self.TAB2 = ttk.Frame(self.TAB_CONTROL)
        self.TAB_CONTROL.add(self.TAB2, text='Tab 2')
        self.TAB_CONTROL.pack(expand=1, fill="both")
        ttk.Frame(self.TAB1).grid(column=0, row=0, padx=10, pady=10)
        ttk.Label(self.TAB1, text="This is Tab 1", width=100).grid(column=0, row=0, padx=10, pady=10)        
        ttk.Frame(self.TAB2).grid(column=0, row=0, padx=10, pady=10)
        ttk.Label(self.TAB2, text="This is Tab 2", width=100).grid(column=0, row=0, padx=10, pady=10)
# ---------------------------------------------------------------------------
        self.e1 = tk.Entry(self.TAB1) 
        self.e1.grid() 
        self.e2 = tk.Entry(self.TAB2)  
        self.e2.grid()    

   
        #self.bottom = tk.Button(self.TAB1, text = "Add")
        #self.TAB1.add(self.bottom) 
 
if __name__ == "__main__":
    root = tk.Tk()
    MainApplication(root).pack()
    root.mainloop()

check it