Working with elasticsearch DSL and dynamic mappings

es_dsl_dynamic_mapping.py

from elasticsearch import Elasticsearch
cli = Elasticsearch() # may need to create

from elasticsearch_dsl import connections
connections.add_connection('default',cli.client)

import elasticsearch_dsl as dsl
class Study(dsl.Document):
    class Index:
        name = 'sra_study-zq'
# update Document from mappings already in elasticsearch

Study._index.load_mappings()

# find all docs matching 'cancer' in title
s = Study.search()
y = s.query('match',title='cancer')
y.execute()
results = y.execute()
for i in results[0:5]:
    print(i.title, i.accession)