bugfix for prev commit

src/maggotuba/models/trainers.py

@@ -70,7 +70,7 @@ class MaggotTrainer:
 
     def prepare_dataset(self, dataset, training=False):
         if training:
-            self.model.clf.config['training_dataset'] = self.model.path_for_config(dataset)
+            self.model.clf.config['training_dataset'] = self.model.path_for_config(dataset.path)
         try:
             dataset.batch_size
         except AttributeError: