------------------------------------------------------------------- Wed May 27 09:36:06 UTC 2020 - Petr Gajdos - %python3_only -> %python_alternative ------------------------------------------------------------------- Sun Apr 19 10:53:30 UTC 2020 - Benjamin Greiner - Update to 4.0.1.post1 * astropy.config [gh#astropy/astropy#9975] Fixed a bug where importing a development version of a package that uses ``astropy`` configuration system can result in a ``~/.astropy/config/package..cfg`` file. * astropy.coordinates [gh#astropy/astropy#9815] Fixed a bug where a vestigal trace of a frame class could persist in the transformation graph even after the removal of all transformations involving that frame class. [gh#astropy/astropy#9815] Fixed a bug with ``TransformGraph.remove_transform()`` when the "from" and "to" frame classes are not explicitly specified. [gh#astropy/astropy#9900] Read-only longitudes can now be passed in to ``EarthLocation`` even if they include angles outside of the range of -180 to 180 degrees. [gh#astropy/astropy#9980] ```SkyCoord.radial_velocity_correction``` no longer raises an Exception when space motion information is present on the SkyCoord. * astropy.io [gh#astropy/astropy#9866] Fixed a bug that prevented the unified I/O infrastructure from working with datasets that are represented by directories rather than files. * astropy.io.ascii [gh#astropy/astropy#9918] Fixed a bug in the ``fast_reader`` C parsers incorrectly returning entries of isolated positive/negative signs as ``float`` instead of ``str``. [gh#astropy/astropy#9923] Fixed a segmentation fault in the ``fast_reader`` C parsers when parsing an invalid file with ``guess=True`` and the file contains inconsistent column numbers in combination with a quoted field; e.g., ``"1 2\n 3 4 '5'"``. [gh#astropy/astropy#9933] Magnitude, decibel, and dex can now be stored in ``ecsv`` files. * astropy.io.misc [gh#astropy/astropy#9933] Magnitude, decibel, and dex can now be stored in ``hdf5`` files. [gh#astropy/astropy#9956, gh#astropy/astropy#9961] Fixed serialization of polynomial models to include non default values of domain and window values. [gh#astropy/astropy#9950] Fixed a bug which affected overwriting tables within ``hdf5`` files. Overwriting an existing path with associated column meta data now also overwrites the meta data associated with the table. [gh#astropy/astropy#9983] Fixed serialization of Time objects with location under time-1.0.0 ASDF schema. * astropy.io.fits [gh#astropy/astropy#9711, gh#astropy/astropy#9934] Fix regression with ``GroupsHDU`` which needs to modify the header to handle invalid headers, and fix accesing ``.data`` for empty HDU. [gh#astropy/astropy#9711] Fix ``fitsdiff`` when its arguments are directories that contain other directories. [gh#astropy/astropy#9958] Fix writing noncontiguous data to a compressed HDU. [gh#astropy/astropy#9978] Added verification of ``disp`` (``TDISP``) keyword to ``fits.Column`` and extended tests for ``TFORM`` and ``TDISP`` validation. [gh#astropy/astropy#10012] Fix checksum verification to process all HDUs instead of only the first one because of the lazy loading feature. [gh#astropy/astropy#10030] Allow passing ``output_verify`` to ``.close`` when using the context manager. [gh#astropy/astropy#10041] Prevent instantiation of ``PrimaryHDU`` and ``ImageHDU`` with a scalar. [gh#astropy/astropy#10069] Fix column access by attribute with FITS_rec: columns with scaling or columns from ASCII tables where not properly converted when accessed by attribute name. * astropy.io.misc [gh#astropy/astropy#9933] Magnitude, decibel, and dex can now be stored in ``hdf5`` files. [gh#astropy/astropy#9956, gh#astropy/astropy#9961] Fixed serialization of polynomial models to include non default values of domain and window values. [gh#astropy/astropy#9950] Fixed a bug which affected overwriting tables within ``hdf5`` files. Overwriting an existing path with associated column meta data now also overwrites the meta data associated with the table. [gh#astropy/astropy#9983] Fixed serialization of Time objects with location under time-1.0.0 ASDF schema. * astropy.modeling [gh#astropy/astropy#9987] Fixed a bug in setting default values of parameters of orthonormal polynomials when constructing a model set. * astropy.table [gh#astropy/astropy#9839] Fixed bug in ``Table.reverse`` for tables that contain non-mutable mixin columns (like ``SkyCoord``) for which in-place item update is not allowed. [gh#astropy/astropy#9933] Tables