re-implement pandas-dev#27959

Author: jbrockmendel

pandas/core/ops/__init__.py

@@ -829,6 +829,13 @@ def wrapper(self, other):
             # Defer to DataFrame implementation; fail early
             return NotImplemented
 
+        elif should_extension_dispatch(self, other):
+            lvalues = extract_array(self, extract_numpy=True)
+            rvalues = extract_array(other, extract_numpy=True)
+            res_values = dispatch_to_extension_op(op, lvalues, rvalues)
+            result = self._constructor(res_values, index=self.index, name=res_name)
+            return finalizer(result)
+
         elif isinstance(other, (ABCSeries, ABCIndexClass)):
             is_other_int_dtype = is_integer_dtype(other.dtype)
             other = other if is_other_int_dtype else fill_bool(other)