title: How to collect values from checkbox in App Engine (python)?
body: <p>I found an <a href="https://stackoverflow.com/questions/3686773/cherrypy-saving-checkboxes-selection-to-variables">article for CherryPy</a> and some <a href="http://www.plus2net.com/javascript_tutorial/checkbox-array.php" rel="nofollow noreferrer">articles</a> on how to do this with Javascript, but is there a way to collect values from checkbox with <code>webapp</code>? Thanks.</p>
  
  <p>My naive attempt to append the <code>&lt;...name="article_tag"...&gt;</code> from the form to a list fails because it only writes the first checked item (in this case "sputnik"):</p>
  
  <pre><code>K = []
  for i in range(1,5):
      K.append(self.request.get("article_tag"))
      self.response.out.write(K)
      logging.info("""*****K %s""" % K) 
  </code></pre>
  
  <p>logging.info:</p>
  
  <pre><code>*****K [u'sputnik', u'sputnik', u'sputnik', u'sputnik']
  </code></pre>