Astropy

Python 2.6. A deprecation warning will now be issued when using Astropy
in Python 2.6 (this warning can be disabled through the usual Python warning
filtering mechanisms). [3779]

===========================

Bug Fixes
---------

astropy.io.fits
^^^^^^^^^^^^^^^

- Fix use of quantize level parameter for ``CompImageHDU``. [6029]

- Prevent crash when a header contains non-ASCII (e.g. UTF-8) characters, to
allow fixing the problematic cards. [6084]

===========================

Bug Fixes
---------

astropy.convolution
^^^^^^^^^^^^^^^^^^^

- Fixed bug in ``discretize_integrate_2D`` in which x and y coordinates
where swapped. [5634]

astropy.coordinates
^^^^^^^^^^^^^^^^^^^

- Fixed a bug where ``get_transform`` could sometimes produce confusing errors
because of a typo in the input validation. [5645]

astropy.io.fits
^^^^^^^^^^^^^^^

- Guard against extremely unlikely problems in compressed images, which
could lead to memory unmapping errors. [5775]

astropy.io.votable
^^^^^^^^^^^^^^^^^^

- Fixed a bug where stdlib ``realloc()`` was used instead of
``PyMem_Realloc()`` [5696, 4739, 2100]

astropy.utils
^^^^^^^^^^^^^

- Fixed ImportError with NumPy < 1.7 and Python 3.x in
``_register_patched_dtype_reduce``. [5848]

===========================

Bug Fixes
---------

astropy.coordinates
^^^^^^^^^^^^^^^^^^^

- Initialising a SkyCoord from a list containing a single SkyCoord no longer removes
the distance from the coordinate. [5270]

- Fix errors in the implementation of the conversion to and from FK4 frames
without e-terms, which will have affected coordinates not on the unit
sphere (i.e., with distances). [4293]

- Fix bug where with cds units enabled it was no longer possible to initialize
an ``Angle``. [5483]

- Ensure that ``search_around_sky`` and ``search_around_3d`` return
integer type index arrays for empty (non) matches. [4877, 5083]

- Return an empty set of matches for ``search_around_sky`` and
``search_around_3d`` when one or both of the input coordinate
arrays is empty. [4875, 5083]

astropy.io.ascii
^^^^^^^^^^^^^^^^

- Fix a bug with empty value at end of tab-delimited table on Windows. [5370]

- Fix reading of big ASCII tables (more than 2Gb) with the fast reader.
[5319]

- Fix segfault with FastCsv and row with too many columns. [5534]

- Fix problem reading an AASTex format table that does not have ``\\``
at the end of the last table row. [5427]

astropy.io.fits
^^^^^^^^^^^^^^^

- Removed raising of AssertionError that could occur after closing or
deleting compressed image data. [4690, 4694, 4948]

- Fixed bug that caused an ignored exception to be displayed under certain
conditions when terminating a script after using fits.getdata(). [4977]

- Fixed usage of inplace operations that were raising an exception with
recent versions of Numpy due to implicit casting. [5250]

astropy.io.votable
^^^^^^^^^^^^^^^^^^

- Fixed bug of ``Resource.__repr__()`` having undefined attributes and
variables. [5382]

astropy.modeling
^^^^^^^^^^^^^^^^

- CompoundModel now correctly inherits _n_models, allowing the use of model sets [5358]

astropy.units
^^^^^^^^^^^^^

- Fixed bug in Ci definition. [5106]

- Non-ascii cds unit strings are now correctly represented using ``str`` also
on python2. This solves bugs in parsing coordinates involving strings too.
[5355]

- Ensure ``Quantity`` supports ``np.float_power``, which is new in numpy 1.12.
[5480]

astropy.utils
^^^^^^^^^^^^^

- Fixed AttributeError when calling ``utils.misc.signal_number_to_name`` with
Python3 [5430].

astropy.wcs
^^^^^^^^^^^

- Update the ``_naxis{x}`` attributes when calling ``WCS.slice``. [5411]


Other Changes and Additions
---------------------------

- The bundled ERFA was updated to version 1.3.0. This includes the
leap second planned for 2016 Dec 31. [5418]

===========================

Bug Fixes
---------

astropy.coordinates
^^^^^^^^^^^^^^^^^^^

- ``SkyCoord`` objects created before a new frame which has frame attributes
is created no longer raise ``AttributeError`` when the new attributes are
accessed [5021]

