title: Cannot Overriding Class HttpRequest Method dispatch in web module?
body: <p>Iam trying to override a method inside web=>http.py file in openerp project .
  I have write this code :</p>
  
  <pre><code>#in my_http.py 
  from openerp.addons import web
  class my_httprequest(web.http.HttpRequest):
      def dispatch(self, method):
          #some new code here ...
  </code></pre>
  
  <p>but will not overriding the original ? 
  where is the problem , why cannot override ?</p>