title: Binding a key press event on a Canvas widget
body: <p>I've binded a key to my canvas through:</p>
  
  <pre><code>self.canvas.bind("&lt;w&gt;", lambda event: self.canvas.focus_set())
  </code></pre>
  
  <p>Now, what do I do so when that key is pressed, it calls a specific action, like move an object up on the canvas?</p>