From 4c0e2c3f58f18cccf44c7b3c69474302ecfa44e5 Mon Sep 17 00:00:00 2001
From: kary <ckarying@gmail.com>
Date: Wed, 5 Sep 2018 12:02:06 +0800
Subject: [PATCH] [rllib]multi agent judge bug (#2821)

* fix multi agent judge bug

* Update policy_evaluator.py
---
 python/ray/rllib/evaluation/policy_evaluator.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/python/ray/rllib/evaluation/policy_evaluator.py b/python/ray/rllib/evaluation/policy_evaluator.py
index 29a09e9e7..f0ce96d9d 100644
--- a/python/ray/rllib/evaluation/policy_evaluator.py
+++ b/python/ray/rllib/evaluation/policy_evaluator.py
@@ -228,7 +228,7 @@ class PolicyEvaluator(EvaluatorInterface):
             self.policy_map = self._build_policy_map(policy_dict,
                                                      policy_config)
 
-        self.multiagent = self.policy_map.keys() != set(DEFAULT_POLICY_ID)
+        self.multiagent = self.policy_map.keys() != {DEFAULT_POLICY_ID}
 
         self.filters = {
             policy_id: get_filter(observation_filter,