fix 1.9 alignment issues #5316
Merged
fix 1.9 alignment issues #5316
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
|
@cournape can you test this on win32? it works on linux32 with -malign-double so it should work on windows too. |
|
should fix scipy/scipy#4168 |
| @@ -19,7 +20,11 @@ | |||
| * amd64 is not harmed much by the bloat as the system provides 16 byte | |||
| * alignment by default. | |||
| */ | |||
| #if (defined NPY_CPU_X86 || defined _WIN32) && !defined NPY_CPU_SPARC | |||
There was a problem hiding this comment.
Is the check on NPY_CPU_SPARC needed? Not that it hurts...
There was a problem hiding this comment.
I think sparc will bus error without it, but I'll test that again
|
@juliantaylor: Would it be possible to take this opportunity to write a few paragraphs on what the ALIGNED flag actually means, how it's used, and the constraints it has to satisfy? Partly to make reviewing this easier but mostly so we can avoid so much confusion if it breaks later? |
|
note that this makes most flexible types aligned again regardless on whether they are. |
If itemsize is a power of two use that as the required alignment up to the maximum provided by the platform. Power of two sizes may be accessed via larger moves than bytes. Non-power of two sizes are accessed bytewise and can thus always be considered aligned. Closes numpygh-5293
malloc only provides 8byte alignment and is sufficient to load complex on x86 platforms. This fixes the f2py alignment failures with complex types on win32 or on linux32 with -malign-double
juliantaylor
force-pushed
the
align-fixes
branch
from
46de849
to
7d106d5
Compare
|
There is an alignment flag for the flexible dtype creation that aligns the structure. Not sure how that interacts with the rest of it except that if columns are extracted the addresses will check as aligned. |
|
What I would expect to happen: When creating a structured dtype, if you pass Eg:
And then I'd expect that the overall array's However:
What a mess. |
|
@cournape Have you had a chance to test this? |
|
@charris I have tested something slightly different (though has the same end result) in cournape/numpy@9fdcc60 We could make the factor 2 for complex conditional on the platform, though. I have some issues accessing my build setup from here, I will have more results for every platform tomorrow. |
|
Ok, so with my patch cournape/numpy@9fdcc60, I get no errors for numpy test suite, and only "minor" precision test failures for scipy. Platforms tested:
I see a non trivial amount of failures with other packages, but nothing that seem alignment related. |
|
@juliantaylor Any reason to prefer one patch or the other? @cournape It looks like you don't test SPARC, it that the case? |
|
@charris I don't have access to sparc. If necessary, I could try to install debian on qemu sparc I guess, though I would rather not. From a C standard POV, I would say removing the factor 2 in alignment as I do is the most obvious fix ( |
|
@matthew-brett seems to be the go-to guy for testing things on sparc. I On Wed, Dec 3, 2014 at 8:45 AM, David Cournapeau notifications@github.com
Nathaniel J. Smith |
|
@njsmith I actually contacted him already :) I tried to install debian on sparc on qemu, but that did not go too well (and it took > 10 hours...) |
|
this patch is tested on sparc, I can probably test davids version later this week |
|
The SPARC I have access to belongs to Yarik Halchenko and the NeuroDebian I have emailed him about access for y'all but the machine seems to be down |
|
Part of Numpy assumes Btw, the doubling of alignment of complex was done already in Numpy 1.8.x: The former is compatible with the C compiler, the latter is not. This IIRC doesn't pad properly the end of the struct, so probably not so widely used. The new buffer interface with aligned structs containing complex members is probably also fairly rarely used... |
|
Hi all, Is there a release schedule for numpy 1.9.2 ? |
|
@juliantaylor @cournape @pv et al. Time to settle this, we now have three alignment PRs, this, #5365, and #5457. I don't understand the bento build failure in #5365. I'm tempted to just apply this, but Pauli's comment #5365 (comment) looks interesting. |
|
@juliantaylor Is this rebased for backport? |
|
the bento failure is a real bug, namely the misalignment crash which is the reason for all this mess fwiw, I have yet another branch which changes the copy loops to check the alignment instead of using the dtype flag. Its almost ready, I think only the raw_assign* stuff still needs checking, unfortunately that code duplicates all the other in functionality but in a slightly different way. |
|
OK, shall I do a backport and close this? |
|
sure, did you make a list of all other bugs you merged into 1.10 which were not backported? |
| alignment = NPY_MAX_COPY_ALIGNMENT; | ||
| npy_intp itemsize = PyArray_ITEMSIZE(ap); | ||
| /* power of two sizes may be loaded in larger moves */ | ||
| if (((itemsize & (itemsize - 1)) == 0)) { |
There was a problem hiding this comment.
this should probably be removed and just restored to 1.8 state (always aligned)
this might still cause issues and I think I have a better solution in my other fix attempt branch
There was a problem hiding this comment.
Just replace common.c with the 1.8 version?
|
I was thinking that the only thing(s) that really matters is fixing the alignment problem, as folks are reluctant to use 1.9.1 until f2py and scipy work reliably. Currently, there are fixes for ATLAS 3.10 and xerbla in 1.9.x, and a couple of other minor bits, but I'd rather get 1.9.2 out and then do the first 1.10 in a couple of months. Current 1.9.x commits minus merge commits: |
|
There are always going to be bugs, The Bugcount Also Rises |
|
@juliantaylor that doesn't sound good, take it easy - a burnout is no fun. You're certainly not the only one who cares about maintenance branches. You just switched to a much more labor-intensive way of updating those branches than we used before. I was used to just doing a big backport of appropriate fixes in one go, typically in preparation for a maintenance release. That has a couple of advantages:
Furthermore, we (you and Chuck mainly) changed recently to a significantly more agressive backporting strategy, maybe even without realizing it. With the associated extra work. Previously we didn't backport all fixes, only ones deemed important enough. Final comment: if we'd set the Milestone of each merged PR to the right release, then it's easy to get an overview of all fixes that got merged for a release. For Scipy this has proven to be useful. |
|
And Re: expanding the developer docs: +10 |
Merged
|
@juliantaylor Closing this as there is now a 1.9 version and the 1.10 fix will be different. |
|
@juliantaylor Reopening this for 1.10. Do you have a better fix in mind? |
charris
added
Critical Defect
component: numpy._core
00 - Bug
and removed
Critical Defect
labels
jsonn
pushed a commit
to jsonn/pkgsrc
that referenced
this pull request
Apr 17, 2015
Reviewed by: wiz@ Upstream changes: NumPy 1.9.2 Release Notes ************************* This is a bugfix only release in the 1.9.x series. Issues fixed ============ * `#5316 <https://github.com/numpy/numpy/issues/5316>`__: fix too large dtype alignment of strings and complex types * `#5424 <https://github.com/numpy/numpy/issues/5424>`__: fix ma.median when used on ndarrays * `#5481 <https://github.com/numpy/numpy/issues/5481>`__: Fix astype for structured array fields of different byte order * `#5354 <https://github.com/numpy/numpy/issues/5354>`__: fix segfault when clipping complex arrays * `#5524 <https://github.com/numpy/numpy/issues/5524>`__: allow np.argpartition on non ndarrays * `#5612 <https://github.com/numpy/numpy/issues/5612>`__: Fixes ndarray.fill to accept full range of uint64 * `#5155 <https://github.com/numpy/numpy/issues/5155>`__: Fix loadtxt with comments=None and a string None data * `#4476 <https://github.com/numpy/numpy/issues/4476>`__: Masked array view fails if structured dtype has datetime component * `#5388 <https://github.com/numpy/numpy/issues/5388>`__: Make RandomState.set_state and RandomState.get_state threadsafe * `#5390 <https://github.com/numpy/numpy/issues/5390>`__: make seed, randint and shuffle threadsafe * `#5374 <https://github.com/numpy/numpy/issues/5374>`__: Fixed incorrect assert_array_almost_equal_nulp documentation * `#5393 <https://github.com/numpy/numpy/issues/5393>`__: Add support for ATLAS > 3.9.33. * `#5313 <https://github.com/numpy/numpy/issues/5313>`__: PyArray_AsCArray caused segfault for 3d arrays * `#5492 <https://github.com/numpy/numpy/issues/5492>`__: handle out of memory in rfftf * `#4181 <https://github.com/numpy/numpy/issues/4181>`__: fix a few bugs in the random.pareto docstring * `#5359 <https://github.com/numpy/numpy/issues/5359>`__: minor changes to linspace docstring * `#4723 <https://github.com/numpy/numpy/issues/4723>`__: fix a compile issues on AIX NumPy 1.9.1 Release Notes ************************* This is a bugfix only release in the 1.9.x series. Issues fixed ============ * gh-5184: restore linear edge behaviour of gradient to as it was in < 1.9. The second order behaviour is available via the `edge_order` keyword * gh-4007: workaround Accelerate sgemv crash on OSX 10.9 * gh-5100: restore object dtype inference from iterable objects without `len()` * gh-5163: avoid gcc-4.1.2 (red hat 5) miscompilation causing a crash * gh-5138: fix nanmedian on arrays containing inf * gh-5240: fix not returning out array from ufuncs with subok=False set * gh-5203: copy inherited masks in MaskedArray.__array_finalize__ * gh-2317: genfromtxt did not handle filling_values=0 correctly * gh-5067: restore api of npy_PyFile_DupClose in python2 * gh-5063: cannot convert invalid sequence index to tuple * gh-5082: Segmentation fault with argmin() on unicode arrays * gh-5095: don't propagate subtypes from np.where * gh-5104: np.inner segfaults with SciPy's sparse matrices * gh-5251: Issue with fromarrays not using correct format for unicode arrays * gh-5136: Import dummy_threading if importing threading fails * gh-5148: Make numpy import when run with Python flag '-OO' * gh-5147: Einsum double contraction in particular order causes ValueError * gh-479: Make f2py work with intent(in out) * gh-5170: Make python2 .npy files readable in python3 * gh-5027: Use 'll' as the default length specifier for long long * gh-4896: fix build error with MSVC 2013 caused by C99 complex support * gh-4465: Make PyArray_PutTo respect writeable flag * gh-5225: fix crash when using arange on datetime without dtype set * gh-5231: fix build in c99 mode NumPy 1.9.0 Release Notes ************************* This release supports Python 2.6 - 2.7 and 3.2 - 3.4. Highlights ========== * Numerous performance improvements in various areas, most notably indexing and operations on small arrays are significantly faster. Indexing operations now also release the GIL. * Addition of `nanmedian` and `nanpercentile` rounds out the nanfunction set. Dropped Support =============== * The oldnumeric and numarray modules have been removed. * The doc/pyrex and doc/cython directories have been removed. * The doc/numpybook directory has been removed. * The numpy/testing/numpytest.py file has been removed together with the importall function it contained. Future Changes ============== * The numpy/polynomial/polytemplate.py file will be removed in NumPy 1.10.0. * Default casting for inplace operations will change to 'same_kind' in Numpy 1.10.0. This will certainly break some code that is currently ignoring the warning. * Relaxed stride checking will be the default in 1.10.0 * String version checks will break because, e.g., '1.9' > '1.10' is True. A NumpyVersion class has been added that can be used for such comparisons. * The diagonal and diag functions will return writeable views in 1.10.0 * The `S` and/or `a` dtypes may be changed to represent Python strings instead of bytes, in Python 3 these two types are very different. Compatibility notes =================== The diagonal and diag functions return readonly views. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In NumPy 1.8, the diagonal and diag functions returned readonly copies, in NumPy 1.9 they return readonly views, and in 1.10 they will return writeable views. Special scalar float values don't cause upcast to double anymore ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In previous numpy versions operations involving floating point scalars containing special values ``NaN``, ``Inf`` and ``-Inf`` caused the result type to be at least ``float64``. As the special values can be represented in the smallest available floating point type, the upcast is not performed anymore. For example the dtype of: ``np.array([1.], dtype=np.float32) * float('nan')`` now remains ``float32`` instead of being cast to ``float64``. Operations involving non-special values have not been changed. Percentile output changes ~~~~~~~~~~~~~~~~~~~~~~~~~ If given more than one percentile to compute numpy.percentile returns an array instead of a list. A single percentile still returns a scalar. The array is equivalent to converting the list returned in older versions to an array via ``np.array``. If the ``overwrite_input`` option is used the input is only partially instead of fully sorted. ndarray.tofile exception type ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ All ``tofile`` exceptions are now ``IOError``, some were previously ``ValueError``. Invalid fill value exceptions ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Two changes to numpy.ma.core._check_fill_value: * When the fill value