title: how to set window size with frame?
body: <p>As title, i need to set window size with frame. i know with geometry. in the code, frame try to resize along widget size. i want it constant. so widget inside frame not involve with frame size.</p>
  <p>for ex, if i remove button widget in code. window size will follow frame size.</p>
  <pre><code>root = tkinter.Tk()
  
  s = ttk.Style()
  s.configure('Login.TFrame', background='red')
  
  login = ttk.Frame(root, style='Login.TFrame')
  login.config(width=640, height=360)
  
  // remove button widget makes window follow frame config size.
  ttk.Button(login, text=&quot;Login&quot;).pack()        
  
  login.pack(expand=True, fill=tkinter.BOTH)
  
  root.mainloop()
  </code></pre>