code: def fetch(self, fmt_p=None, fmt_j=None):
          
          url = self._prepare_query()
          data = self._execute_iex_query(url)
          return self._output_format(data, fmt_j=fmt_j, fmt_p=fmt_p)
docs: Fetches latest data
  
          Prepares the query URL based on self.params and executes the request
  
          Returns
          -------
          response: requests.response
              A response object