astropy.io.votable- The format of the units in the VOTable file can be specified using the unit_format parameter. Note that units are still always written out using the CDS format, to ensure compatibility with the standard.
astropy.time- Add
datetimeformat (:class:`~astropy.time.core.TimeDatetime`) which allows converting to and from standard library ~datetime.datetime objects. - Add
plot_dateformat (:class:`~astropy.time.core.TimePlotDate``) which allows converting to and from the date representation used when plotting dates with matplotlib via the ~matplotlib.pyplot.plot_date function.
- Add
- Fixed an unrelated error message that could occur when trying to import astropy from a source checkout without having build the extension modules first. This issue was claimed to be fixed in v0.2.1, but the fix itself had a bug. [#971]
astropy.coordinates- Fixed encoding errors that could occur when formatting coordinate objects
in code using
from __future__ import unicode_literals. [#817] - Fixed a bug where the minus sign was dropped when string formatting dms coordinates with -0 degrees. [#875]
- Fixed encoding errors that could occur when formatting coordinate objects
in code using
astropy.io.fits- Properly supports the ZQUANTIZ keyword used to support quantization level--this includes working support for lossless GZIP compression of images.
- Fixed support for opening gzipped FITS files in a writeable mode. [#256]
- Added a more helpful exception message when trying to read invalid values
from a table when the required
TNULLnkeyword is missing. [#309] - More refactoring of the tile compression handling to work around a potential memory access violation that was particularly prevalent on Windows. [#507]
- Fixed an integer size mismatch in the compression module that could affect 32-bit systems. [#786]
- Fixed malformatting of the
TFORMnkeywords when writing compressed image tables (they ommitted the max array length parameter from the variable-length array format). - Fixed a crash that could occur when writing a table containing multi- dimensional array columns from an existing file into a new file.
- Fixed a bug in fitsdiff that reported two header keywords contaning NaN as having different values.
astropy.io.votable- Fixed links to the
astropy.io.votabledocumentation in the VOTable validator output. [#806] - When reading VOTables containing integers that are out of range for their column type, display a warning rather than raising an exception. [#825]
- Changed the default string format for floating point values for better round-tripping. [#856]
- Fixed opening VOTables through the
Table.read()interface for tables that have no names. [#927] - Fixed creation of VOTables from an Astropy table that does not have a data mask. [#928]
- Minor documentation fixes. [#932]
- Fixed links to the
astropy.nddata.convolution- Added better handling of
infvalues to theconvolve_fftfamily of functions. [#893]
- Added better handling of
astropy.table- Fixed silent failure to assign values to a row on multiple columns. [#764]
- Fixed various buggy behavior when viewing a table after sorting by one of its columns. [#829]
- Fixed using
numpy.where()with table indexing. [#838] - Fixed a bug where opening a remote table with
Table.read()could cause the entire table to be downloaded twice. [#845] - Fixed a bug where
MaskedColumnno longer worked if the column being masked is renamed. [#916]
astropy.units- Added missing capability for array
Quantitys to be initializable by a list ofQuantitys. [#835] - Fixed the definition of year and lightyear to be in terms of Julian year per the IAU definition. [#861]
- "degree" was removed from the list of SI base units. [#863]
- Added missing capability for array
astropy.wcs- Fixed
TypeErrorwhen callingWCS.to_header_string(). [#822]
- Fixed
- Misc
- Fixed a minor issue when installing with
./setup.py developon a fresh git clone. This is likely only of interest to developers on Astropy. [#725] - Fixes a crash with
ImportError: No module named 'astropy.version'when running setup.py from a source checkout for the first time on OSX with Python 3.3. [#820] - Fixed an installation issue where running
./setup.py installor when installing with pip the.astropydirectory gets created in the home directory of the user running the command. The user's.astropydirectory should only be created when they use astropy, not when they install it. [#867] - Fixed an exception when creating a
ProgressBarwith a "total" of 0. [#752] - Added better documentation of behavior that can occur when trying to import the astropy package from within a source checkout without first building the extension modules. [#795, #864]
- Added link to the installation instructions in the README. [#797]
