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v0.18.0.txt
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.. _whatsnew_0180:
v0.18.0 (January ??, 2016)
--------------------------
This is a major release from 0.17.1 and includes a small number of API changes, several new features,
enhancements, and performance improvements along with a large number of bug fixes. We recommend that all
users upgrade to this version.
Highlights include:
Check the :ref:`API Changes <whatsnew_0180.api>` and :ref:`deprecations <whatsnew_0180.deprecations>` before updating.
.. contents:: What's new in v0.18.0
:local:
:backlinks: none
.. _whatsnew_0180.enhancements:
New features
~~~~~~~~~~~~
.. _whatsnew_0180.enhancements.other:
Other enhancements
^^^^^^^^^^^^^^^^^^
- Handle truncated floats in SAS xport files (:issue:`11713`)
.. _whatsnew_0180.enhancements.rounding:
Datetimelike rounding
^^^^^^^^^^^^^^^^^^^^^
``DatetimeIndex``, ``Timestamp``, ``TimedeltaIndex``, ``Timedelta`` have gained the ``.round()`` method for datetimelike rounding. (:issue:`4314`)
Naive datetimes
.. ipython:: python
dr = pd.date_range('20130101 09:12:56.1234', periods=3)
dr
dr.round('s')
# Timestamp scalar
dr[0]
dr[0].round('10s')
Tz-aware are rounded in local times
.. ipython:: python
dr = dr.tz_localize('US/Eastern')
dr
dr.round('s')
Timedeltas
.. ipython:: python
t = timedelta_range('1 days 2 hr 13 min 45 us',periods=3,freq='d')
t
t.round('10min')
# Timedelta scalar
t[0]
t[0].round('2h')
In addition, ``.round()`` will be available thru the ``.dt`` accessor of ``Series``.
.. ipython:: python
s = Series(dr)
s
s.dt.round('D')
.. _whatsnew_0180.api:
.. _whatsnew_0180.api_breaking:
Backwards incompatible API changes
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Other API Changes
^^^^^^^^^^^^^^^^^
.. _whatsnew_0180.deprecations:
Deprecations
^^^^^^^^^^^^
.. _whatsnew_0180.prior_deprecations:
Removal of prior version deprecations/changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.. _whatsnew_0180.performance:
Performance Improvements
~~~~~~~~~~~~~~~~~~~~~~~~
- Improved performance of ``andrews_curves`` (:issue:`11534`)
.. _whatsnew_0180.bug_fixes:
Bug Fixes
~~~~~~~~~
- Bug in ``GroupBy.size`` when data-frame is empty. (:issue:`11699`)
- Bug in ``Timedelta.round`` with negative values (:issue:`11690`)
- Bug in ``.loc`` against ``CategoricalIndex`` may result in normal ``Index`` (:issue:`11586`)
- Bug groupby on tz-aware data where selection not returning ``Timestamp`` (:issue:`11616`)
- Bug in timezone info lost when broadcasting scalar datetime to ``DataFrame`` (:issue:`11682`)
- Bug in ``.loc`` result with duplicated key may have ``Index`` with incorrect dtype (:issue:`11497`)
- Bug in ``pd.rolling_median`` where memory allocation failed even with sufficient memory (:issue:`11696`)
- Bug in ``pd.read_clipboard`` and ``pd.to_clipboard`` functions not supporting Unicode (:issue:`9263`)