removed self.model refs

pytorch_lightning/utils/pt_callbacks.py

@@ -1,5 +1,6 @@
 import numpy as np
 import os, shutil
+from pytorch_lightning.pt_overrides.override_data_parallel import LightningDataParallel
 
 
 class Callback(object):
@@ -33,6 +34,8 @@ class Callback(object):
         self.params = params
 
     def set_model(self, model):
+        if type(model) is LightningDataParallel:
+            model = model.module
         self.model = model
 
     def on_epoch_begin(self, epoch, logs=None):