bulk update in elasticsearch

[pythonlearner1]

I am trying to update bulk document to elasticsearch

I am able to update this one by one document

following code works

  
elastic_output = Elasticsearch(output_master, http_auth=(elastic_user, elastic_password), port=9200)

 data_to_update = {
   "doc" : {
   "job": job_rec['job'],
   "site" : job_rec['site'],
   }
  }

elastic_output.update(index="my_index-2020",doc_type='_doc',id=data_to_update['doc']['job'],body=data_to_update)

how do I create bulk json and use bulk update?