Elastc search Dynamic Query

from elasticsearch_dsl import Search, Q, query as dslq
from app import es


targetings = [
            {
                "field": "country",
                "operator": "NOT IN",
                "value": "BD"
            },
            {
               "field": "offer_id",
               "operator": "=",
               "value": 1234
            },
            {
               "field": "platform",
               "operator": "=",
               "value": "iOS"
            }
        ]

s = Search(using=es, index="users")
s.extra(size=volume)
logical_operator_mappings = {
    'IN': 'must',
    'NOT IN': 'must_not',
    'AND': 'must',
    'OR': 'should',
    '=': 'filter'
}

q = Q()
for query in targetings:
    bool_q = Q('bool',
               **{logical_operator_mappings.get(
                   query.get('operator')
               ): Q('term', **{query["field"]: query["value"]})})
    q += bool_q
s = s.query(q)
s.query = dslq.FunctionScore(
    query=s.query,
    functions=[dslq.SF('random_score')],
    boost_mode="replace"
    )
res = s.execute()

subscribers = []
for row in res.hits:
    subscriber = row.to_dict()
    subscriber['_id'] = row.meta.id
    subscribers.append(subscriber)
return subscribers