is a string and the array type is not one of 'OSUV', TypeError is raised instead of the default fill value being used. * When the fill value overflows the array type, TypeError is raised instead of OverflowError. Polynomial Classes no longer derived from PolyBase ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ This may cause problems with folks who depended on the polynomial classes being derived from PolyBase. They are now all derived from the abstract base class ABCPolyBase. Strictly speaking, there should be a deprecation involved, but no external code making use of the old baseclass could be found. Using numpy.random.binomial may change the RNG state vs. numpy < 1.9 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A bug in one of the algorithms to generate a binomial random variate has been fixed. This change will likely alter the number of random draws performed, and hence the sequence location will be different after a call to distribution.c::rk_binomial_btpe. Any tests which rely on the RNG being in a known state should be checked and/or updated as a result. Random seed enforced to be a 32 bit unsigned integer ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``np.random.seed`` and ``np.random.RandomState`` now throw a ``ValueError`` if the seed cannot safely be converted to 32 bit unsigned integers. Applications that now fail can be fixed by masking the higher 32 bit values to zero: ``seed = seed & 0xFFFFFFFF``. This is what is done silently in older versions so the random stream remains the same. Argmin and argmax out argument ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The ``out`` argument to ``np.argmin`` and ``np.argmax`` and their equivalent C-API functions is now checked to match the desired output shape exactly. If the check fails a ``ValueError`` instead of ``TypeError`` is raised. Einsum ~~~~~~ Remove unnecessary broadcasting notation restrictions. ``np.einsum('ijk,j->ijk', A, B)`` can also be written as ``np.einsum('ij...,j->ij...', A, B)`` (ellipsis is no longer required on 'j') Indexing ~~~~~~~~ The NumPy indexing has seen a complete rewrite in this version. This makes most advanced integer indexing operations much faster and should have no other implications. However some subtle changes and deprecations were introduced in advanced indexing operations: * Boolean indexing into scalar arrays will always return a new 1-d array. This means that ``array(1)[array(True)]`` gives ``array([1])`` and not the original array. * Advanced indexing into one dimensional arrays used to have (undocumented) special handling regarding repeating the value array in assignments when the shape of the value array was too small or did not match. Code using this will raise an error. For compatibility you can use ``arr.flat[index] = values``, which uses the old code branch. (for example ``a = np.ones(10); a[np.arange(10)] = [1, 2, 3]``) * The iteration order over advanced indexes used to be always C-order. In NumPy 1.9. the iteration order adapts to the inputs and is not guaranteed (with the exception of a *single* advanced index which is never reversed for compatibility reasons). This means that the result is undefined if multiple values are assigned to the same element. An example for this is ``arr[[0, 0], [1, 1]] = [1, 2]``, which may set ``arr[0, 1]`` to either 1 or 2. * Equivalent to the iteration order, the memory layout of the advanced indexing result is adapted for faster indexing and cannot be predicted. * All indexing operations return a view or a copy. No indexing operation will return the original array object. (For example ``arr[...]``) * In the future Boolean array-likes (such as lists of python bools) will always be treated as Boolean indexes and Boolean scalars (including python ``True``) will be a legal *boolean* index. At this time, this is already the case for scalar arrays to allow the general ``positive = a[a > 0]`` to work when ``a`` is zero dimensional. * In NumPy 1.8 it was possible to use ``array(True)`` and ``array(False)`` equivalent to 1 and 0 if the result of the operation was a scalar. This will raise an error in NumPy 1.9 and, as noted above, treated as a boolean index in the future. * All non-integer array-likes are deprecated, object arrays of custom integer like objects may have to be cast explicitly. * The error reporting for advanced indexing is more informative, however the error type has changed in some cases. (Broadcasting errors of indexing arrays are reported as ``IndexError``) * Indexing with more then one ellipsis (``...``) is deprecated. Non-integer reduction axis indexes are deprecated ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Non-integer axis indexes to reduction ufuncs like `add.reduce` or `sum` are deprecated. ``promote_types`` and string dtype ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``promote_types`` function now returns a valid string length when given an integer or float dtype as one argument and a string dtype as another argument. Previously it always returned the input string dtype, even if it wasn't long enough to store the max integer/float value converted to a string. ``can_cast`` and string dtype ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``can_cast`` function now returns False in "safe" casting mode for integer/float dtype and string dtype if the string dtype length is not long enough to store the max integer/float value converted to a string. Previously ``can_cast`` in "safe" mode returned True for integer/float dtype and a string dtype of any length. astype and string dtype ~~~~~~~~~~~~~~~~~~~~~~~ The ``astype`` method now returns an error if the string dtype to cast to is not long enough in "safe" casting mode to hold the max value of integer/float array that is being casted. Previously the casting was allowed even if the result was truncated. `npyio.recfromcsv` keyword arguments change ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ `npyio.recfromcsv` no longer accepts the undocumented `update` keyword, which used to override the `dtype` keyword. The ``doc/swig`` directory moved ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The ``doc/swig`` directory has been moved to ``tools/swig``. The ``npy_3kcompat.h`` header changed ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The unused ``simple_capsule_dtor`` function has been removed from ``npy_3kcompat.h``. Note that this header is not meant to be used outside of numpy; other projects should be using their own copy of this file when needed. Negative indices in C-Api ``sq_item`` and ``sq_ass_item`` sequence methods ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ When directly accessing the ``sq_item`` or ``sq_ass_item`` PyObject slots for item getting, negative indices will not be supported anymore. ``PySequence_GetItem`` and ``PySequence_SetItem`` however fix negative indices so that they can be used there. NDIter ~~~~~~ When ``NpyIter_RemoveAxis`` is now called, the iterator range will be reset. When a multi index is being tracked and an iterator is not buffered, it is possible to use ``NpyIter_RemoveAxis``. In this case an iterator can shrink in size. Because the total size of an iterator is limited, the iterator may be too large before these calls. In this case its size will be set to ``-1`` and an error issued not at construction time but when removing the multi index, setting the iterator range, or getting the next function. This has no effect on currently working code, but highlights the necessity of checking for an error return if these conditions can occur. In most cases the arrays being iterated are as large as the iterator so that such a problem cannot occur. This change was already applied to the 1.8.1 release. ``zeros_like`` for string dtypes now returns empty strings ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ To match the `zeros` function `zeros_like` now returns an array initialized with empty strings instead of an array filled with `'0'`. New Features ============ Percentile supports more interpolation options ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``np.percentile`` now has the interpolation keyword argument to specify in which way points should be interpolated if the percentiles fall between two values. See the documentation for the available options. Generalized axis support for median and percentile ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``np.median`` and ``np.percentile`` now support generalized axis arguments like ufunc reductions do since 1.7. One can now say axis=(index, index) to pick a list of axes for the reduction. The ``keepdims`` keyword argument was also added to allow convenient broadcasting to arrays of the original shape. Dtype parameter added to ``np.linspace`` and ``np.logspace`` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The returned data type from the ``linspace`` and ``logspace`` functions can now be specified using the dtype parameter. More general ``np.triu`` and ``np.tril`` broadcasting ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ For arrays with ``ndim`` exceeding 2, these functions will now apply to the final two axes instead of raising an exception. ``tobytes`` alias for ``tostring`` method ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``ndarray.tobytes`` and ``MaskedArray.tobytes`` have been added as aliases for ``tostring`` which exports arrays as ``bytes``. This is more consistent in Python 3 where ``str`` and ``bytes`` are not the same. Build system ~~~~~~~~~~~~ Added experimental support for the ppc64le and OpenRISC architecture. Compatibility to python ``numbers`` module ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ All numerical numpy types are now registered with the type hierarchy in the python ``numbers`` module. ``increasing`` parameter added to ``np.vander`` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The ordering of the columns of the Vandermonde matrix can be specified with this new boolean argument. ``unique_counts`` parameter added to ``np.unique`` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The number of times each unique item comes up in the input can now be obtained as an optional return value. Support for median and percentile in nanfunctions ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The ``np.nanmedian`` and ``np.nanpercentile`` functions behave like the median and percentile functions except that NaNs are ignored. NumpyVersion class added ~~~~~~~~~~~~~~~~~~~~~~~~ The class may be imported from numpy.lib and can be used for version comparison when the numpy version goes to 1.10.devel. For example:: >>> from numpy.lib import NumpyVersion >>> if NumpyVersion(np.__version__) < '1.10.0'): ... print('Wow, that is an old NumPy version!') Allow saving arrays with large number of named columns ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The numpy storage format 1.0 only allowed the array header to have a total size of 65535 bytes. This can be exceeded by structured arrays with a large number of columns. A new format 2.0 has been added which extends the header size to 4 GiB. `np.save` will automatically save in 2.0 format if the data requires it, else it will always use the more compatible 1.0 format. Full broadcasting support for ``np.cross`` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``np.cross`` now properly broadcasts its two input arrays, even if they have different number of dimensions. In earlier versions this would result in either an error being raised, or wrong results computed. Improvements ============ Better numerical stability for sum in some cases ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Pairwise summation is now used in the sum method, but only along the fast axis and for groups of the values <= 8192 in length. This should also improve the accuracy of var and std in some common cases. Percentile implemented in terms of ``np.partition`` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``np.percentile`` has been implemented in terms of ``np.partition`` which only partially sorts the data via a selection algorithm. This improves the time complexity from ``O(nlog(n))`` to ``O(n)``. Performance improvement for ``np.array`` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The performance of converting lists containing arrays to arrays using ``np.array`` has been improved. It is now equivalent in speed to ``np.vstack(list)``. Performance improvement for ``np.searchsorted`` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ For the built-in numeric types, ``np.searchsorted`` no longer relies on the data type's ``compare`` function to perform the search, but is now implemented by type specific functions. Depending on the size of the inputs, this can result in performance improvements over 2x. Optional reduced verbosity for np.distutils ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Set ``numpy.distutils.system_info.system_info.verbosity = 0`` and then calls to ``numpy.distutils.system_info.get_info('blas_opt')`` will not print anything on the output. This is mostly for other packages using numpy.distutils. Covariance check in ``np.random.multivariate_normal`` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A ``RuntimeWarning`` warning is raised when the covariance matrix is not positive-semidefinite. Polynomial Classes no longer template based ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The polynomial classes have been refactored to use an abstract base class rather than a template in order to implement a common interface. This makes importing the polynomial package faster as the classes do not need to be compiled on import. More GIL releases ~~~~~~~~~~~~~~~~~ Several more functions now release the Global Interpreter Lock allowing more efficient parallization using the ``threading`` module. Most notably the GIL is now released for fancy indexing, ``np.where`` and the ``random`` module now uses a per-state lock instead of the GIL. MaskedArray support for more complicated base classes ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Built-in assumptions that the baseclass behaved like a plain array are being removed. In particalur, ``repr`` and ``str`` should now work more reliably. C-API ~~~~~ Deprecations ============ Non-integer scalars for sequence repetition ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Using non-integer numpy scalars to repeat python sequences is deprecated. For example ``np.float_(2) * [1]`` will be an error in the future. ``select`` input deprecations ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The integer and empty input to ``select`` is deprecated. In the future only boolean arrays will be valid conditions and an empty ``condlist`` will be considered an input error instead of returning the default. ``rank`` function ~~~~~~~~~~~~~~~~~ The ``rank`` function has been deprecated to avoid confusion with ``numpy.linalg.matrix_rank``. Object array equality comparisons ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In the future object array comparisons both `==` and `np.equal` will not make use of identity checks anymore. For example: >>> a = np.array([np.array([1, 2, 3]), 1]) >>> b = np.array([np.array([1, 2, 3]), 1]) >>> a == b will consistently return False (and in the future an error) even if the array in `a` and `b` was the same object. The equality operator `==` will in the future raise errors like `np.equal` if broadcasting or element comparisons, etc. fails. Comparison with `arr == None` will in the future do an elementwise comparison instead of just returning False. Code should be using `arr is None`. All of these changes will give Deprecation- or FutureWarnings at this time. C-API ~~~~~ The utility function npy_PyFile_Dup and npy_PyFile_DupClose are broken by the internal buffering python 3 applies to its file objects. To fix this two new functions npy_PyFile_Dup2 and npy_PyFile_DupClose2 are declared in npy_3kcompat.h and the old functions are deprecated. Due to the fragile nature of these functions it is recommended to instead use the python API when possible. This change was already applied to the 1.8.1 release. NumPy 1.8.2 Release Notes ************************* This is a bugfix only release in the 1.8.x series. Issues fixed ============ * gh-4836: partition produces wrong results for multiple selections in equal ranges * gh-4656: Make fftpack._raw_fft threadsafe * gh-4628: incorrect argument order to _copyto in in np.nanmax, np.nanmin * gh-4642: Hold GIL for converting dtypes types with fields * gh-4733: fix np.linalg.svd(b, compute_uv=False) * gh-4853: avoid unaligned simd load on reductions on i386 * gh-4722: Fix seg fault converting empty string to object * gh-4613: Fix lack of NULL check in array_richcompare * gh-4774: avoid unaligned access for strided byteswap * gh-650: Prevent division by zero when creating arrays from some buffers * gh-4602: ifort has issues with optimization flag O2, use O1 NumPy 1.8.1 Release Notes ************************* This is a bugfix only release in the 1.8.x series. Issues fixed ============ * gh-4276: Fix mean, var, std methods for object arrays * gh-4262: remove insecure mktemp usage * gh-2385: absolute(complex(inf)) raises invalid warning in python3 * gh-4024: Sequence assignment doesn't raise exception on shape mismatch * gh-4027: Fix chunked reading of strings longer than BUFFERSIZE * gh-4109: Fix object scalar return type of 0-d array indices * gh-4018: fix missing check for memory allocation failure in ufuncs * gh-4156: high order linalg.norm discards imaginary elements of complex arrays * gh-4144: linalg: norm fails on longdouble, signed int * gh-4094: fix NaT handling in _strided_to_strided_string_to_datetime * gh-4051: fix uninitialized use in _strided_to_strided_string_to_datetime * gh-4093: Loading compressed .npz file fails under Python 2.6.6 * gh-4138: segfault with non-native endian memoryview in python 3.4 * gh-4123: Fix missing NULL check in lexsort * gh-4170: fix native-only long long check in memoryviews * gh-4187: Fix large file support on 32 bit * gh-4152: fromfile: ensure file handle positions are in sync in python3 * gh-4176: clang compatibility: Typos in conversion_utils * gh-4223: Fetching a non-integer item caused array return * gh-4197: fix minor memory leak in memoryview failure case * gh-4206: fix build with single-threaded python * gh-4220: add versionadded:: 1.8.0 to ufunc.at docstring * gh-4267: improve handling of memory allocation failure * gh-4267: fix use of capi without gil in ufunc.at * gh-4261: Detect vendor versions of GNU Compilers * gh-4253: IRR was returning nan instead of valid negative answer * gh-4254: fix unnecessary byte order flag change for byte arrays * gh-3263: numpy.random.shuffle clobbers mask of a MaskedArray * gh-4270: np.random.shuffle not work with flexible dtypes * gh-3173: Segmentation fault when 'size' argument to random.multinomial * gh-2799: allow using unique with lists of complex * gh-3504: fix linspace truncation for integer array scalar * gh-4191: get_info('openblas') does not read libraries key * gh-3348: Access violation in _descriptor_from_pep3118_format * gh-3175: segmentation fault with numpy.array() from bytearray * gh-4266: histogramdd - wrong result for entries very close to last boundary * gh-4408: Fix stride_stricks.as_strided function for object arrays * gh-4225: fix log1p and exmp1 return for np.inf on windows compiler builds * gh-4359: Fix infinite recursion in str.format of flex arrays * gh-4145: Incorrect shape of broadcast result with the exponent operator * gh-4483: Fix commutativity of {dot,multiply,inner}(scalar, matrix_of_objs) * gh-4466: Delay npyiter size check when size may change * gh-4485: Buffered stride was erroneously marked fixed * gh-4354: byte_bounds fails with datetime dtypes * gh-4486: segfault/error converting from/to high-precision datetime64 objects * gh-4428: einsum(None, None, None, None) causes segfault * gh-4134: uninitialized use for for size 1 object reductions Changes ======= NDIter ~~~~~~ When ``NpyIter_RemoveAxis`` is now called, the iterator range will be reset. When a multi index is being tracked and an iterator is not buffered, it is possible to use ``NpyIter_RemoveAxis``. In this case an iterator can shrink in size. Because the total size of an iterator is limited, the iterator may be too large before these calls. In this case its size will be set to ``-1`` and an error issued not at construction time but when removing the multi index, setting the iterator range, or getting the next function. This has no effect on currently working code, but highlights the necessity of checking for an error return if these conditions can occur. In most cases the arrays being iterated are as large as the iterator so that such a problem cannot occur. Optional reduced verbosity for np.distutils ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Set ``numpy.distutils.system_info.system_info.verbosity = 0`` and then calls to ``numpy.distutils.system_info.get_info('blas_opt')`` will not print anything on the output. This is mostly for other packages using numpy.distutils. Deprecations ============ C-API ~~~~~ The utility function npy_PyFile_Dup and npy_PyFile_DupClose are broken by the internal buffering python 3 applies to its file objects. To fix this two new functions npy_PyFile_Dup2 and npy_PyFile_DupClose2 are declared in npy_3kcompat.h and the old functions are deprecated. Due to the fragile nature of these functions it is recommended to instead use the python API when possible.
|
OK, putting this in for now. @juliantaylor This seemed to work for 1.9.2. |
jsonn
pushed a commit
to jsonn/pkgsrc
that referenced
this pull request
Apr 22, 2015
Reviewed by: wiz@ Upstream changes: NumPy 1.9.2 Release Notes ************************* This is a bugfix only release in the 1.9.x series. Issues fixed ============ * `#5316 <https://github.com/numpy/numpy/issues/5316>`__: fix too large dtype alignment of strings and complex types * `#5424 <https://github.com/numpy/numpy/issues/5424>`__: fix ma.median when used on ndarrays * `#5481 <https://github.com/numpy/numpy/issues/5481>`__: Fix astype for structured array fields of different byte order * `#5354 <https://github.com/numpy/numpy/issues/5354>`__: fix segfault when clipping complex arrays * `#5524 <https://github.com/numpy/numpy/issues/5524>`__: allow np.argpartition on non ndarrays * `#5612 <https://github.com/numpy/numpy/issues/5612>`__: Fixes ndarray.fill to accept full range of uint64 * `#5155 <https://github.com/numpy/numpy/issues/5155>`__: Fix loadtxt with comments=None and a string None data * `#4476 <https://github.com/numpy/numpy/issues/4476>`__: Masked array view fails if structured dtype has datetime component * `#5388 <https://github.com/numpy/numpy/issues/5388>`__: Make RandomState.set_state and RandomState.get_state threadsafe * `#5390 <https://github.com/numpy/numpy/issues/5390>`__: make seed, randint and shuffle threadsafe * `#5374 <https://github.com/numpy/numpy/issues/5374>`__: Fixed incorrect assert_array_almost_equal_nulp documentation * `#5393 <https://github.com/numpy/numpy/issues/5393>`__: Add support for ATLAS > 3.9.33. * `#5313 <https://github.com/numpy/numpy/issues/5313>`__: PyArray_AsCArray caused segfault for 3d arrays * `#5492 <https://github.com/numpy/numpy/issues/5492>`__: handle out of memory in rfftf * `#4181 <https://github.com/numpy/numpy/issues/4181>`__: fix a few bugs in the random.pareto docstring * `#5359 <https://github.com/numpy/numpy/issues/5359>`__: minor changes to linspace docstring * `#4723 <https://github.com/numpy/numpy/issues/4723>`__: fix a compile issues on AIX NumPy 1.9.1 Release Notes ************************* This is a bugfix only release in the 1.9.x series. Issues fixed ============ * gh-5184: restore linear edge behaviour of gradient to as it was in < 1.9. The second order behaviour is available via the `edge_order` keyword * gh-4007: workaround Accelerate sgemv crash on OSX 10.9 * gh-5100: restore object dtype inference from iterable objects without `len()` * gh-5163: avoid gcc-4.1.2 (red hat 5) miscompilation causing a crash * gh-5138: fix nanmedian on arrays containing inf * gh-5240: fix not returning out array from ufuncs with subok=False set * gh-5203: copy inherited masks in MaskedArray.__array_finalize__ * gh-2317: genfromtxt did not handle filling_values=0 correctly * gh-5067: restore api of npy_PyFile_DupClose in python2 * gh-5063: cannot convert invalid sequence index to tuple * gh-5082: Segmentation fault with argmin() on unicode arrays * gh-5095: don't propagate subtypes from np.where * gh-5104: np.inner segfaults with SciPy's sparse matrices * gh-5251: Issue with fromarrays not using correct format for unicode arrays * gh-5136: Import dummy_threading if importing threading fails * gh-5148: Make numpy import when run with Python flag '-OO' * gh-5147: Einsum double contraction in particular order causes ValueError * gh-479: Make f2py work with intent(in out) * gh-5170: Make python2 .npy files readable in python3 * gh-5027: Use 'll' as the default length specifier for long long * gh-4896: fix build error with MSVC 2013 caused by C99 complex support * gh-4465: Make PyArray_PutTo respect writeable flag * gh-5225: fix crash when using arange on datetime without dtype set * gh-5231: fix build in c99 mode NumPy 1.9.0 Release Notes ************************* This release supports Python 2.6 - 2.7 and 3.2 - 3.4. Highlights ========== * Numerous performance improvements in various areas, most notably indexing and operations on small arrays are significantly faster. Indexing operations now also release the GIL. * Addition of `nanmedian` and `nanpercentile` rounds out the nanfunction set. Dropped Support =============== * The oldnumeric and numarray modules have been removed. * The doc/pyrex and doc/cython directories have been removed. * The doc/numpybook directory has been removed. * The numpy/testing/numpytest.py file has been removed together with the importall function it contained. Future Changes ============== * The numpy/polynomial/polytemplate.py file will be removed in NumPy 1.10.0. * Default casting for inplace operations will change to 'same_kind' in Numpy 1.10.0. This will certainly break some code that is currently ignoring the warning. * Relaxed stride checking will be the default in 1.10.0 * String version checks will break because, e.g., '1.9' > '1.10' is True. A NumpyVersion class has been added that can be used for such comparisons. * The diagonal and diag functions will return writeable views in 1.10.0 * The `S` and/or `a` dtypes may be changed to represent Python strings instead of bytes, in Python 3 these two types are very different. Compatibility notes =================== The diagonal and diag functions return readonly views. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In NumPy 1.8, the diagonal and diag functions returned readonly copies, in NumPy 1.9 they return readonly views, and in 1.10 they will return writeable views. Special scalar float values don't cause upcast to double anymore ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In previous numpy versions operations involving floating point scalars containing special values ``NaN``, ``Inf`` and ``-Inf`` caused the result type to be at least ``float64``. As the special values can be represented in the smallest available floating point type, the upcast is not performed anymore. For example the dtype of: ``np.array([1.], dtype=np.float32) * float('nan')`` now remains ``float32`` instead of being cast to ``float64``. Operations involving non-special values have not been changed. Percentile output changes ~~~~~~~~~~~~~~~~~~~~~~~~~ If given more than one percentile to compute numpy.percentile returns an array instead of a list. A single percentile still returns a scalar. The array is equivalent to converting the list returned in older versions to an array via ``np.array``. If the ``overwrite_input`` option is used the input is only partially instead of fully sorted. ndarray.tofile exception type ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ All ``tofile`` exceptions are now ``IOError``, some were previously ``ValueError``. Invalid fill value exceptions ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Two changes to numpy.ma.core._check_fill_value: * When the fill value is a string and the array type is not one of 'OSUV', TypeError is raised instead of the default fill value being used. * When the fill value overflows the array type, TypeError is raised instead of OverflowError. Polynomial Classes no longer derived from PolyBase ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ This may cause problems with folks who depended on the polynomial classes being derived from PolyBase. They are now all derived from the abstract base class ABCPolyBase. Strictly speaking, there should be a deprecation involved, but no external code making use of the old baseclass could be found. Using numpy.random.binomial may change the RNG state vs. numpy < 1.9 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A bug in one of the algorithms to generate a binomial random variate has been fixed. This change will likely alter the number of random draws performed, and hence the sequence location will be different after a call to distribution.c::rk_binomial_btpe. Any tests which rely on the RNG being in a known state should be checked and/or updated as a result. Random seed enforced to be a 32 bit unsigned integer ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``np.random.seed`` and ``np.random.RandomState`` now throw a ``ValueError`` if the seed cannot safely be converted to 32 bit unsigned integers. Applications that now fail can be fixed by masking the higher 32 bit values to zero: ``seed = seed & 0xFFFFFFFF``. This is what is done silently in older versions so the random stream remains the same. Argmin and argmax out argument ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The ``out`` argument to ``np.argmin`` and ``np.argmax`` and their equivalent C-API functions is now checked to match the desired output shape exactly. If the check fails a ``ValueError`` instead of ``TypeError`` is raised. Einsum ~~~~~~ Remove unnecessary broadcasting notation restrictions. ``np.einsum('ijk,j->ijk', A, B)`` can also be written as ``np.einsum('ij...,j->ij...', A, B)`` (ellipsis is no longer required on 'j') Indexing ~~~~~~~~ The NumPy indexing has seen a complete rewrite in this version. This makes most advanced integer indexing operations much faster and should have no other implications. However some subtle changes and deprecations were introduced in advanced indexing operations: * Boolean indexing into scalar arrays will always return a new 1-d array. This means that ``array(1)[array(True)]`` gives ``array([1])`` and not the original array. * Advanced indexing into one dimensional arrays used to have (undocumented) special handling regarding repeating the value array in assignments when the shape of the value array was too small or did not match. Code using this will raise an error. For compatibility you can use ``arr.flat[index] = values``, which uses the old code branch. (for example ``a = np.ones(10); a[np.arange(10)] = [1, 2, 3]``) * The iteration order over advanced indexes used to be always C-order. In NumPy 1.9. the iteration order adapts to the inputs and is not guaranteed (with the exception of a *single* advanced index which is never reversed for compatibility reasons). This means that the result is undefined if multiple values are assigned to the same element. An example for this is ``arr[[0, 0], [1, 1]] = [1, 2]``, which may set ``arr[0, 1]`` to either 1 or 2. * Equivalent to the iteration order, the memory layout of the advanced indexing result is adapted for faster indexing and cannot be predicted. * All indexing operations return a view or a copy. No indexing operation will return the original array object. (For example ``arr[...]``) * In the future Boolean array-likes (such as lists of python bools) will always be treated as Boolean indexes and Boolean scalars (including python ``True``) will be a legal *boolean* index. At this time, this is already the case for scalar arrays to allow the general ``positive = a[a > 0]`` to work when ``a`` is zero dimensional. * In NumPy 1.8 it was possible to use ``array(True)`` and ``array(False)`` equivalent to 1 and 0 if the result of the operation was a scalar. This will raise an error in NumPy 1.9 and, as noted above, treated as a boolean index in the future. * All non-integer array-likes are deprecated, object arrays of custom integer like objects may have to be cast explicitly. * The error reporting for advanced indexing is more informative, however the error type has changed in some cases. (Broadcasting errors of indexing arrays are reported as ``IndexError``) * Indexing with more then one ellipsis (``...