- Catches segfaults in xmllint which can occur sometimes and is otherwise out of our control. [#803]
- Minor changes to the documentation template. [#805]
- Fixed a minor exception handling bug in
download_file(). [#808] - Added cleanup of any temporary files if an error occurs in
download_file(). [#857] - Filesystem free space is checked for before attempting to download a file
with
download_file(). [#858] - Fixed package data locating to work across symlinks--required to work with some OS packaging layouts. [#827]
- Fixed a bug when building Cython extensions where hidden files containing
.pyxextensions could cause the build to crash. This can be an issue with software and filesystems that autogenerate hidden files. [#834] - Fixed bug that could cause a "script" called README.rst to be installed in a bin directory. [#852]
- Fixed some miscellaneous and mostly rare reference leaks caught by cpychecker. [#914]
- Fixed a minor issue when installing with
- Added logo and branding for Windows binary installers. [#741]
- Upgraded included version libexpat to 2.1.0. [#781]
- ~25% performance improvement in unit composition/decomposition. [#836]
- Added previously missing LaTeX formatting for
L_sunandR_sun. [#841] ConfigurationItems now have a more useful and informative__repr__and improved documentation for how to use them. [#855]- Added a friendlier error message when trying to import astropy from a source checkout without first building the extension modules inplace. [#864]
py.testnow outputs more system information for help in debugging issues from users. [#869]- Added unit definitions "mas" and "uas" for "milliarcsecond" and "microarcsecond" respectively. [#892]
This is a brief overview of the new features included in Astropy 0.2--please see the "What's New" section of the documentation for more details.
astropy.coordinates- This new subpackage contains a representation of celestial coordinates, and provides a wide range of related functionality. While fully-functional, it is a work in progress and parts of the API may change in subsequent releases.
astropy.cosmology- Update to include cosmologies with variable dark energy equations of state. (This introduces some API incompatibilities with the older Cosmology objects).
- Added parameters for relativistic species (photons, neutrinos) to the astropy.cosmology classes. The current treatment assumes that neutrinos are massless. [#365]
- Add a WMAP9 object using the 9-year WMAP parameters from Hinshaw et al. Once this paper is accepted, this should be made the default, but for now WMAP7 remains the default. [#629]
astropy.tableI/O infrastructure for custom readers/writers implemented. [#305]- Added support for reading/writing HDF5 files [#461]
- Added support for masked tables with missing or invalid data [#451]
New
astropy.timesub-package. [#332]New
astropy.unitssub-package that includes a class for units (astropy.units.Unit) and scalar quantities that have units (astropy.units.Quantity). [#370, #445]This has the following effects on other sub-packages:
- In
astropy.wcs, thewcs.cunitlist now takes and returnsastropy.units.Unitobjects. [#379] - In
astropy.nddata, units are now stored asastropy.units.Unitobjects. [#382] - In
astropy.table, units on columns are now stored asastropy.units.Unitobjects. [#380] - In
astropy.constants, constants are now stored asastropy.units.Quantityobjects. [#529]
- In
astropy.io.ascii- Improved integration with the
astropy.tableTable class so that table and column metadata (e.g. keywords, units, description, formatting) are directly available in the output table object. The CDS, DAOphot, and IPAC format readers now provide this type of integrated metadata. - Changed to using astropy.table masked tables instead of NumPy masked arrays for tables with missing values.
- Added SExtractor table reader to
astropy.io.ascii[#420] - Removed the Memory reader class which was used to convert data input
passed to the
writefunction into an internal table. Insteadwriteinstantiates an astropy Table object using the data input towrite. - Removed the NumpyOutputter as the output of reading a table is now
always a
Tableobject. - Removed the option of supplying a function as a column output formatter.
- Added a new
strip_whitespacekeyword argument to thewritefunction. This controls whether whitespace is stripped from the left and right sides of table elements before writing. Default is True. - Fixed a bug in reading IPAC tables with null values.
- Improved integration with the
Generalized I/O infrastructure so that
astropy.nddatacan also have custom readers/writers [#659]astropy.wcs- From updating the the underlying wcslib 4.16:
- When astropy.wcs.WCS constructs a default coordinate representation it will give it the special name "DEFAULTS", and will not report "Found one coordinate representation".
