title: Python tkinter place put frame to the bottom
body: <p>I have this code</p>
  
  <pre><code>class App(object):
      def __init__(self):
          self.root = Tk()
          self.root.attributes('-zoomed', True)
  
          f1 = Frame(self.root, bd=1, bg="green", relief=SUNKEN)
          f2 = Frame(self.root, bd=1, bg="red", relief=SUNKEN)
          f3 = Frame(self.root, bd=1, bg="blue", relief=SUNKEN)
  
          split = 0.5
          f1.place(relx=0, relheight=1, relwidth=split)
          f2.place(relx=split, relheight=1, relwidth=1.0 - split)
          f3.place(height=50, width=self.screen_width)
  
  app = App()
  app.root.mainloop()
  </code></pre>
  
  <p>and the output is this
  <a href="https://i.stack.imgur.com/xpttO.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xpttO.png" alt="enter image description here"></a></p>
  
  <p>How to put the blue frame to the bottom of the window/screen?</p>