code: def add_jobflow_steps(self, jobflow_id, steps):
          
          if type(steps) != types.ListType:
              steps = [steps]
          params = {}
          params['JobFlowId'] = jobflow_id
  
          # Step args
          step_args = [self._build_step_args(step) for step in steps]
          params.update(self._build_step_list(step_args))
  
          return self.get_object(
              'AddJobFlowSteps', params, RunJobFlowResponse, verb='POST')
docs: Adds steps to a jobflow
  
          :type jobflow_id: str
          :param jobflow_id: The job flow id
          :type steps: list(boto.emr.Step)
          :param steps: A list of steps to add to the job