Add missing update for BaseEstimator.preprocessing

Beat Buesser · Beat Buesser · commit 96957a10d164 · 2021-02-17T00:22:03.000Z
Signed-off-by: Beat Buesser &lt;beat.buesser@ie.ibm.com&gt;
diff --git a/art/estimators/estimator.py b/art/estimators/estimator.py
@@ -106,7 +106,7 @@ def _set_preprocessing_defences(self, preprocessing_defences):
         from art.defences.preprocessor.preprocessor import Preprocessor
 
         if preprocessing_defences is None:
-            pass
+            self.preprocessing = [self._preprocessing_argument]
         elif isinstance(preprocessing_defences, Preprocessor):
             self.preprocessing = [preprocessing_defences] + [self._preprocessing_argument]
         else:
