Fix tests run on enron (#1789)

* Fix tests run on enron

* Default language to englishe in num2words

Author: Hartorn

giskard/scanner/robustness/text_transformations.py

@@ -283,7 +283,11 @@ def _load_dictionaries(self):
 
     def make_perturbation(self, row):
         # Replace numbers with words
-        return self._regex.sub(lambda x: num2words(x.group(), lang=row["language__gsk__meta"]), row[self.column])
+        value = row[self.column]
+        if pd.isna(value):
+            return value
+        lang = row["language__gsk__meta"] if not pd.isna(row["language__gsk__meta"]) else "en"
+        return self._regex.sub(lambda x: num2words(x.group(), lang=lang), value)
 
 
 class TextReligionTransformation(TextLanguageBasedTransformation):

giskard/scanner/scanner.py

@@ -152,7 +152,7 @@ def _run_detectors(self, detectors, model, dataset, features, verbose=True, rais
             try:
                 detected_issues = detector.run(model, dataset, features=features)
             except Exception as err:
-                logger.error(f"Detector {detector.__class__.__name__} failed with error: {err}")
+                logger.exception(f"Detector {detector.__class__.__name__} failed with error: {err}")
                 errors.append((detector, err))
                 analytics.track(
                     "scan:run-detector:error",