containing Magnitude, decibel, and dex columns can now be saved to ``ecsv`` files. [gh#astropy/astropy#10027] Fixed bug where adding or inserting a row fails on a table with an index defined on a column that is not the first one. [gh#astropy/astropy#10068] Ensured that ``table.show_in_browser`` also worked for mixin columns like ``Time`` and ``SkyCoord``. * astropy.time [gh#astropy/astropy#9679] Fix inaccuracy when converting between TimeDelta and datetime.timedelta. [gh#astropy/astropy#9812] Fixed exception when changing ``format`` in the case when ``out_subfmt`` is defined and is incompatible with the new format. [gh#astropy/astropy#9812] Fixed exceptions in ``Time.to_value()``: when supplying any ``subfmt`` argument for string-based formats like 'iso', and for ``subfmt='long'`` for the formats 'byear', 'jyear', and 'decimalyear'. [gh#astropy/astropy#9969] Fixed bug where the location attribute was lost when creating a new ``Time`` object from an existing ``Time`` or list of ``Time`` objects. [gh#astropy/astropy#10034] Fixed a bug where an exception occurred when creating a ``Time`` object if the ``val1`` argument was a regular double and the ``val2`` argument was a ``longdouble``. * astropy.timeseries [gh#astropy/astropy#10013] Fixed issue with reference time for the ``transit_time`` parameter returned by the ``BoxLeastSquares`` periodogram. Now, the ``transit_time`` will be within the range of the input data and arbitrary time offsets/zero points no longer affect results. * astropy.units [gh#astropy/astropy#9948] Fix for ``quantity_input`` annotation raising an exception on iterable types that don't define a general ``__contains__`` for checking if ``None`` is contained (e.g. Enum as of python3.8), by instead checking for instance of Sequence. [gh#astropy/astropy#10066] Fix for ``u.Quantity`` not taking into account ``ndmin`` if constructed from another ``u.Quantity`` instance with different but convertible unit * astropy.utils [gh#astropy/astropy#9981] Fixed ``deprecated_renamed_argument`` not passing in user value to deprecated keyword when the keyword has no new name. [gh#astropy/astropy#9985] Fixed ``deprecated_renamed_argument`` not issuing a deprecation warning when deprecated keyword without new name is passed in as positional argument. [gh#astropy/astropy#10007] Fixed detection of read-only filesystems in the caching code. * astropy.visualization [gh#astropy/astropy#9848] Fixed bug from matplotlib >=3.1 where an empty Quantity array is sent for unit conversion as an empty list. [gh#astropy/astropy#9913] Fix bug in ``ZScaleInterval`` to return the array minimum and maximum when there are less then ``min_npixels`` in the input array. [gh#astropy/astropy#8004, gh#astropy/astropy#9991] Fix a bug in simplifying axis labels that affected non-rectangular frames. * Increase minimum asdf version to 2.5.2. [gh#astropy/astropy#9996, gh#astropy/astropy#9819] * Updated wcslib to v7.2. [gh#astropy/astropy#10021] - updated test requirements and recommends - run pytest directly ------------------------------------------------------------------- Tue Jan 7 10:19:19 UTC 2020 - Sebastian Wagner - Require erfa >= 1.7 because of https://github.com/astropy/astropy/issues/9654 ------------------------------------------------------------------- Mon Jan 6 17:59:53 UTC 2020 - Todd R - Update to 4.0 + New Features > astropy.config * The config and cache directories and the name of the config file are now customizable. This allows affiliated packages to put their configuration files in locations other than ``CONFIG_DIR/.astropy/``. > astropy.constants * The version of constants can be specified via ScienceState in a way that ``constants`` and ``units`` will be consistent. * Default constants now use CODATA 2018 and IAU 2015 definitions. * Constants can be pickled and unpickled. > astropy.convolution * Fixed a bug where having a kernel defined using unitless astropy quantity objects would result in a crash > astropy.coordinates * Changed ``coordinates.solar_system_ephemeris`` to also accept local files as input. The ephemeris can now be selected by either keyword (e.g. 'jpl', 'de430'), URL or file path. * Added a ``cylindrical`` property to ``SkyCoord`` for shorthand access to a ``CylindricalRepresentation`` of the coordinate, as is already available for other common representations. * The default parameters for the ``Galactocentric`` frame are now controlled by a ``ScienceState`` subclass, ``galactocentric_frame_defaults``. New parameter sets will be added to this object periodically to keep up with ever-improved measurements of the solar position and motion. * Coordinate frame classes can now have multiple aliases by assigning a list of aliases to the class variable ``name``. Any of the aliases can be used for attribute-style access or as the target of ``tranform_to()`` calls. * Passing a NaN to ``Distance`` no longer raises a warning. > astropy.cosmology * The pre-publication Planck 2018 cosmological parameters are included as the ``Planck2018_arXiv_v2`` object. Please note that the values are preliminary, and when the paper is accepted a final version will be included as ``Planck18``. > astropy.io.ascii * Removed incorrect warnings on ``Overflow`` when reading in ``FloatType`` 0.0 with ``use_fast_converter``; synchronised ``IntType`` ``Overflow`` warning messages. > astropy.io.misc * Eliminate deprecated compatibility mode when writing ``Table`` metadata to HDF5 format. * Add support for orthogonal polynomial models to ASDF. > astropy.io.fits * Changed the ``fitscheck`` and ``fitsdiff`` script to use the ``argparse`` module instead of ``optparse``. * Allow writing of ``Table`` objects with ``Time`` columns that are also table indices to FITS files. > astropy.io.votable * Support VOTable version 1.4. The main addition is the new element, TIMESYS, which allows defining of metadata for temporal coordinates much like COOSYS defines metadata for celestial coordinates. > astropy.logger * Added a configuration option to specify the text encoding of the log file, with the default behavior being the platform-preferred encoding. > astropy.modeling * Major rework of modeling internals. `See modeling documentation for details. `_ . * Add ``Tabular1D.inverse``. * ``Model.rename`` was changed to add the ability to rename ``Model.inputs`` and ``Model.outputs``. * New function ``fix_inputs`` to generate new models from others by fixing specific inputs variable values to constants. * ``inputs`` and ``outputs`` are now model instance attributes, and ``n_inputs`` and ``n_outputs`` are class attributes. Backwards compatible default values of ``inputs`` and ``outputs`` are generated. ``Model.inputs`` and ``Model.outputs`` are now settable which allows renaming them on per user case. * Add a new model representing a sequence of rotations in 3D around an arbitrary number of axes. * Add many of the numpy ufunc functions as models. * Add ``BlackBody`` model. * Add ``Drude1D`` model. * Added analytical King model (KingProjectedAnalytic1D). * Added Exponential1D and Logarithmic1D models. > astropy.nddata * Add a way for technically invalid but unambiguous units in a fits header to be parsed by ``CCDData``. * ``NDData`` now only accepts WCS objects which implement either the high, or low level APE 14 WCS API. All WCS objects are converted to a high level WCS object, so ``NDData.wcs`` now always returns a high level APE 14 object. Not all array slices are valid for wcs objects, so some slicing operations which used to work may now fail. > astropy.stats * The ``biweight_location``, ``biweight_scale``, and ``biweight_midvariance`` functions now allow for the ``axis`` keyword to be a tuple of integers. * Added an ``ignore_nan`` option to the ``biweight_location``, ``biweight_scale``, and ``biweight_midvariance`` functions. * A numpy ``MaskedArray`` can now be input to the ``biweight_location``, ``biweight_scale``, and ``biweight_midvariance`` functions. * Removed the warning related to p0 in the Bayesian blocks algorithm. The caveat related to p0 is described in the docstring for ``Events``. > astropy.table * Improved the implementation of ``Table.replace_column()`` to provide a speed-up of 5 to 10 times for wide tables. The method can now accept any input which convertible to a column of the correct length, not just ``Column`` subclasses. * Improved the implementation of ``Table.add_column()`` to provide a speed-up of 2 to 10 (or more) when adding a column to tables, with increasing benefit as the number of columns increases. The method can now accept any input which is convertible to a column of the correct length, not just ``Column`` subclasses. * Changed the implementation of ``Table.add_columns()`` to use the new ``Table.add_column()`` method. In most cases the performance is similar or slightly faster to the previous implemenation. * ``MaskedColumn.data`` will now return a plain ``MaskedArray`` rather than the previous (unintended) ``masked_BaseColumn``. * Added depth-wise