diff --git a/learning_python3.md b/learning_python3.md
index 9871e9d..535dd5f 100644
--- a/learning_python3.md
+++ b/learning_python3.md
@@ -3192,83 +3192,71 @@ Note that the actual calculation is done inside the window itself.
 This is not a good idea because we should separate responsibilities into classes!
 
 ```python
-import wx
+from tkinter import *
+from tkinter import ttk
 import login_generator
 
 
-class MainWindow(wx.Dialog):
+class MainWindow(Frame):
     def __init__(self):
-        wx.Dialog.__init__(self, None, title="Login Generator")
-        self.full_window = wx.Panel(self)
-        self.full_window_sizer = wx.BoxSizer(wx.VERTICAL)
-        self.full_window_sizer.Add(self.create_top_panel(), 0, wx.EXPAND | wx.ALL, 20)
-        self.full_window_sizer.Add(self.create_bottom_panel(), 0, wx.EXPAND, 0)
-        self.full_window.SetSizer(self.full_window_sizer)
-        self.Show()
+        Frame.__init__(self)
+        self.full_window = PanedWindow(self,orient=VERTICAL)
+        self.full_window.pack(fill=BOTH,expand=True)
+        self.create_top_panel()
+        self.create_bottom_panel()
+        self.pack(fill=BOTH, expand=True)
 
     def create_bottom_panel(self):
-        bottom_panel = wx.Panel(self.full_window)
-        bottom_panel_sizer = wx.BoxSizer(wx.HORIZONTAL)
-        self.login_list = wx.ListCtrl(bottom_panel, style=wx.LC_REPORT)
-        self.login_list.Bind(wx.EVT_RIGHT_UP, self.show_popup)
-        self.login_list.InsertColumn(0, 'username', width=200)
-        self.login_list.InsertColumn(1, 'password', width=200)
-        bottom_panel_sizer.Add(self.login_list, 0, wx.EXPAND | wx.ALL, 200)
-        return bottom_panel
+        bottom_panel = PanedWindow(self.full_window, bg="green")
+        bottom_panel.pack(fill=BOTH, side=BOTTOM)
+        #List
+        self.login_list = ttk.Treeview(bottom_panel, columns=["username", "password"], show="headings", height=6)
+        self.login_list.pack()
+        self.login_list.heading("username", text="Username")
+        self.login_list.heading("password", text="Password")
+        self.login_list.bind("<ButtonRelease-1>", lambda e: self.show_popup())
 
     def create_top_panel(self):
-        top_panel = wx.Panel(self.full_window)
-        top_panel_sizer = wx.BoxSizer(wx.HORIZONTAL)
-        self.login_amount = wx.TextCtrl(top_panel)
-        self.login_complex = wx.CheckBox(top_panel, label="complex")
-        self.login_create = wx.Button(top_panel, label="Create")
-        self.login_create.Bind(wx.EVT_BUTTON, self.add_login)
-        top_panel_sizer.Add(self.login_amount, 1, wx.EXPAND|wx.ALL,0)
-        top_panel_sizer.Add(self.login_complex, 1, wx.EXPAND|wx.ALL,0)
-        top_panel_sizer.Add(self.login_create, 1, wx.EXPAND|wx.ALL,0)
-        top_panel.SetSizer(top_panel_sizer)
-        return top_panel
-    
-    def show_popup(self, event):
-        menu = wx.Menu()
-        menu.Append(1, "Copy selected items")
-        menu.Bind(wx.EVT_MENU, self.copy_items, id=1)
-        self.PopupMenu(menu)
 
-    def copy_items(self, event):
-        selected_items = []
-        for i in range(self.login_list.GetItemCount()):
-            if self.login_list.IsSelected(i):
-                username = selected_items.append(
-                        self.login_list.GetItem(i, 0).GetText()
-                        )
-                password = selected_items.append(
-                        self.login_list.GetItem(i, 1).GetText()
-                        )
-        clipdata = wx.TextDataObject()
-        clipdata.SetText("\n".join(selected_items))
-        wx.TheClipboard.Open()
-        wx.TheClipboard.SetData(clipdata)
-        wx.TheClipboard.Close()
+        top_panel = PanedWindow(self.full_window, bg="red")
+        self.login_amount = Text(top_panel, height=5, width=52)
+        self.login_amount.place(x=10,y=10)
+        self.complex = BooleanVar()
+        self.complex.set(False)
+        self.login_complex = Checkbutton(top_panel, text="complex",var=self.complex)
+        self.login_complex.place(x=10,y=100)
+        self.login_create = Button(top_panel, text="Create", command=lambda: self.add_login())
+        self.login_create.place(x=100,y=100)
+        top_panel.pack(expand=True, fill=BOTH)
 
-    def add_login(self, event):
-        amount = self.login_amount.GetValue()
-        complex = self.login_complex.GetValue()
+    def show_popup(self):
+        global root
+        menu = Menu()
+        menu.add_command(label="Copy selected items", command=lambda : self.copy_items())
+        root.config(menu=menu)
+
+    def copy_items(self):
+        global root
         try:
-            amount = int(amount)
-        except:
-            amount = 1
-        for i in range(0, amount):
-            username = login_generator.generate_username()
-            password = login_generator.generate_password(12, complex)
-            index = self.login_list.InsertItem(0, username)
-            self.login_list.SetItem(index, 1, password)
+            self.login_amount.insert(END, "Your username is {} and your password is {} \n".format(self.username,self.password))
 
+        except:
+            Msg = Toplevel(root)
+            l1 = Label(Msg, text="You have to take something")
+            l1.pack(fill=BOTH, expand=True)
+
+    def add_login(self):
+        self.username = login_generator.generate_username()
+        self.password = login_generator.generate_password(12,self.complex.get())
+        self.login_list.insert('', END,values=[self.username, self.password])
 
 if __name__ == "__main__":
-    app = wx.App()
+    root = Tk()
+    root.title("Login Generator")
+    root.geometry("500x300")
     win = MainWindow()
-    app.MainLoop()
+    root.mainloop()
+
 ```
 
 Now let's assume the generate username and password function take some calculation time.