title: How to initialize empty list?
body: <p>Every time the input <code>s</code> comes from the form; the <code>list</code> is initialized again. How do I change the code to append each new <code>s</code> to the list?</p>
  
  <p>Thank you.</p>
  
  <pre><code>class Test(webapp.RequestHandler):
      def get(self):
  
          s = self.request.get('sentence')
          list = []                                   
          list.append(s)                      
          htmlcode1 = HTML.table(list)        
  </code></pre>