- From updating the the underlying wcslib 4.16:
- A configuration file with all options set to their defaults is now generated
when astropy is installed. This file will be pulled in as the users'
astropy configuration file the first time they
import astropy. [#498] - Astropy doc themes moved into
astropy.sphinxto allow affiliated packages to access them. - Added expanded documentation for the
astropy.cosmologysub-package. [#272] - Added option to disable building of "legacy" packages (pyfits, vo, etc.).
- The value of the astronomical unit (au) has been updated to that adopted by IAU 2012 Resolution B2, and the values of the pc and kpc constants have been updated to reflect this. [#368]
- Added links to the documentation pages to directly edit the documentation on GitHub. [#347]
- Several updates merged from
pywcsintoastropy.wcs[#384]:- Improved the reading of distortion images.
- Added a new option to choose whether or not to write SIP coefficients.
- Uses the
relaxoption by default so that non-standard keywords are allowed. [#585]
- Added HTML representation of tables in IPython notebook [#409]
- Rewrote CFITSIO-based backend for handling tile compression of FITS files. It now uses a standard CFITSIO instead of heavily modified pieces of CFITSIO as before. Astropy ships with its own copy of CFITSIO v3.30, but system packagers may choose instead to strip this out in favor of a system-installed version of CFITSIO. This corresponds to PyFITS ticket 169. [#318]
- Moved astropy.config.data to astropy.utils.data and re-factored the I/O routines to separate out the generic I/O code that can be used to open any file or resource from the code used to access Astropy-related data. The 'core' I/O routine is now get_readable_fileobj, which can be used to access any local as well as remote data, supports caching, and can decompress gzip and bzip2 files on-the-fly. [#425]
- Added a classmethod to astropy.coordinates.coordsystems.SphericalCoordinatesBase that performs a name resolve query using Sesame to retrieve coordinates for the requested object. This works for any subclass of SphericalCoordinatesBase, but requires an internet connection. [#556]
astropy.nddata.convolutionremoved requirement of PyFFTW3; uses Numpy's FFT by default instead with the added ability to specify an FFT implementation to use. [#660]
astropy.io.ascii- Fixed crash when pprinting a row with INDEF values. [#511]
- Fixed failure when reading DAOphot files with empty keyword values [#666].
astropy.io.fits- Improved handling of scaled images and pseudo-unsigned integer images in
compressed image HDUs. They now work more transparently like normal image
HDUs with support for the
do_not_scale_image_dataanduintoptions, as well asscale_backandsave_backup. The.scale()method works better too. Corresponds to PyFITS ticket 88. - Permits non-string values for the EXTNAME keyword when reading in a file, rather than throwing an exception due to the malformatting. Added verification for the format of the EXTNAME keyword when writing. Corresponds to PyFITS ticket 96.
- Added support for EXTNAME and EXTVER in PRIMARY HDUs. That is, if EXTNAME
is specified in the header, it will also be reflected in the
.nameattribute and infits.info(). These keywords used to be verboten in PRIMARY HDUs, but the latest version of the FITS standard allows them. Corresponds to PyFITS ticket 151. - HCOMPRESS can again be used to compress data cubes (and higher-dimensional arrays) so long as the tile size is effectively 2-dimensional. In fact, compatible tile sizes will automatically be used even if they're not explicitly specified. Corresponds to PyFITS ticket 171.
- Fixed a bug that could cause a deadlock in the filesystem on OSX when reading the data from certain types of FITS files. This only occurred when used in conjunction with Numpy 1.7. [#369]
- Added support for the optional
endcardparameter in theHeader.fromtextfile()andHeader.totextfile()methods. Althoughendcard=Falsewas a reasonable default assumption, there are still text dumps of FITS headers that include the END card, so this should have been more flexible. Corresponds to PyFITS ticket 176. - Fixed a crash when running fitsdiff on two empty (that is, zero row) tables. Corresponds to PyFITS ticket 178.
