code: def index(obj, index=INDEX_NAME, doc_type=DOC_TYPE):
      
      doc = to_dict(obj)
  
      if doc is None:
          return
  
      id = doc.pop('id')
  
      return es_conn.index(index, doc_type, doc, id=id)
docs: Index the given document.
  
      https://elasticsearch-py.readthedocs.io/en/master/api.html#elasticsearch.Elasticsearch.index
      https://www.elastic.co/guide/en/elasticsearch/reference/current/docs-index_.html