Python elasticsearch.helpers.scan example
The documentation includes an example, although if I'm reading it right, helpers.scan by default sets search_type=scan, which was removed in ES 5.1. This causes the example code to fail with ES returning No search type for [scan]. We can amend this with preserve_order=True (I am however not sure about the performance implications here):
import elasticsearchimport elasticsearch.helperses = elasticsearch.Elasticsearch()results = elasticsearch.helpers.scan(es, index="test_index", doc_type="my_document", preserve_order=True, query={"query": {"match_all": {}}},)for item in results: print(item['_id'], item['_source']['name'])This helper returns an object which you can iterate to obtain the actual results from the query.
item is of form
{'_index': <str>, '_type': <str>, '_id': <str>, '_score': <float or None>, '_source': {'key': val}, 'sort': [<int>]}