| Age | Commit message (Collapse) | Author | Files | Lines |
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-Fixed piping, implicit multiplication with groups like ⌈⌉, implemented
Iverson brackets.
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* What is new in gsl-2.6:
** add BLAS calls for the following functions:
- gsl_vector_memcpy
- gsl_vector_scale
- gsl_matrix_memcpy
- gsl_matrix_transpose_memcpy
- gsl_matrix_tricpy
- gsl_matrix_transpose_tricpy
** deprecated functions gsl_linalg_complex_householder_hm and
gsl_linalg_complex_householder_mh
** add unit tests for gsl_linalg_symmtd and gsl_linalg_hermtd
** multilarge TSQR algorithm has been converted to use the new Level 3 QR decomposition
** nonlinear least squares Cholesky solver now uses the new Level 3 BLAS
method; the old modified Cholesky solver is still available under
gsl_multifit_nlinear_solver_mcholesky and gsl_multilarge_nlinear_solver_mcholesky
** implemented Level 3 BLAS versions of several linear algebra routines:
- Triangular matrix inversion
- Cholesky decomposition and inversion (real and complex)
- LU decomposition and inversion (real and complex)
- QR decomposition (courtesy of Julien Langou)
- Generalized symmetric/hermitian eigensystem reduction to standard form
** removed deprecated function gsl_linalg_hessenberg()
** renamed gsl_interp2d_eval_e_extrap() to gsl_interp2d_eval_extrap_e()
to match documentation (reported by D. Lebrun-Grandie)
** renamed some of the gsl_sf_hermite functions to be more consistent
with rest of the library, and deprecated old function names
** updated gsl_sf_hermite_func() to use a newer algorithm
due to B. Bunck which is more stable for large x; also added
gsl_sf_hermite_func_fast() which uses the faster Cauchy integral
algorithm in the same paper by Bunck
** add gsl_vector_axpby()
** add un-pivoted LDLT decomposition and its banded
variant (gsl_linalg_ldlt_* and gsl_linalg_ldlt_band_*)
** add binary search tree module (gsl_bst); based on GNU libavl
** remove -u flag to gsl-histogram
** updated spmatrix module
- added routines and data structures for all types (float,uint,char,...)
- added gsl_spmatrix_scale_columns() and gsl_spmatrix_scale_rows()
- added gsl_spmatrix_add_to_dense()
- more efficient reallocation of COO/triplet matrices (no longer rebuilds binary tree)
- enhanced test suite
- added gsl_spmatrix_min_index()
** add routines for banded Cholesky decomposition (gsl_linalg_cholesky_band_*)
** documented gsl_linalg_LQ routines and added gsl_linalg_LQ_lssolve()
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This updates octave and also gets some more recommened dependencies in,
namely qrupdate and Mesalib (for osmesa) and gl2ps as well as the
qscintilla editor. The glpk option is on by default again.
This version of octave comes rather close to a standard build, with
optimzied BLAS and GUI fluff. We are still missing SuiteSparse and
SUNDIALS solvers, see
https://octave.org/doc/v6.2.0/External-Packages.html
PortAudio should also be considered, and LLVM be watched if that
experimental JIT settles in.
Upstream changes since 5.x:
Summary of important user-visible changes for version 6.1.0 (2020-11-26):
------------------------------------------------------------------------
### General improvements
- The `intersect`, `setdiff`, `setxor`, `union`, and `unique` functions
accept a new sorting option `"stable"` which will return output values
in the same order as the input, rather than in ascending order.
- Complex RESTful web services can now be accessed by the `webread` and
`webwrite` functions alongside with the `weboptions` structure. One
major feature is the support for cookies to enable RESTful
communication with the web service.
Additionally, the system web browser can be opened by the `web`
function.
- The `linspace` function now produces symmetrical sequences when the
endpoints are symmetric. This is more intuitive and also compatible
with recent changes made in Matlab R2019b.
- The underlying algorithm of the `rand` function has been changed.
For single precision outputs, the algorithm has been fixed so that it
produces values strictly in the range (0, 1). Previously, it could
occasionally generate the right endpoint value of 1 (See bug #41742).
In addition, the new implementation uses a uniform interval between
floating point values in the range (0, 1) rather than targeting a
uniform density (# of random integers / length along real number
line).
- Numerical integration has been improved. The `quadv` function has
been re-written so that it can compute integrands of periodic
functions. At the same time, performance is better with ~3.5X fewer
function evaluations required. A bug in `quadgk` that caused complex
path integrals specified with `"Waypoints"` to occasionally be
calculated in the opposite direction was fixed.
- The `edit` function option `"editinplace"` now defaults to `true` and
the option `"home"` now defaults to the empty matrix `[]`. Files will
no longer be copied to the user's HOME directory for editing. The old
behavior can be restored by setting `"editinplace"` to `false` and
`"home"` to `"~/octave"`.
- The `format` command supports two new options: `uppercase` and
`lowercase` (default). With the default, print a lowercase 'e' for
the exponent character in scientific notation and lowercase 'a-f' for
the hex digits representing 10-15. With `uppercase`, print 'E' and
'A-F' instead. The previous uppercase formats, `E` and `G`, no longer
control the case of the output.
Additionally, the `format` command can be called with multiple options
for controlling the format, spacing, and case in arbitrary order.