stacking ``dstack()`` in higher level table operation. It help will in stacking table column depth-wise. * Added a new table equality method ``values_equal()`` which allows comparison table values to another table, list, or value, and returns an element-by-element equality table. * Added new ``join_type='cartesian'`` option to the ``join`` operation. * Allow adding a table column as a list of mixin-type objects, for instance ``t['q'] = [1 * u.m, 2 * u.m]``. * Allow table ``join()`` using any sortable key column (e.g. Time), not just ndarray subclasses. A column is considered sortable if there is a ``.info.get_sortable_arrays()`` method that is implemented. * Added ``Table.iterrows()`` for making row-wise iteration faster. * Allow table to be initialized with a list of dict where the dict keys are not the same in every row. The table column names are the set of all keys found in the input data, and any missing key/value pairs are turned into missing data in the table. * Prevent unnecessary ERFA warnings when indexing by ``Time`` columns. * Added support for sorting tables which contain non-mutable mixin columns (like ``SkyCoord``) for which in-place item update is not allowed. * Ensured that inserting ``np.ma.masked`` (or any other value with a mask) into a ``MaskedColumn`` causes a masked entry to be inserted. * Fixed a bug that caused an exception when initializing a ``MaskedColumn`` from another ``MaskedColumn`` that has a structured dtype. > astropy.tests * The plugin that handles the custom header in the test output has been moved to the ``pytest-astropy-header plugin`` package. `See the README at `__ for information about using this new plugin. > astropy.time * Added a new time format ``ymdhms`` for representing times via year, month, day, hour, minute, and second attributes. * ``TimeDelta`` gained a ``to_value`` method, so that it becomes easier to use it wherever a ``Quantity`` with units of time could be used. * Made scalar ``Time`` and ``TimeDelta`` objects hashable based on JD, time scale, and location attributes. * Improved error message when bad input is used to initialize a ``Time`` or ``TimeDelta`` object and the format is specified. * Allow numeric time formats to be initialized with numpy ``longdouble``, ``Decimal`` instances, and strings. One can select just one of these using ``in_subfmt``. The output can be similarly set using ``out_subfmt``. * Introduce a new ``.to_value()`` method for ``Time`` (and adjusted the existing method for ``TimeDelta``) so that one can get values in a given ``format`` and possible ``subfmt`` (e.g., ``to_value('mjd', 'str')``. * Prevent unecessary ERFA warnings when sorting ``Time`` objects. > astropy.timeseries * Addig ``epoch_phase``, ``wrap_phase`` and ``normalize_phase`` keywords to ``TimeSeries.fold()`` to control the phase of the epoch and to return normalized phase rather than time for the folded TimeSeries. > astropy.uncertainty * ``Distribution`` was rewritten such that it deals better with subclasses. As a result, Quantity distributions now behave correctly with ``to`` methods yielding new distributions of the kind expected for the starting distribution, and ``to_value`` yielding ``NdarrayDistribution`` instances. * The ``pdf_*`` properties that were used to calculate statistical properties of ``Distrubution`` instances were changed into methods. This allows one to pass parameters such as ``ddof`` to ``pdf_std`` and ``pdf_var`` (which generally should equal 1 instead of the default 0), and reflects that these are fairly involved calcuations, not just "properties". > astropy.units * Support for unicode parsing. Currently supported superscripts are Ohm, Ångström, and the micro-sign. * Accept non-unit type annotations in @quantity_input. * For numpy 1.17 and later, the new ``__array_function__`` protocol is used to ensure that all top-level numpy functions interact properly with ``Quantity``, preserving units also in operations like ``np.concatenate``. * Add equivalencies for surface brightness units to spectral_density. > astropy.utils * ``astropy.utils.data.download_file`` and ``astropy.utils.data.get_readable_fileobj`` now provides an ``http_headers`` keyword to pass in specific request headers for the download. It also now defaults to providing ``User-Agent: Astropy`` and ``Accept: */*`` headers. The default ``User-Agent`` value can be set with a new ``astropy.data.conf.default_http_user_agent`` configuration item. * Added a new ``astropy.utils.misc.unbroadcast`` function