``) is deprecated. Non-integer reduction axis indexes are deprecated ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Non-integer axis indexes to reduction ufuncs like `add.reduce` or `sum` are deprecated. ``promote_types`` and string dtype ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``promote_types`` function now returns a valid string length when given an integer or float dtype as one argument and a string dtype as another argument. Previously it always returned the input string dtype, even if it wasn't long enough to store the max integer/float value converted to a string. ``can_cast`` and string dtype ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``can_cast`` function now returns False in "safe" casting mode for integer/float dtype and string dtype if the string dtype length is not long enough to store the max integer/float value converted to a string. Previously ``can_cast`` in "safe" mode returned True for integer/float dtype and a string dtype of any length. astype and string dtype ~~~~~~~~~~~~~~~~~~~~~~~ The ``astype`` method now returns an error if the string dtype to cast to is not long enough in "safe" casting mode to hold the max value of integer/float array that is being casted. Previously the casting was allowed even if the result was truncated. `npyio.recfromcsv` keyword arguments change ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ `npyio.recfromcsv` no longer accepts the undocumented `update` keyword, which used to override the `dtype` keyword. The ``doc/swig`` directory moved ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The ``doc/swig`` directory has been moved to ``tools/swig``. The ``npy_3kcompat.h`` header changed ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The unused ``simple_capsule_dtor`` function has been removed from ``npy_3kcompat.h``. Note that this header is not meant to be used outside of numpy; other projects should be using their own copy of this file when needed. Negative indices in C-Api ``sq_item`` and ``sq_ass_item`` sequence methods ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ When directly accessing the ``sq_item`` or ``sq_ass_item`` PyObject slots for item getting, negative indices will not be supported anymore. ``PySequence_GetItem`` and ``PySequence_SetItem`` however fix negative indices so that they can be used there. NDIter ~~~~~~ When ``NpyIter_RemoveAxis`` is now called, the iterator range will be reset. When a multi index is being tracked and an iterator is not buffered, it is possible to use ``NpyIter_RemoveAxis``. In this case an iterator can shrink in size. Because the total size of an iterator is limited, the iterator may be too large before these calls. In this case its size will be set to ``-1`` and an error issued not at construction time but when removing the multi index, setting the iterator range, or getting the next function. This has no effect on currently working code, but highlights the necessity of checking for an error return if these conditions can occur. In most cases the arrays being iterated are as large as the iterator so that such a problem cannot occur. This change was already applied to the 1.8.1 release. ``zeros_like`` for string dtypes now returns empty strings ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ To match the `zeros` function `zeros_like` now returns an array initialized with empty strings instead of an array filled with `'0'`. New Features ============ Percentile supports more interpolation options ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``np.percentile`` now has the interpolation keyword argument to specify in which way points should be interpolated if the percentiles fall between two values. See the documentation for the available options. Generalized axis support for median and percentile ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``np.median`` and ``np.percentile`` now support generalized axis arguments like ufunc reductions do since 1.7. One can now say axis=(index, index) to pick a list of axes for the reduction. The ``keepdims`` keyword argument was also added to allow convenient broadcasting to arrays of the original shape. Dtype parameter added to ``np.linspace`` and ``np.logspace`` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The returned data type from the ``linspace`` and ``logspace`` functions can now be specified using the dtype parameter. More general ``np.triu`` and ``np.tril`` broadcasting ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ For arrays with ``ndim`` exceeding 2, these functions will now apply to the final two axes instead of raising an exception. ``tobytes`` alias for ``tostring`` method ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``ndarray.tobytes`` and ``MaskedArray.tobytes`` have been added as aliases for ``tostring`` which exports arrays as ``bytes``. This is more consistent in Python 3 where ``str`` and ``bytes`` are not the same. Build system ~~~~~~~~~~~~ Added experimental support for the ppc64le and OpenRISC architecture. Compatibility to python ``numbers`` module ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ All numerical numpy types are now registered with the type hierarchy in the python ``numbers`` module. ``increasing`` parameter added to ``np.vander`` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The ordering of the columns of the Vandermonde matrix can be specified with this new boolean argument. ``unique_counts`` parameter added to ``np.unique`` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The number of times each unique item comes up in the input can now be obtained as an optional return value. Support for median and percentile in nanfunctions ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The ``np.nanmedian`` and ``np.nanpercentile`` functions behave like the median and percentile functions except that NaNs are ignored. NumpyVersion class added ~~~~~~~~~~~~~~~~~~~~~~~~ The class may be imported from numpy.lib and can be used for version comparison when the numpy version goes to 1.10.devel. For example:: >>> from numpy.lib import NumpyVersion >>> if NumpyVersion(np.__version__) < '1.10.0'): ... print('Wow, that is an old NumPy version!') Allow saving arrays with large number of named columns ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The numpy storage format 1.0 only allowed the array header to have a total size of 65535 bytes. This can be exceeded by structured arrays with a large number of columns. A new format 2.0 has been added which extends the header size to 4 GiB. `np.save` will automatically save in 2.0 format if the data requires it, else it will always use the more compatible 1.0 format. Full broadcasting support for ``np.cross`` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``np.cross`` now properly broadcasts its two input arrays, even if they have different number of dimensions. In earlier versions this would result in either an error being raised, or wrong results computed. Improvements ============ Better numerical stability for sum in some cases ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Pairwise summation is now used in the sum method, but only along the fast axis and for groups of the values <= 8192 in length. This should also improve the accuracy of var and std in some common cases. Percentile implemented in terms of ``np.partition`` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``np.percentile`` has been implemented in terms of ``np.partition`` which only partially sorts the data via a selection algorithm. This improves the time complexity from ``O(nlog(n))`` to ``O(n)``. Performance improvement for ``np.array`` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The performance of converting lists containing arrays to arrays using ``np.array`` has been improved. It is now equivalent in speed to ``np.vstack(list)``. Performance improvement for ``np.searchsorted`` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ For the built-in numeric types, ``np.searchsorted`` no longer relies on the data type's ``compare`` function to perform the search, but is now implemented by type specific functions. Depending on the size of the inputs, this can result in performance improvements over 2x. Optional reduced verbosity for np.distutils ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Set ``numpy.distutils.system_info.system_info.verbosity = 0`` and then calls to ``numpy.distutils.system_info.get_info('blas_opt')`` will not print anything on the output. This is mostly for other packages using numpy.distutils. Covariance check in ``np.random.multivariate_normal`` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A ``RuntimeWarning`` warning is raised when the covariance matrix is not positive-semidefinite. Polynomial Classes no longer template based ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The