simplify RR policy, avoid errors with unpopulated instance

aholmberg · aholmberg · commit eaadf0db4467 · 2016-06-03T14:47:19.000-05:00
diff --git a/cassandra/policies.py b/cassandra/policies.py
@@ -150,12 +150,11 @@ class RoundRobinPolicy(LoadBalancingPolicy):
     This load balancing policy is used by default.
     """
     _live_hosts = frozenset(())
+    _position = 0
 
     def populate(self, cluster, hosts):
         self._live_hosts = frozenset(hosts)
-        if len(hosts) <= 1:
-            self._position = 0
-        else:
+        if len(hosts) > 1:
             self._position = randint(0, len(hosts) - 1)
 
     def distance(self, host):
