Add message to exception

histolab · Aug 23, 2021 · c557145 · c557145
1 parent ff115f6
commit c557145
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/histolab/filters/compositions.py b/src/histolab/filters/compositions.py
@@ -97,7 +97,7 @@ def tissue_mask_filters(self) -> imf.Compose:
             - `morphological_filters.BinaryFillHoles(structure=np.ones((5, 5)))
               <morphological_filters.html#src.histolab.filters.morphological_filters.BinaryFillHoles>`_
         """
-        raise NotImplementedError
+        raise NotImplementedError("Must be implemented by each subclass")
 
 
 class _SlideFiltersComposition(FiltersComposition):