polynomial classes have been refactored to use an abstract base class rather than a template in order to implement a common interface. This makes importing the polynomial package faster as the classes do not need to be compiled on import. More GIL releases ~~~~~~~~~~~~~~~~~ Several more functions now release the Global Interpreter Lock allowing more efficient parallization using the ``threading`` module. Most notably the GIL is now released for fancy indexing, ``np.where`` and the ``random`` module now uses a per-state lock instead of the GIL. MaskedArray support for more complicated base classes ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Built-in assumptions that the baseclass behaved like a plain array are being removed. In particalur, ``repr`` and ``str`` should now work more reliably. C-API ~~~~~ Deprecations ============ Non-integer scalars for sequence repetition ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Using non-integer numpy scalars to repeat python sequences is deprecated. For example ``np.float_(2) * [1]`` will be an error in the future. ``select`` input deprecations ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The integer and empty input to ``select`` is deprecated. In the future only boolean arrays will be valid conditions and an empty ``condlist`` will be considered an input error instead of returning the default. ``rank`` function ~~~~~~~~~~~~~~~~~ The ``rank`` function has been deprecated to avoid confusion with ``numpy.linalg.matrix_rank``. Object array equality comparisons ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In the future object array comparisons both `==` and `np.equal` will not make use of identity checks anymore. For example: >>> a = np.array([np.array([1, 2, 3]), 1]) >>> b = np.array([np.array([1, 2, 3]), 1]) >>> a == b will consistently return False (and in the future an error) even if the array in `a` and `b` was the same object. The equality operator `==` will in the future raise errors like `np.equal` if broadcasting or element comparisons, etc. fails. Comparison with `arr == None` will in the future do an elementwise comparison instead of just returning False. Code should be using `arr is None`. All of these changes will give Deprecation- or FutureWarnings at this time. C-API ~~~~~ The utility function npy_PyFile_Dup and npy_PyFile_DupClose are broken by the internal buffering python 3 applies to its file objects. To fix this two new functions npy_PyFile_Dup2 and npy_PyFile_DupClose2 are declared in npy_3kcompat.h and the old functions are deprecated. Due to the fragile nature of these functions it is recommended to instead use the python API when possible. This change was already applied to the 1.8.1 release. NumPy 1.8.2 Release Notes ************************* This is a bugfix only release in the 1.8.x series. Issues fixed ============ * gh-4836: partition produces wrong results for multiple selections in equal ranges * gh-4656: Make fftpack._raw_fft threadsafe * gh-4628: incorrect argument order to _copyto in in np.nanmax, np.nanmin * gh-4642: Hold GIL for converting dtypes types with fields * gh-4733: fix np.linalg.svd(b, compute_uv=False) * gh-4853: avoid unaligned simd load on reductions on i386 * gh-4722: Fix seg fault converting empty string to object * gh-4613: Fix lack of NULL check in array_richcompare * gh-4774: avoid unaligned access for strided byteswap * gh-650: Prevent division by zero when creating arrays from some buffers * gh-4602: ifort has issues with optimization flag O2, use O1 NumPy 1.8.1 Release Notes ************************* This is a bugfix only release in the 1.8.x series. Issues fixed ============ * gh-4276: Fix mean, var, std methods for object arrays * gh-4262: remove insecure mktemp usage * gh-2385: absolute(complex(inf)) raises invalid warning in python3 * gh-4024: Sequence assignment doesn't raise exception on shape mismatch * gh-4027: Fix chunked reading of strings longer than BUFFERSIZE * gh-4109: Fix object scalar return type of 0-d array indices * gh-4018: fix missing check for memory allocation failure in ufuncs * gh-4156: high order linalg.norm discards imaginary elements of complex arrays * gh-4144: linalg: norm fails on longdouble, signed int * gh-4094: fix NaT handling in _strided_to_strided_string_to_datetime * gh-4051: fix uninitialized use in _strided_to_strided_string_to_datetime * gh-4093: Loading compressed .npz file fails under Python 2.6.6 * gh-4138: segfault with non-native endian memoryview in python 3.4 * gh-4123: Fix missing NULL check in lexsort * gh-4170: fix native-only long long check in memoryviews * gh-4187: Fix large file support on 32 bit * gh-4152: fromfile: ensure file handle positions are in sync in python3 * gh-4176: clang compatibility: Typos in conversion_utils * gh-4223: Fetching a non-integer item caused array return * gh-4197: fix minor memory leak in memoryview failure case * gh-4206: fix build with single-threaded python * gh-4220: add versionadded:: 1.8.0 to ufunc.at docstring * gh-4267: improve handling of memory allocation failure * gh-4267: fix use of capi without gil in ufunc.at * gh-4261: Detect vendor versions of GNU Compilers * gh-4253: IRR was returning nan instead of valid negative answer * gh-4254: fix unnecessary byte order flag change for byte arrays * gh-3263: numpy.random.shuffle clobbers mask of a MaskedArray * gh-4270: np.random.shuffle not work with flexible dtypes * gh-3173: Segmentation fault when 'size' argument to random.multinomial * gh-2799: allow using unique with lists of complex * gh-3504: fix linspace truncation for integer array scalar * gh-4191: get_info('openblas') does not read libraries key * gh-3348: Access violation in _descriptor_from_pep3118_format * gh-3175: segmentation fault with numpy.array() from bytearray * gh-4266: histogramdd - wrong result for entries very close to last boundary * gh-4408: Fix stride_stricks.as_strided function for object arrays * gh-4225: fix log1p and exmp1 return for np.inf on windows compiler builds * gh-4359: Fix infinite recursion in str.format of flex arrays * gh-4145: Incorrect shape of broadcast result with the exponent operator * gh-4483: Fix commutativity of {dot,multiply,inner}(scalar, matrix_of_objs) * gh-4466: Delay npyiter size check when size may change * gh-4485: Buffered stride was erroneously marked fixed * gh-4354: byte_bounds fails with datetime dtypes * gh-4486: segfault/error converting from/to high-precision datetime64 objects * gh-4428: einsum(None, None, None, None) causes segfault * gh-4134: uninitialized use for for size 1 object reductions Changes ======= NDIter ~~~~~~ When ``NpyIter_RemoveAxis`` is now called, the iterator range will be reset. When a multi index is being tracked and an iterator is not buffered, it is possible to use ``NpyIter_RemoveAxis``. In this case an iterator can shrink in size. Because the total size of an iterator is limited, the iterator may be too large before these calls. In this case its size will be set to ``-1`` and an error issued not at construction time but when removing the multi index, setting the iterator range, or getting the next function. This has no effect on currently working code, but highlights the necessity of checking for an error return if these conditions can occur. In most cases the arrays being iterated are as large as the iterator so that such a problem cannot occur. Optional reduced verbosity for np.distutils ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Set ``numpy.distutils.system_info.system_info.verbosity = 0`` and then calls to ``numpy.distutils.system_info.get_info('blas_opt')`` will not print anything on the output. This is mostly for other packages using numpy.distutils. Deprecations ============ C-API ~~~~~ The utility function npy_PyFile_Dup and npy_PyFile_DupClose are broken by the internal buffering python 3 applies to its file objects. To fix this two new functions npy_PyFile_Dup2 and npy_PyFile_DupClose2 are declared in npy_3kcompat.h and the old functions are deprecated. Due to the fragile nature of these functions it is recommended to instead use the python API when possible.
This was referenced Sep 22, 2015
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
reduce maximum required alignment to 8 bytes on 32 bit but no sparc and fix alignment flag of string arrays, see commit messages for details