minor...

modules/deeplearning/unet_l1b_l2.py

@@ -901,6 +901,11 @@ class UNET:
         train_label_files = glob.glob(directory+'label_train*.npy')
         valid_label_files = glob.glob(directory+'label_valid*.npy')
 
+        train_data_files.sort()
+        valid_data_files.sort()
+        train_label_files.sort()
+        valid_label_files.sort()
+
         self.setup_pipeline_files(train_data_files, train_label_files, valid_data_files, valid_label_files)
         self.build_model()
         self.build_training()