Merge pull request pandas-dev#8755 from jorisvandenbossche/doc-fixes2

DOC: clean-up v0.15.1 whatsnew file

Author: jorisvandenbossche

doc/source/whatsnew/v0.15.1.txt

@@ -16,29 +16,32 @@ users upgrade to this version.
 API changes
 ~~~~~~~~~~~
 
-- Represent ``MultiIndex`` labels with a dtype that utilizes memory based on the level size. In prior versions, the memory usage was a constant 8 bytes per element in each level. In addition, in prior versions, the *reported* memory usage was incorrect as it didn't show the usage for the memory occupied by the underling data array. (:issue:`8456`)
+- ``s.dt.hour`` and other ``.dt`` accessors will now return ``np.nan`` for missing values (rather than previously -1), (:issue:`8689`)
 
   .. ipython:: python
 
-     dfi = DataFrame(1,index=pd.MultiIndex.from_product([['a'],range(1000)]),columns=['A'])
+     s = Series(date_range('20130101',periods=5,freq='D'))
+     s.iloc[2] = np.nan
+     s
 
   previous behavior:
 
   .. code-block:: python
 
-     # this was underreported in prior versions
-     In [1]: dfi.memory_usage(index=True)
-     Out[1]:
-     Index    8000 # took about 24008 bytes in < 0.15.1
-     A        8000
+     In [6]: s.dt.hour
+     Out[6]:
+     0    0
+     1    0
+     2   -1
+     3    0
+     4    0
      dtype: int64
 
-
   current behavior:
 
   .. ipython:: python
 
-     dfi.memory_usage(index=True)
+     s.dt.hour
 
 - ``groupby`` with ``as_index=False`` will not add erroneous extra columns to
   result (:issue:`8582`):
@@ -95,56 +98,7 @@ API changes
 
      gr.apply(sum)
 
-- ``concat`` permits a wider variety of iterables of pandas objects to be
-  passed as the first parameter (:issue:`8645`):
-
-  .. ipython:: python
-
-     from collections import deque
-     df1 = pd.DataFrame([1, 2, 3])
-     df2 = pd.DataFrame([4, 5, 6])
-
-  previous behavior:
-
-  .. code-block:: python
-
-     In [7]: pd.concat(deque((df1, df2)))
-     TypeError: first argument must be a list-like of pandas objects, you passed an object of type "deque"
-
-  current behavior:
-
-  .. ipython:: python
-
-     pd.concat(deque((df1, df2)))
-
-- ``s.dt.hour`` and other ``.dt`` accessors will now return ``np.nan`` for missing values (rather than previously -1), (:issue:`8689`)
-
-  .. ipython:: python
-
-     s = Series(date_range('20130101',periods=5,freq='D'))
-     s.iloc[2] = np.nan
-     s
-
-  previous behavior:
-
-  .. code-block:: python
-
-     In [6]: s.dt.hour
-     Out[6]:
-     0    0
-     1    0
-     2   -1
-     3    0
-     4    0
-     dtype: int64
-
-  current behavior:
-
-  .. ipython:: python
-
-     s.dt.hour
-
-- support for slicing with monotonic decreasing indexes, even if ``start`` or ``stop`` is
+- Support for slicing with monotonic decreasing indexes, even if ``start`` or ``stop`` is
   not found in the index (:issue:`7860`):
 
   .. ipython:: python
@@ -165,14 +119,14 @@ API changes
 
     s.loc[3.5:1.5]
 
-- added Index properties `is_monotonic_increasing` and `is_monotonic_decreasing` (:issue:`8680`).
 
+- ``io.data.Options`` has been fixed for a change in the format of the Yahoo Options page (:issue:`8612`), (:issue:`8741`)
 
-.. note:: io.data.Options has been fixed for a change in the format of the Yahoo Options page (:issue:`8612`), (:issue:`8741`)
+  .. note:: 
 
-  As a result of a change in Yahoo's option page layout, when an expiry date is given,
-  ``Options`` methods now return data for a single expiry date.  Previously, methods returned all
-  data for the selected month.
+    As a result of a change in Yahoo's option page layout, when an expiry date is given,
+    ``Options`` methods now return data for a single expiry date.  Previously, methods returned all
+    data for the selected month.
 
   The ``month`` and ``year`` parameters have been undeprecated and can be used to get all
   options data for a given month.
@@ -185,11 +139,11 @@ API changes
 
   New features:
 
-  The expiry parameter can now be a single date or a list-like object containing dates.
+  - The expiry parameter can now be a single date or a list-like object containing dates.
 
-  A new property ``expiry_dates`` was added, which returns all available expiry dates.
+  - A new property ``expiry_dates`` was added, which returns all available expiry dates.
 
-  current behavior:
+  Current behavior:
 
   .. ipython:: python
 
@@ -215,16 +169,78 @@ API changes
 Enhancements
 ~~~~~~~~~~~~
 
