Event handling not working in Python 3.3.0?
<p>I tried running the chapter 15 programs that came with Object-Oriented Programming in Python by Goldwasser &amp; Letscher. Chapter 15 deals with event handling. For some reason, it won't work. It always crashes the program when I run it. My Python version is 3.3.0 and the specific code is the following:</p>

<pre><code>from cs1graphics import *

class BasicHandler(EventHandler):
  def handle(self, event):
    print( 'Event Triggered')

if __name__ == '__main__':
  simple = BasicHandler()
  paper = Canvas()
  paper.addHandler(simple)
</code></pre>

<p>When I run this program, it crashes Python immediately. Why's that?</p>

<p>EDIT: I downloaded Python 2.7.3 just to try this out in that version and it worked! So the problem is that there's something different in Python 3.3.0 that's causing this program to crash, but I haven't got a clue as to what is or should be different. Please help!</p>
