title: how to pass parameters from pythonoperator task to simplehttpoperator task in airflow dag?
body: <p>i want to trigger a simplehttpoperator,like this:
  airflow trigger_dag test_trigger --conf '{"name":"something"}'</p>
  
  <p>then i use a pythonoperator python_callable to accept parameters by using   kwargs['dag_run'].conf , and i want to pass the ['dag_run'].conf to simplehttpoperator, how can i  do it? anyone can help?</p>
  
  <pre><code>cc_ = {}
  
  
  def run_this_func(ds, **kwargs):
      cc_ = kwargs['dag_run'].conf
      logging.info(cc_)
      return cc_
  
  run_this = PythonOperator(
      task_id='run_this',
      provide_context=True,
      python_callable=run_this_func,
      dag=dag)
  
  http_task = SimpleHttpOperator(
      task_id='http_task',
      http_conn_id='test_http',
      method='POST',
      endpoint='/api/v1/function',
      data=cc_,
      headers={"Authorization": "Basic YWRtaW46MTIzNDU2", "Accept": "application/json, text/plain, */*"},
      response_check=lambda response: True if "10000" in response.content else False,
      dag=dag)
  
  http_task.set_upstream(run_this)
  </code></pre>