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v0.17.0.txt
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.. _whatsnew_0170:
v0.17.0 (July 31, 2015)
-----------------------
This is a major release from 0.16.2 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.
.. warning::
pandas >= 0.17.0 will no longer support compatibility with Python version 3.2 (:issue:`9118`)
Highlights include:
Check the :ref:`API Changes <whatsnew_0170.api>` and :ref:`deprecations <whatsnew_0170.deprecations>` before updating.
.. contents:: What's new in v0.17.0
:local:
:backlinks: none
.. _whatsnew_0170.enhancements:
New features
~~~~~~~~~~~~
.. _whatsnew_0170.enhancements.other:
Other enhancements
^^^^^^^^^^^^^^^^^^
.. _whatsnew_0170.api:
Backwards incompatible API changes
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. _whatsnew_0170.api_breaking:
.. _whatsnew_0170.api_breaking.other:
Other API Changes
^^^^^^^^^^^^^^^^^
- Enable writing Excel files in :ref:`memory <_io.excel_writing_buffer>` using StringIO/BytesIO (:issue:`7074`)
- Enable serialization of lists and dicts to strings in ExcelWriter (:issue:`8188`)
- Allow passing `kwargs` to the interpolation methods (:issue:`10378`).
.. _whatsnew_0170.deprecations:
Deprecations
^^^^^^^^^^^^
.. _whatsnew_0170.prior_deprecations:
Removal of prior version deprecations/changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.. _whatsnew_0170.performance:
Performance Improvements
~~~~~~~~~~~~~~~~~~~~~~~~
- Added vbench benchmarks for alternative ExcelWriter engines and reading Excel files (:issue:`7171`)
- 4x improvement in ``timedelta`` string parsing (:issue:`6755`)
- 8x improvement in ``timedelta64`` and ``datetime64`` ops (:issue:`6755`)
.. _whatsnew_0170.bug_fixes:
Bug Fixes
~~~~~~~~~
- Bug in ``DataFrame.apply`` when function returns categorical series. (:issue:`9573`)
- Bug in ``Index.drop_duplicates`` dropping name(s) (:issue:`10115`)
- Bug in ``pd.Series`` when setting a value on an empty ``Series`` whose index has a frequency. (:issue:`10193`)
- Bug in ``DataFrame.reset_index`` when index contains `NaT`. (:issue:`10388`)
- Bug in ``ExcelReader`` when worksheet is empty (:issue:`6403`)
- Bug in ``Table.select_column`` where name is not preserved (:issue:`10392`)
- Bug in ``DataFrame.interpolate`` with ``axis=1`` and ``inplace=True`` (:issue:`10395`)