fix: path types

facial_keypoint_detection.py

@@ -134,6 +134,10 @@ class FacialKeypointDetection(datasets.GeneratorBasedBuilder):
                                   how='left',
                                   on=['image_name'])
 
+        annotations_df[['image_path', 'mask_path'
+                       ]] = annotations_df[['image_path',
+                                            'mask_path']].astype('string')
+
         for row in annotations_df.sort_values(['image_name'
                                               ]).itertuples(index=False):
             yield idx, {