[RLlib] use Mapping instead of dict in summarize() to accommodate non…

…-dict grads/params (e.g. haiku's frozendict) (ray-project#8793)
LecJackS · Jun 11, 2020 · ea965d7 · ea965d7
1 parent 700d81f
commit ea965d7
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/rllib/utils/debug.py b/rllib/utils/debug.py
@@ -1,5 +1,6 @@
 import numpy as np
 import pprint
+from typing import Mapping
 
 from ray.rllib.policy.sample_batch import SampleBatch, MultiAgentBatch
 
@@ -17,7 +18,7 @@ def summarize(obj):
 
 
 def _summarize(obj):
-    if isinstance(obj, dict):
+    if isinstance(obj, Mapping):
         return {k: _summarize(v) for k, v in obj.items()}
     elif hasattr(obj, "_asdict"):
         return {