code: def _get_request_params(self, **kwargs):
          
          request_params = copy.deepcopy(self._shared_request_params)
          for key, value in iteritems(kwargs):
              if isinstance(value, dict) and key in request_params:
                  # ensure we don't lose dict values like headers or cookies
                  request_params[key].update(value)
              else:
                  request_params[key] = value
          return request_params
docs: Merge shared params and new params.