which can be used to return the smallest array that can be broadcasted back to the initial array. * The specific IERS Earth rotation parameter table used for time and coordinate transformations can now be set, either in a context or per session, using ``astropy.utils.iers.earth_rotation_table``. * Added ``export_cache`` and ``import_cache`` to permit transporting downloaded data to machines with no Internet connection. Several new functions are available to investigate the cache contents; e.g., ``check_download_cache`` can be used to confirm that the persistent cache has not become damaged. * A new ``astropy.utils.iers.LeapSeconds`` class has been added to track leap seconds. > astropy.visualization * Added a new ``time_support`` context manager/function for making it easy to plot and format ``Time`` objects in Matplotlib. * Added support for plotting any WCS compliant with the generalized (APE 14) WCS API with WCSAxes. * Improved display of information when inspecting ``WCSAxes.coords``. * Improved error checking for the ``slices=`` argument to ``WCSAxes``. * Added support for more solar frames in WCSAxes. * Add support for one dimensional plots to ``WCSAxes``. * Add a ``get_format_unit`` to ``wcsaxes.CoordinateHelper``. * ``WCSAxes`` now, by default, sets a default label for plot axes which is the WCS physical type (and unit) for that axis. This can be disabled using the ``coords[i].set_auto_axislabel(False)`` or by explicitly setting an axis label. * Fixed the display of tick labels when plotting all sky images that have a coord_wrap less than 360. > astropy.wcs * Added a ``astropy.wcs.wcsapi.pixel_to_pixel`` function that can be used to transform pixel coordinates in one dataset with a WCS to pixel coordinates in another dataset with a different WCS. This function is designed to be efficient when the input arrays are broadcasted views of smaller arrays. * Added a ``local_partial_pixel_derivatives`` function that can be used to determine a matrix of partial derivatives of each world coordinate with respect to each pixel coordinate. * Updated wcslib to v6.4. * Improved the ``SlicedLowLevelWCS`` class in ``astropy.wcs.wcsapi`` to avoid storing chains of nested ``SlicedLowLevelWCS`` objects when applying multiple slicing operations in turn. * Added a ``wcs_info_str`` function to ``astropy.wcs.wcsapi`` to show a summary of an APE-14-compliant WCS as a string. * Added two new optional attributes to the APE 14 low-level WCS: ``pixel_axis_names`` and ``world_axis_names``. * Updated the WCS class to now correctly take and return ``Time`` objects in the high-level APE 14 API (e.g. ``pixel_to_world``. * ``SlicedLowLevelWCS`` now raises ``IndexError`` rather than ``ValueError`` on an invalid slice. * Added ``fit_wcs_from_points`` function to ``astropy.wcs.utils``. Fits a WCS object to set of matched detector/sky coordinates. * Fix various bugs in ``SlicedLowLevelWCS`` when the WCS being sliced was one dimensional. + API Changes > astropy.constants * Deprecated ``set_enabled_constants`` context manager. Use ``astropy.physical_constants`` and ``astropy.astronomical_constants``. > astropy.convolution * Removed the deprecated keyword argument ``interpolate_nan`` from ``convolve_fft``. * Removed the deprecated keyword argument ``stddev`` from ``Gaussian2DKernel``. * Deprecated and renamed ``MexicanHat1DKernel`` and ``MexicanHat2DKernel`` to ``RickerWavelet1DKernel`` and ``RickerWavelet2DKernel``. > astropy.coordinates * Removed the ``recommended_units`` attribute from Representations; it was deprecated since 3.0. * Removed the deprecated frame attribute classes, ``FrameAttribute``, ``TimeFrameAttribute``, ``QuantityFrameAttribute``, ``CartesianRepresentationFrameAttribute``; deprecated since 3.0. * Removed ``longitude`` and ``latitude`` attributes from ``EarthLocation``; deprecated since 2.0. * The ``DifferentialAttribute`` for frame classes now passes through any input to the ``allowed_classes`` if only one allowed class is specified, i.e. this now allows passing a quantity in for frame attributes that use ``DifferentialAttribute``. * Removed the deprecated ``galcen_ra`` and ``galcen_dec`` attributes from the ``Galactocentric`` frame. > astropy.extern * Remove the bundled ``six`` module. > astropy.io.ascii * Masked column handling has changed, see ``astropy.table`` entry below. > astropy.io.misc * Masked column handling has changed, see ``astropy.table`` entry below. * Removed deprecated ``usecPickle`` kwarg from ``fnunpickle`` and ``fnpickle``. > astropy.io.fits * Masked column handling has changed, see ``astropy.table`` entry below. * ``io.fits.Header`` has been made safe for subclasses for copying and slicing. As a result of this change, the private subclass ``CompImageHeader`` now always should be passed an explicit ``image_header``. * Removed the deprecated ``tolerance`` option in ``fitsdiff`` and ``io.fits.diff`` classes. * Removed deprecated keyword arguments for ``CompImageHDU``: ``compressionType``, ``tileSize``, ``hcompScale``, ``hcompSmooth``, ``quantizeLevel``. > astropy.io.votable * Changed ``pedantic`` argument to ``verify`` and change it to have three string-based options (``ignore``, ``warn``, and ``exception``) instead of just being a boolean. In addition, changed default to ``ignore``, which means that warnings will not be shown by default when loading VO tables. > astropy.modeling * Eliminates support for compound classes (but not compound instances!) * Slicing compound models more restrictive. * Shape of parameters now includes n_models as dimension. * Parameter instances now hold values instead of models. * Compound model parameters now share instance and value with constituent models. * No longer possible to assign slices of parameter values to model parameters attribute (it is possible to replace it with a complete array). * Many private attributes and methods have changed (see documentation). * Deprecated ``BlackBody1D`` model and ``blackbody_nu`` and ``blackbody_lambda`` functions. * The deprecated ``rotations.rotation_matrix_from_angle`` was removed. * Deprecated and renamed ``MexicanHat1D`` and ``MexicanHat2D`` to ``RickerWavelet1D`` and ``RickerWavelet2D``. * Deprecated ``modeling.utils.ExpressionTree``. > astropy.stats * Removed the ``iters`` keyword from sigma clipping stats functions. * Renamed the ``a`` parameter to ``data`` in biweight stat functions. * Renamed the ``a`` parameter to ``data`` in ``median_absolute_deviation``. * Renamed the ``conflevel`` keyword to ``confidence_level`` in ``poisson_conf_interval``. Usage of ``conflevel`` now issues ``AstropyDeprecationWarning``. * Renamed the ``conf`` keyword to ``confidence_level`` in ``binom_conf_interval`` and ``binned_binom_proportion``. Usage of ``conf`` now issues ``AstropyDeprecationWarning``. * Renamed the ``conf_lvl`` keyword to ``confidence_level`` in ``jackknife_stats``. Usage of ``conf_lvl`` now issues ``AstropyDeprecationWarning``. > astropy.table * The handling of masked columns in the ``Table`` class has changed in a way that may impact program behavior. Now a ``Table`` with ``masked=False`` may contain both ``Column`` and ``MaskedColumn`` objects, and adding a masked column or row to a table no longer "upgrades" the table and columns to masked. This means that tables with masked data which are read via ``Table.read()`` will now always have ``masked=False``, though specific columns will be masked as needed. Two new table properties ``has_masked_columns`` and ``has_masked_values`` were added. See the `Masking change in astropy 4.0 section within `_ for details. * Table operation functions such as ``join``, ``vstack``, ``hstack``, etc now always return a table with ``masked=False``, though the individual columns may be masked as necessary. * Changed implementation of ``Table.add_column()`` and ``Table.add_columns()`` methods. Now it is possible add any object(s) which can be converted or broadcasted to a valid column for the table. ``Table.__setitem__`` now just calls ``add_column``. * Changed default table configuration setting ``replace_warnings`` from ``['slice']`` to ``[]``. This removes the default warning when replacing a table column that is a slice of another column. * Removed the non-public method ``astropy.table.np_utils.recarray_fromrecords``. > astropy.tests * In addition to ``DeprecationWarning``, now ``FutureWarning`` and ``ImportWarning`` would also be turned into exceptions. * ``warnings_to_ignore_by_pyver`` option in ``enable_deprecations_as_exceptions()`` has changed. Please refer to API documentation. * Default settings for ``warnings_to_ignore_by_pyver`` are updated to remove very old warnings that are no longer relevant and to add a new warning caused by ``pytest-doctestplus``. > astropy.time * ``Time.get_ut1_utc`` now uses the auto-updated ``IERS_Auto`` by default, instead of the bundled ``IERS_B`` file. * Time formats that do not use ``val2`` now raise ValueError instead of silently ignoring a provided value. * Custom time