title: Tkinter: How to get a variable from a radiobutton, when using the grid geometry manager
body: <p>I'm new to Tkinter and I've been trying to <code>get</code> a variable from a radio button, when using the <code>grid</code> geometry manager.</p>
  
  <p>I know when you use <code>pack()</code>, you can use <code>variable.get()</code>, however I'm using <code>grid()</code> with a function within a class, with <code>self</code>.</p>
  
  <p>Could someone possibly show me an example, I've tried searching around, but no luck.</p>