code: def guide(i):
      
      url=cfg['ck_web_wiki']
  
      out('Opening web page '+url+' ...')
  
      import webbrowser
      webbrowser.open(url)
  
      return {'return':0}
docs: Input:  {}
  
      Output: {
                return       - return code =  0, if successful
                                           >  0, if error
                (error)      - error text if return > 0
              }