formats can now accept floating-point types with extended precision. Existing time formats raise exceptions rather than discarding extended precision through conversion to ordinary floating-point. * Time formats (implemented in subclasses of ``TimeFormat``) now have their input and output routines more thoroughly validated, making it more difficult to create damaged ``Time`` objects. * The ``TimeDelta.to_value()`` method now can also take the ``format`` name as its argument, in which case the value will be calculated using the ``TimeFormat`` machinery. For this case, one can also pass a ``subfmt`` argument to retrieve the value in another form than ``float``. > astropy.timeseries * Keyword ``midpoint_epoch`` is renamed to ``epoch_time``. > astropy.uncertainty * ``Distribution`` was rewritten such that it deals better with subclasses. As a result, Quantity distributions now behave correctly with ``to`` methods yielding new distributions of the kind expected for the starting distribution, and ``to_value`` yielding ``NdarrayDistribution`` instances. > astropy.units * For consistency with ``ndarray``, scalar ``Quantity.value`` will now return a numpy scalar rather than a python one. This should help keep track of precision better, but may lead to unexpected results for the rare cases where numpy scalars behave differently than python ones (e.g., taking the square root of a negative number). * Removed the ``magnitude_zero_points`` module, which was deprecated in favour of ``astropy.units.photometric`` since 3.1. * ``EquivalentUnitsList`` now has a ``_repr_html_`` method to output a HTML table on a call to ``find_equivalent_units`` in Jupyter notebooks. > astropy.utils * ``download_file`` and related functions now accept a list of fallback sources, and they are able to update the cache at the user's request. * Allow ``astropy.utils.console.ProgressBarOrSpinner.map`` and ``.map_unordered`` to take an argument ``multiprocessing_start_method`` to control how subprocesses are started; the different methods (``fork``, ``spawn``, and ``forkserver``) have different implications in terms of security, efficiency, and behavioural anomalies. The option is useful in particular for cross-platform testing because Windows supports only ``spawn`` while Linux defaults to ``fork``. * All operations that act on the astropy download cache now take an argument ``pkgname`` that allows one to specify which package's cache to use. * Removed deprecated ``funcsigs`` and ``futures`` from ``astropy.utils.compat``. * Removed the deprecated ``astropy.utils.compat.numpy`` module. * Deprecated ``InheritDocstrings`` as it is natively supported by Sphinx 1.7 or higher. * Deprecated ``astropy.utils.timer`` module, which has been moved to ``astroquery.utils.timer`` and will be part of ``astroquery`` 0.4.0. * Deprecated ``astropy.utils.misc.set_locale`` function, as it is meant for internal use only. * The implementation of ``data_info.DataInfo`` has changed (for a considerable performance boost). Generally, this should not affect simple subclasses, but because the class now uses ``__slots__`` any attributes on the class have to be explicitly given a slot. * ``IERS`` tables now use ``nan`` to mark missing values (rather than ``1e20``). > astropy.visualization * The default ``clip`` value is now ``False`` in ``ImageNormalize``. * The default ``clip`` value is now ``False`` in ``simple_norm``. * Infinite values are now excluded when calculating limits in ``ManualInterval`` and ``MinMaxInterval``. They were already excluded in all other interval classes. + Bug Fixes > astropy.coordinates * The ``QuantityAttribute`` class now supports a None default value if a unit is specified. * When ``Representation`` classes with the same name are defined, this no longer leads to a ``ValueError``, but instead to a warning and the removal of both from the name registry (i.e., one either has to use the class itself to set, e.g., ``representation_type``, or refer to the class by its fully qualified name). > astropy.io.fits * Implemented skip (after warning) of header cards with reserved keywords in ``table_to_hdu``. * Add ``AstropyDeprecationWarning`` to ``read_table_fits`` when ``hdu=`` is selected, but does not match single present table HDU. > astropy.io.votable * Ignore BINARY2 null mask bits for string values on parsing a VOTable. In this way, the reader should never create masked values for string types. * Corrected a spurious warning issued for the ``value`` attribute of the ``