explicit defer in example implementation

Author: jorisvandenbossche

pandas/core/arrays/base.py

@@ -22,6 +22,7 @@
 from pandas.core.dtypes.cast import maybe_cast_to_extension_array
 from pandas.core.dtypes.common import is_array_like, is_list_like, pandas_dtype
 from pandas.core.dtypes.dtypes import ExtensionDtype
+from pandas.core.dtypes.generic import ABCDataFrame, ABCIndexClass, ABCSeries
 from pandas.core.dtypes.missing import isna
 
 from pandas.core import ops
@@ -1230,7 +1231,6 @@ def _create_method(cls, op, coerce_to_dtype=True, result_dtype=None):
         of the underlying elements of the ExtensionArray
         """
 
-        @ops.unpack_zerodim_and_defer(op.__name__)
         def _binop(self, other):
             def convert_values(param):
                 if isinstance(param, ExtensionArray) or is_list_like(param):
@@ -1239,6 +1239,10 @@ def convert_values(param):
                     ovalues = [param] * len(self)
                 return ovalues
 
+            if isinstance(other, (ABCSeries, ABCIndexClass, ABCDataFrame)):
+                # rely on pandas to unbox and dispatch to us
+                return NotImplemented
+
             lvalues = self
             rvalues = convert_values(other)