title: Calling a GWT RPC function from Python-mechanize
body: <p>I am getting a 500 : Internal error, the payload of the POST is <em>definately</em> right, one thing I noticed is the Content-Type is not "sticking" using <code>b.addheaders = [('Content-Type',"text-x-gwt-rpc")]</code> -- and I'm not sure why.</p>
  
  <p>Does anyone have quick/dirty code used to access a GWT RPC (i.e. emulate the GWT client) in Python using mechanize.  Browser?</p>