title: What exactly do these lines mean?
body: <p>after you import everything from Tkinter, you have to create a basic, blank window, and that's what this code is for, but what does each line mean? </p>
  
  <pre><code>class Window(Frame):
      def __init__(self, master=None):
          Frame.__init__(self, master)               
          self.master = master
  </code></pre>