GH refs

Author: jbrockmendel

doc/source/whatsnew/v3.0.0.rst

@@ -89,13 +89,13 @@ Other enhancements
 - Added support to read and write from and to Apache Iceberg tables with the new :func:`read_iceberg` and :meth:`DataFrame.to_iceberg` functions (:issue:`61383`)
 - Errors occurring during SQL I/O will now throw a generic :class:`.DatabaseError` instead of the raw Exception type from the underlying driver manager library (:issue:`60748`)
 - Implemented :meth:`Series.str.isascii` and :meth:`Series.str.isascii` (:issue:`59091`)
+- Improve the resulting dtypes in :meth:`DataFrame.where` and :meth:`DataFrame.mask` with :class:`ExtensionDtype` ``other`` (:issue:`62038`)
 - Improved deprecation message for offset aliases (:issue:`60820`)
 - Multiplying two :class:`DateOffset` objects will now raise a ``TypeError`` instead of a ``RecursionError`` (:issue:`59442`)
 - Restore support for reading Stata 104-format and enable reading 103-format dta files (:issue:`58554`)
 - Support passing a :class:`Iterable[Hashable]` input to :meth:`DataFrame.drop_duplicates` (:issue:`59237`)
 - Support reading Stata 102-format (Stata 1) dta files (:issue:`58978`)
 - Support reading Stata 110-format (Stata 7) dta files (:issue:`47176`)
-- Improve the resulting dtypes in :meth:`DataFrame.where` and :meth:`DataFrame.mask` with :class:`ExtensionDtype` ``other`` (:issue:`??`)
 .. ---------------------------------------------------------------------------
 .. _whatsnew_300.notable_bug_fixes:
 

pandas/core/generic.py

@@ -9798,7 +9798,7 @@ def _where(
 
                         other = np.broadcast_to(other, self.shape)
                     else:
-                        # GH#38729 avoid lossy casting or object-casting
+                        # GH#38729, GH#62038 avoid lossy casting or object-casting
                         if axis == 0:
                             res_cols = [
                                 self.iloc[:, i]._where(

pandas/tests/frame/indexing/test_where.py

@@ -698,7 +698,7 @@ def test_where_categorical_filtering(self):
         tm.assert_equal(result, expected)
 
     def test_where_ea_other(self):
-        # GH#38729/GH#38742
+        # GH#38729/GH#38742, GH#62038
         df = DataFrame({"A": [1, 2, 3], "B": [4, 5, 6]})
         arr = pd.array([7, pd.NA, 9])
         ser = Series(arr)