Make whatsnew show example

pandas-dev · TomAugspurger · Oct 29, 2018 · Mar 7, 2018 · Mar 7, 2018 · Mar 7, 2018
commit 5fd1ddf87189e9344e178cbea20a29c0165b223a
diff --git a/doc/source/whatsnew/v0.24.0.txt b/doc/source/whatsnew/v0.24.0.txt
@@ -162,6 +162,26 @@ array, but rather an ``ExtensionArray``:
 This is the same behavior as ``Series.values`` for categorical data. See
 :ref:`whatsnew_0240.api_breaking.interval_values` for more.
 
+.. _whatsnew_0240.enhancements.rename_axis:
+
+Renaming names in a MultiIndex
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+:func:`DataFrame.rename_axis` now supports ``index`` and ``columns`` arguments
+and :func:`Series.rename_axis` supports ``index`` argument (:issue:`19978`)
+
+This change allows a dictionary to be passed so that some of the names 
+of a ``MultiIndex`` can be changed.
+
+Example:
+
+.. ipython:: python
+
+    mi = pd.MultiIndex.from_product([list('AB'), list('CD'), list('EF')],
+                                    names=['AB', 'CD', 'EF'])
+    df = pd.DataFrame([i for i in range(len(mi))], index=mi, columns=['N'])
+    df
+    df.rename_axis(index={'CD': 'New'})

 .. _whatsnew_0240.enhancements.other:
 
@@ -181,8 +201,7 @@ Other Enhancements
 - :func:`read_html` copies cell data across ``colspan`` and ``rowspan``, and it treats all-``th`` table rows as headers if ``header`` kwarg is not given and there is no ``thead`` (:issue:`17054`)
 - :meth:`Series.nlargest`, :meth:`Series.nsmallest`, :meth:`DataFrame.nlargest`, and :meth:`DataFrame.nsmallest` now accept the value ``"all"`` for the ``keep`` argument. This keeps all ties for the nth largest/smallest value (:issue:`16818`)
 - :class:`IntervalIndex` has gained the :meth:`~IntervalIndex.set_closed` method to change the existing ``closed`` value (:issue:`21670`)
-- :func:`~DataFrame.to_csv` and :func:`~DataFrame.to_json` now support ``compression='infer'`` to infer compression based on filename (:issue:`15008`)
-- :func:`DataFrame.rename_axis` supports ``index`` and ``columns`` arguments and :func:`Series.rename_axis` supports ``index`` argument (:issue:`19978`)
+- :func:`~DataFrame.to_csv`, :func:`~Series.to_csv`, :func:`~DataFrame.to_json`, and :func:`~Series.to_json` now support ``compression='infer'`` to infer compression based on filename extension (:issue:`15008`).
   The default compression for ``to_csv``, ``to_json``, and ``to_pickle`` methods has been updated to ``'infer'`` (:issue:`22004`).
 - :func:`to_timedelta` now supports iso-formated timedelta strings (:issue:`21877`)
 - :class:`Series` and :class:`DataFrame` now support :class:`Iterable` in constructor (:issue:`2193`)