Fixed __norm__ error in batch_generator

Author: lakshaykc

scripts/batch_generator.py

@@ -253,8 +253,9 @@ def get_colidxs_from_colnames(data, columns):
         if config.scale_field == '__norm__':
             self._normalizer_idx = None
         else:
-            self._normalizer_idx = np_array_index(colnames, config.scale_field)
-
+            #self._normalizer_idx = np_array_index(colnames, config.scale_field)
+            self._normalizer_idx = colnames.index(config.scale_field)
+            
         # Set up input-related attributes
         self._num_inputs = config.num_inputs = len(self._feature_names)