From 54aaeb25abfdccb6f18aa1c610c18c4b86880e6a Mon Sep 17 00:00:00 2001
From: Richard Liaw <rliaw@berkeley.edu>
Date: Sun, 1 Oct 2017 22:34:55 -0700
Subject: [PATCH] fixing (#1048)

---
 python/ray/rllib/common.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/python/ray/rllib/common.py b/python/ray/rllib/common.py
index 23b6e6da0..30a14b913 100644
--- a/python/ray/rllib/common.py
+++ b/python/ray/rllib/common.py
@@ -22,11 +22,13 @@ logger.setLevel(logging.INFO)
 
 class RLLibEncoder(json.JSONEncoder):
     def default(self, value):
-        if isinstance(value, np.float32) or isinstance(value, np.float64):
+        if np.issubdtype(value, float):
             if np.isnan(value):
                 return None
             else:
                 return float(value)
+        elif np.issubdtype(value, int):
+            return int(value)
 
 
 class RLLibLogger(object):