def lookup(self, key=None, value=None, **pair):
        key, value = self._get_key_value(key,value,pair)
        lookup = self._get_method(vertex="lookup_vertex", edge="lookup_edge")
        resp = lookup(self.index_name,key,value)
        return initialize_elements(self.client, resp)

    #put_unique = update
Return all the elements in the index where key equals value.
dataset/ETHPy150Open espeed/bulbs/bulbs/neo4jserver/index.py/Index.lookup