bugfix

src/data_helpers.py

@@ -185,7 +185,7 @@ class HasCategoryNode(dict):
         dict.__init__(self, self.d)
     
     def __eq__(self, other):
-        if not isinstance(other, HasCategoryNode):
+        if not isinstance(other, type(self)):
             return False
         if not len(self.d) == len(other.d):
             return False