- Fixed an issue where opening a FITS file containing a random group HDU in update mode could result in an unnecessary rewriting of the file even if no changes were made. This corresponds to PyFITS ticket 179.
- Fixed a crash when generating diff reports from diffs using the
ignore_commentsoptions. Corresponds to PyFITS ticket 181. - Fixed some bugs with WCS Paper IV record-valued keyword cards:
- Cards that looked kind of like RVKCs but were not intended to be were over-permissively treated as such--commentary keywords like COMMENT and HISTORY were particularly affected. Corresponds to PyFITS ticket 183.
- Looking up a card in a header by its standard FITS keyword only should always return the raw value of that card. That way cards containing values that happen to valid RVKCs but were not intended to be will still be treated like normal cards. Corresponds to PyFITS ticket 184.
- Looking up a RVKC in a header with only part of the field-specifier (for example "DP1.AXIS" instead of "DP1.AXIS.1") was implicitly treated as a wildcard lookup. Corresponds to PyFITS ticket 184.
- Fixed a crash when diffing two FITS files where at least one contains a compressed image HDU which was not recognized as an image instead of a table. Corresponds to PyFITS ticket 187.
- Fixed a bug where opening a file containing compressed image HDUs in 'update' mode and then immediately closing it without making any changes caused the file to be rewritten unnecessarily.
- Fixed two memory leaks that could occur when writing compressed image data, or in some cases when opening files containing compressed image HDUs in 'update' mode.
- Fixed a bug where
ImageHDU.scale(option='old')wasn't working at all--it was not restoring the image to its original BSCALE and BZERO values. - Fixed a bug when writing out files containing zero-width table columns, where the TFIELDS keyword would be updated incorrectly, leaving the table largely unreadable.
- Fixed a minor string formatting issue.
- Fixed bugs in the backwards compatibility layer for the
CardList.indexandCardList.countmethods. Corresponds to PyFITS ticket 190. - Improved
__repr__and text file representation of cards with long values that are split into CONTINUE cards. Corresponds to PyFITS ticket 193. - Fixed a crash when trying to assign a long (> 72 character) value to blank ('') keywords. This also changed how blank keywords are represented--there are still exactly 8 spaces before any commentary content can begin; this may affect the exact display of header cards that assumed there could be fewer spaces in a blank keyword card before the content begins. However, the current approach is more in line with the requirements of the FITS standard. Corresponds to PyFITS ticket 194.
- Improved handling of scaled images and pseudo-unsigned integer images in
compressed image HDUs. They now work more transparently like normal image
HDUs with support for the
astropy.io.votable- The Table class now maintains a single array object which is a Numpy masked array. For variable-length columns, the object that is stored there is also a Numpy masked array.
- Changed the
pedanticconfiguration option to beFalseby default due to the vast proliferation of non-compliant VO Tables. [#296] - Renamed astropy.io.vo to astropy.io.votable.
astropy.table- Added a workaround for an upstream bug in Numpy 1.6.2 that could cause a maximum recursion depth RuntimeError when printing table rows. [#341]
astropy.wcs- Updated to wcslib 4.15 [#418]
- Fixed a problem with handling FITS headers on locales that do not use dot as a decimal separator. This required an upstream fix to wcslib which is included in wcslib 4.14. [#313]
- Fixed some tests that could fail due to missing/incorrect logging configuration--ensures that tests don't have any impact on the default log location or contents. [#291]
- Various minor documentation fixes [#293 and others]
- Fixed a bug where running the tests with the
py.testcommand still tried to replace the system-installed pytest with the one bundled with Astropy. [#454] - Improved multiprocessing compatibility for file downloads. [#615]
- Fixed handling of Cython modules when building from a source checkout of a tagged release version. [#594]
- Added a workaround for a bug in Sphinx that could occur when using the
:tocdepth:directive. [#595] - Minor VOTable fixes [#596]
- Fixed how
setup.pyusesdistribute_setup.pyto prevent possibleVersionConflicterrors when an older version of distribute is already installed on the user's system. [#616][#640] - Changed use of
log.warnin the logging module tolog.warningsince the former is deprecated. [#624]
- Initial release.