pull whatsnew from master

Author: peterpanmj

doc/source/whatsnew/v0.23.2.txt

@@ -1,82 +1,104 @@
 .. _whatsnew_0232:
 
-v0.23.2
--------
+v0.23.2 (July 5, 2018)
+----------------------
 
 This is a minor bug-fix release in the 0.23.x series and includes some small regression fixes
 and bug fixes. We recommend that all users upgrade to this version.
 
+.. note::
+
+   Pandas 0.23.2 is first pandas release that's compatible with
+   Python 3.7 (:issue:`20552`)
+
+
 .. contents:: What's new in v0.23.2
     :local:
     :backlinks: none
 
+.. _whatsnew_0232.enhancements:
+
+Logical Reductions over Entire DataFrame
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+:meth:`DataFrame.all` and :meth:`DataFrame.any` now accept ``axis=None`` to reduce over all axes to a scalar (:issue:`19976`)
+
+.. ipython:: python
+
+   df = pd.DataFrame({"A": [1, 2], "B": [True, False]})
+   df.all(axis=None)
+
+
+This also provides compatibility with NumPy 1.15, which now dispatches to ``DataFrame.all``.
+With NumPy 1.15 and pandas 0.23.1 or earlier, :func:`numpy.all` will no longer reduce over every axis:
+
+.. code-block:: python
+
+   >>> # NumPy 1.15, pandas 0.23.1
+   >>> np.any(pd.DataFrame({"A": [False], "B": [False]}))
+   A    False
+   B    False
+   dtype: bool
+
+With pandas 0.23.2, that will correctly return False, as it did with NumPy < 1.15.
+
+.. ipython:: python
+
+   np.any(pd.DataFrame({"A": [False], "B": [False]}))
+
 
 .. _whatsnew_0232.fixed_regressions:
 
 Fixed Regressions
 ~~~~~~~~~~~~~~~~~
 
--
--
-
-.. _whatsnew_0232.performance:
+- Fixed regression in :meth:`to_csv` when handling file-like object incorrectly (:issue:`21471`)
+- Re-allowed duplicate level names of a ``MultiIndex``. Accessing a level that has a duplicate name by name still raises an error (:issue:`19029`).
+- Bug in both :meth:`DataFrame.first_valid_index` and :meth:`Series.first_valid_index` raised for a row index having duplicate values (:issue:`21441`)
+- Fixed printing of DataFrames with hierarchical columns with long names (:issue:`21180`)
+- Fixed regression in :meth:`~DataFrame.reindex` and :meth:`~DataFrame.groupby`
+  with a MultiIndex or multiple keys that contains categorical datetime-like values (:issue:`21390`).
+- Fixed regression in unary negative operations with object dtype (:issue:`21380`)
+- Bug in :meth:`Timestamp.ceil` and :meth:`Timestamp.floor` when timestamp is a multiple of the rounding frequency (:issue:`21262`)
+- Fixed regression in :func:`to_clipboard` that defaulted to copying dataframes with space delimited instead of tab delimited (:issue:`21104`)
 
-Performance Improvements
-~~~~~~~~~~~~~~~~~~~~~~~~
 
--
--
+Build Changes
+~~~~~~~~~~~~~
 
-Documentation Changes
-~~~~~~~~~~~~~~~~~~~~~
-
--
--
+- The source and binary distributions no longer include test data files, resulting in smaller download sizes. Tests relying on these data files will be skipped when using ``pandas.test()``. (:issue:`19320`)
 
 .. _whatsnew_0232.bug_fixes:
 
 Bug Fixes
 ~~~~~~~~~
 
-**Groupby/Resample/Rolling**
-
--
--
-
 **Conversion**
 
-
--
--
+- Bug in constructing :class:`Index` with an iterator or generator (:issue:`21470`)
+- Bug in :meth:`Series.nlargest` for signed and unsigned integer dtypes when the minimum value is present (:issue:`21426`)
 
 **Indexing**
 
 - Bug in :meth:`Index.get_indexer_non_unique` with categorical key (:issue:`21448`)
--
+- Bug in comparison operations for :class:`MultiIndex` where error was raised on equality / inequality comparison involving a MultiIndex with ``nlevels == 1`` (:issue:`21149`)
+- Bug in :meth:`DataFrame.drop` behaviour is not consistent for unique and non-unique indexes (:issue:`21494`)
+- Bug in :func:`DataFrame.duplicated` with a large number of columns causing a 'maximum recursion depth exceeded' (:issue:`21524`).
 
 **I/O**
 
--
--
-
-**Plotting**
-
--
--
-
-**Reshaping**
-
--
--
+- Bug in :func:`read_csv` that caused it to incorrectly raise an error when ``nrows=0``, ``low_memory=True``, and ``index_col`` was not ``None`` (:issue:`21141`)
+- Bug in :func:`json_normalize` when formatting the ``record_prefix`` with integer columns (:issue:`21536`)
 
 **Categorical**
 
--
+- Bug in rendering :class:`Series` with ``Categorical`` dtype in rare conditions under Python 2.7 (:issue:`21002`)
 
 **Timezones**
+
 - Bug in :class:`Timestamp` and :class:`DatetimeIndex` where passing a :class:`Timestamp` localized after a DST transition would return a datetime before the DST transition (:issue:`20854`)
 - Bug in comparing :class:`DataFrame`s with tz-aware :class:`DatetimeIndex` columns with a DST transition that raised a ``KeyError`` (:issue:`19970`)
 
-**Other**
+**Timedelta**
 
--
+- Bug in :class:`Timedelta` where non-zero timedeltas shorter than 1 microsecond were considered False (:issue:`21484`)