- Fix some errors in the implementation of aberration for ``get_sun``. [4979]

astropy.io.ascii
^^^^^^^^^^^^^^^^

- Fix problem reading a zero-length ECSV table with a bool type column. [5010]

astropy.io.fits
^^^^^^^^^^^^^^^

- Fix convenience functions (``getdata``, ``getheader``, ``append``,
``update``) to close files. [4786]

astropy.io.votable
^^^^^^^^^^^^^^^^^^

- The astropy.io.votable.validator.html module is updated to handle division
by zero when generating validation report. [4699]

astropy.table
^^^^^^^^^^^^^

- Fixed a bug where ``pprint()`` sometimes raises ``UnicodeDecodeError``
in Python 2. [4946]

- Fix bug when doing outer join on multi-dimensional columns. [4060]

- Fixed bug where Tables created from existing Table objects were not
inheriting the ``primary_key`` attribute. [4672]

astropy.tests
^^^^^^^^^^^^^

- Fix coverage reporting in Python 3. [4822]

astropy.units
^^^^^^^^^^^^^

- Duplicates between long and short names are now removed in the ``names``
and ``aliases`` properties of units. [5036]

astropy.utils
^^^^^^^^^^^^^

- The astropy.utils.xml.unescaper module now also unescapes ``'%2F'`` to
``'/'`` and ``'&&'`` to ``'&'`` in a given URL. [4699]

- Fix two problems related to the download cache: clear_download_cache() does
not work in Python 2.7 and downloading in Python 2.7 and then Python 3
can result in an exception. [4810]

astropy.vo
^^^^^^^^^^

- Cache option now properly caches both downloaded JSON database and XML VO
tables. [4699]

- The astropy.vo.validator.conf.conesearch_urls listing is updated to reflect
external changes to some VizieR Cone Search services. [4699]

- VOSDatabase decodes byte-string to UTF-8 instead of ASCII to avoid
UnicodeDecodeError for some rare cases. Fixed a Cone Search test that is
failing as a side-effect of 4699. [4757]

Other Changes and Additions
---------------------------

- Updated ``astropy.tests`` test runner code to work with Coverage v4.0 when
generating test coverage reports. [4176]

==========================

New Features
------------

astropy.nddata
^^^^^^^^^^^^^^

- ``NDArithmeticMixin`` check for matching WCS now works with
``astropy.wcs.WCS`` objects [4499, 4503]

Bug Fixes
---------

astropy.convolution
^^^^^^^^^^^^^^^^^^^

- Correct a bug in which ``psf_pad`` and ``fft_pad`` would be ignored [4366]

astropy.io.ascii
^^^^^^^^^^^^^^^^

- Fixed addition of new line characters after last row of data in
ascii.latex.AASTex. [4561]

- Fixed reading of Latex tables where the ``\tabular`` tag is in the first
line. [4595]

- Fix use of plain format strings with the fast writer. [4517]

- Fix bug writing space-delimited file when table has empty fields. [4417]

astropy.io.fits
^^^^^^^^^^^^^^^

- Fixed possible segfault during error handling in FITS tile
compression. [4489]

- Fixed crash on pickling of binary table columns with the 'X', 'P', or
'Q' format. [4514]

- Fixed memory / reference leak that could occur when copying a ``FITS_rec``
object (the ``.data`` for table HDUs). [520]

- Fixed a memory / reference leak in ``FITS_rec`` that occurred in a wide
range of cases, especially after writing FITS tables to a file, but in
other cases as well. [4539]

astropy.modeling
^^^^^^^^^^^^^^^^

- Fixed display of compound model expressions and components when printing
compound model instances. [4414, 4482]

astropy.stats
^^^^^^^^^^^^^

- the input for median_absolute_deviation will not be cast to plain numpy
arrays when given subclasses of numpy arrays
(like Quantity, numpy.ma.MaskedArray, etc.) [4658]

- Fixed incorrect results when using median_absolute_deviation with masked
arrays. [4658]

astropy.utils
^^^^^^^^^^^^^

- The ``zest.releaser`` hooks included in Astropy are now injected locally to
Astropy, rather than being global. [4650]

astropy.visualization
^^^^^^^^^^^^^^^^^^^^^

- Fixed ``fits2bitmap`` script to allow ext flag to contain extension
names or numbers. [4468]

- Fixed ``fits2bitmap`` default output filename generation for
compressed FITS files. [4468]