added reduce ddp results on eval

Lightning-AI · Jun 30, 2020 · 9f1ed61 · 9f1ed61
1 parent aa6b42b
commit 9f1ed61
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/pytorch_lightning/trainer/evaluation_loop.py b/pytorch_lightning/trainer/evaluation_loop.py
@@ -353,6 +353,10 @@ def _evaluate(
         return eval_results
 
     def reduce_eval_ddp(self, eval_results):
+        # ignore bad inputs
+        if len(eval_results) or eval_results is None:
+            return
+
         for k, v in eval_results.items():
             if isinstance(v, dict):
                 self.reduce_eval_ddp(v)