elasticsearch-dsl-py: Can't paginate using elasticsearch_dsl

When I want to paginate through the search results, not iterate as the scan does from elasticsearch.helpers.

My current workaround is something like this

search = Search()
...
# construct your search query
...
result = search.params(search_type='scan', scroll='1m').execute()
scroll_id = result.scroll_id
# Now start using scroll_id to do the pagination,
# but I have to use Elasticsearch.scroll which returns dictionaries not a Result object
client = connections.get_connection()
while data_to_paginate:
  result = Response(client.scroll(scroll_id, scroll='1m'))

There probably should be a helper function that should abstract at least the following part

client = connections.get_connection()
result = Response(client.scroll(scroll_id, scroll='1m'))

Maybe even getting the scroll_id from the result. Basically the user probably shouldn’t be getting a client and manually constructing a Response object.

@HonzaKral what do you think? If we agree on the interface I could implement that since I am probably going to do that for my project.