title: How to tell if a key has been released in tkinter
body: <p>I am using this code to test whether a key has been pressed, but I also need a binding that is called when a key is released. If no such binding exists, I would settle for a bit of code that continuously checks if the key is still being pressed.</p>
  
  <pre><code>w.bind("&lt;Key&gt;",key)
  </code></pre>