+- ``concat`` permits a wider variety of iterables of pandas objects to be
+  passed as the first parameter (:issue:`8645`):
+
+  .. ipython:: python
+
+     from collections import deque
+     df1 = pd.DataFrame([1, 2, 3])
+     df2 = pd.DataFrame([4, 5, 6])
+
+  previous behavior:
+
+  .. code-block:: python
+
+     In [7]: pd.concat(deque((df1, df2)))
+     TypeError: first argument must be a list-like of pandas objects, you passed an object of type "deque"
+
+  current behavior:
+
+  .. ipython:: python
+
+     pd.concat(deque((df1, df2)))
+
+- Represent ``MultiIndex`` labels with a dtype that utilizes memory based on the level size. In prior versions, the memory usage was a constant 8 bytes per element in each level. In addition, in prior versions, the *reported* memory usage was incorrect as it didn't show the usage for the memory occupied by the underling data array. (:issue:`8456`)
+
+  .. ipython:: python
+
+     dfi = DataFrame(1,index=pd.MultiIndex.from_product([['a'],range(1000)]),columns=['A'])
+
+  previous behavior:
+
+  .. code-block:: python
+
+     # this was underreported in prior versions
+     In [1]: dfi.memory_usage(index=True)
+     Out[1]:
+     Index    8000 # took about 24008 bytes in < 0.15.1
+     A        8000
+     dtype: int64
+
+
+  current behavior:
+
+  .. ipython:: python
+
+     dfi.memory_usage(index=True)
+
+- Added Index properties `is_monotonic_increasing` and `is_monotonic_decreasing` (:issue:`8680`).
+
 - Added option to select columns when importing Stata files (:issue:`7935`)
+
 - Qualify memory usage in ``DataFrame.info()`` by adding ``+`` if it is a lower bound (:issue:`8578`)
+
 - Raise errors in certain aggregation cases where an argument such as ``numeric_only`` is not handled (:issue:`8592`).
 
+- Added support for 3-character ISO and non-standard country codes in :func:`io.wb.download()` (:issue:`8482`)
+
+- :ref:`World Bank data requests <remote_data.wb>` now will warn/raise based
+  on an ``errors`` argument, as well as a list of hard-coded country codes and
+  the World Bank's JSON response.  In prior versions, the error messages
+  didn't look at the World Bank's JSON response.  Problem-inducing input were
+  simply dropped prior to the request. The issue was that many good countries
+  were cropped in the hard-coded approach.  All countries will work now, but
+  some bad countries will raise exceptions because some edge cases break the
+  entire response. (:issue:`8482`)
 
-- Added support for 3-character ISO and non-standard country codes in :func:``io.wb.download()`` (:issue:`8482`)
-- :ref:`World Bank data requests <remote_data.wb>` now will warn/raise based on an ``errors`` argument, as well as a list of hard-coded country codes and the World Bank's JSON response.  In prior versions, the error messages didn't look at the World Bank's JSON response.  Problem-inducing input were simply dropped prior to the request.  The issue was that many good countries were cropped in the hard-coded approach.  All countries will work now, but some bad countries will raise exceptions because some edge cases break the entire response. (:issue:`8482`)
 - Added option to ``Series.str.split()`` to return a ``DataFrame`` rather than a ``Series`` (:issue:`8428`)
+
 - Added option to ``df.info(null_counts=None|True|False)`` to override the default display options and force showing of the null-counts (:issue:`8701`)
 
+
+.. _whatsnew_0151.bug_fixes:
+
 Bug Fixes
 ~~~~~~~~~
 
@@ -243,48 +259,19 @@ Bug Fixes
 - Compat issue is ``DataFrame.dtypes`` when ``options.mode.use_inf_as_null`` is True (:issue:`8722`)
 - Bug in ``read_csv``, ``dialect`` parameter would not take a string (:issue: `8703`)
 - Bug in slicing a multi-index level with an empty-list (:issue:`8737`)
-
-
-
-
-
 - Bug in numeric index operations of add/sub with Float/Index Index with numpy arrays (:issue:`8608`)
 - Bug in setitem with empty indexer and unwanted coercion of dtypes (:issue:`8669`)
-
-
-
-
-
-
-
 - Bug in ix/loc block splitting on setitem (manifests with integer-like dtypes, e.g. datetime64) (:issue:`8607`)
-
-
 - Bug when doing label based indexing with integers not found in the index for
   non-unique but monotonic indexes (:issue:`8680`).
 - Bug when indexing a Float64Index with ``np.nan`` on numpy 1.7 (:issue:`8980`).
-
-
-
-
-
-
-
-
-
-
 - Fix ``shape`` attribute for ``MultiIndex`` (:issue:`8609`)
 - Bug in ``GroupBy`` where a name conflict between the grouper and columns
   would break ``groupby`` operations (:issue:`7115`, :issue:`8112`)
-
-
-
 - Fixed a bug where plotting a column ``y`` and specifying a label would mutate the index name of the original DataFrame (:issue:`8494`)
 - Fix regression in plotting of a DatetimeIndex directly with matplotlib (:issue:`8614`).
-
 - Bug in ``date_range`` where partially-specified dates would incorporate current date (:issue:`6961`)
-
 - Bug in Setting by indexer to a scalar value with a mixed-dtype `Panel4d` was failing (:issue:`8702`)
-
 - Bug where ``DataReader``'s would fail if one of the symbols passed was invalid.  Now returns data for valid symbols and np.nan for invalid (:issue:`8494`)
 - Bug in ``get_quote_yahoo`` that wouldn't allow non-float return values (:issue:`5229`).
+