for RoundRobin return iterator instead of materialized list

aholmberg · aholmberg · commit 6056b36bc8b9 · 2015-07-22T15:08:42.000-05:00
Most of time, only first element will be consumed.
diff --git a/cassandra/policies.py b/cassandra/policies.py
@@ -173,7 +173,7 @@ def make_query_plan(self, working_keyspace=None, query=None):
         length = len(hosts)
         if length:
             pos %= length
-            return list(islice(cycle(hosts), pos, pos + length))
+            return islice(cycle(hosts), pos, pos + length)
         else:
             return []
 
