Implement interface

pandas-dev · jreback · Mar 15, 2018 · Feb 23, 2018 · Feb 28, 2018 · Mar 6, 2018
commit ab4f01c0eec37baf9c2bb47014ee192484bd7200
diff --git a/pandas/core/arrays/categorical.py b/pandas/core/arrays/categorical.py
@@ -422,6 +422,10 @@ def _ndarray_values(self):
     def _constructor(self):
         return Categorical
 
+    @classmethod
+    def _constructor_from_sequence(cls, scalars):
+        return Categorical(scalars)
+
     def copy(self):
         """ Copy constructor. """
         return self._constructor(values=self._codes.copy(),