For example:
format long e uppercase loose
Note, in the case of multiple competing format options the rightmost
one is used, and, in case of an error, the previous format remains
unchanged.
- L-value references (e.g., increment (++), decrement (--), and all
in-place assignment operators (+=, -=, *=, /=, etc.)) are no longer
allowed in anonymous functions.
- New warnings have been added about questionable uses of the colon ':'
range operator. Each has a new warning ID so that it can be disabled
if desired.
> `Octave:colon-complex-argument` : when any arg is complex
> `Octave:colon-nonscalar-argument` : when any arg is non-scalar
- The `regexp` and related functions now correctly handle and *require*
strings in UTF-8 encoding. As with any other function that requires
strings to be encoded in Octave's native encoding, you can use
`native2unicode` to convert from your preferred locale. For example,
the copyright symbol in UTF-8 is `native2unicode (169, "latin1")`.
- The startup file `octaverc` can now be located in the platform
dependent location for user local configuration files (e.g.,
${XDG_CONFIG_HOME}/octave/octaverc on Unix-like operating systems or
%APPDATA%\octave\octaverc on Windows).
- `pkg describe` now lists dependencies and inverse dependencies
(i.e., other installed packages that depend on the package in
question).
- `pkg test` now tests all functions in a package.
- When unloading a package, `pkg` now checks if any remaining loaded
packages depend on the one to be removed. If this is the case `pkg`
aborts with an explanatory error message. This behavior can be
overridden with the `-nodeps` option.
- The command
dbstop in CLASS at METHOD
now works to set breakpoints in classdef constructors and methods.
#### Graphics backend
- The use of Qt4 for graphics and the GUI is deprecated in Octave
version 6 and no further bug fixes will be made. Qt4 support will be
removed completely in Octave version 7.
- The `legend` function has been entirely rewritten. This fixes a
number of historical bugs, and also implements new properties such as
`"AutoUpdate"` and `"NumColumns"`. The gnuplot toolkit---which is no
longer actively maintained---still uses the old legend function.
- The `axis` function was updated which resolved 10 bugs affecting
axes to which `"equal"` had been applied.
- Graphic primitives now accept a color property value of `"none"`
which is useful when a particular primitive needs to be hidden
(for example, the Y-axis of an axes object with `"ycolor" = "none"`)
without hiding the entire primitive `"visibility" = "off"`.
- A new property `"FontSmoothing"` has been added to text and axes
objects that controls whether anti-aliasing is used during the
rendering of characters. The default is `"on"` which produces smooth,
more visually appealing text.
- The figure property `"windowscrollwheelfcn"`is now implemented.
This makes it possible to provide a callback function to be executed
when users manipulate the mouse wheel on a given figure.
- The figure properties `"pointer"`, `"pointershapecdata"`, and
`"pointershapehotspot"` are now implemented. This makes it possible
to change the shape of the cursor (pointer in Matlab-speak) displayed
in a plot window.
- The figure property `"paperpositionmode"` now has the default `"auto"`
rather than `"manual"`. This change is more intuitive and is
Matlab compatible.
- The appearance of patterned lines `"LineStyle" = ":"|"--"|"-."` has
been improved for small widths (`"LineWidth"` less than 1.5 pixels)
which is a common scenario.
- Printing to EPS files now uses a tight bounding box (`"-tight"`
argument to print) by default. This makes more sense for EPS
files which are normally embedded within other documents, and is
Matlab compatible. If necessary use the `"-loose"` option to
reproduce figures as they appeared in previous versions of Octave.
- The following print devices are no longer officially supported: cdr,
corel, aifm, ill, cgm, hpgl, mf and dxf. A warning will be thrown
when using those devices, and the code for supporting those formats
will eventually be removed from a future version of Octave.
- The placement of text subscripts and superscripts has been
re-engineered and now produces visually attractive results similar to
Latex.
### Matlab compatibility
- The function `unique` now returns column index vectors for the second
and third outputs. When duplicate values are present, the default
index to return is now the `"first"` occurrence. The previous Octave
behavior, or Matlab behavior from releases prior to R2012b, can be
obtained by using the `"legacy"` flag.
- The function `setdiff` with the `"rows"` argument now returns Matlab
compatible results. The previous Octave behavior, or Matlab behavior
from releases prior to R2012b, can be obtained by using the `"legacy"`
flag.
- The functions `intersect`, `setxor`, and `union` now accept a
`"legacy"` flag which changes the index values (second and third
outputs) as well as the orientation of all outputs to match Matlab
releases prior to R2012b.
- The function `streamtube` is Matlab compatible and plots tubes along
streamlines which are scaled by the vector field divergence. The
Octave-only extension `ostreamtube` can be used to visualize the flow
expansion and contraction of the vector field due to the local
crossflow divergence.
- The interpreter now supports handles to nested functions.
- The graphics properties `"LineWidth"` and `"MarkerSize"` are now
measured in points, *not* pixels. Compared to previous versions
of Octave, some lines and markers will appear 4/3 larger.
- The meta.class property "SuperClassList" has been renamed
"Superclasslist" for Matlab compatibility. The original name will
exist as an alias until Octave version 8.1.
- Inline functions created by the function `inline` are now of type
"inline" when interrogated with the `class` function. In previous
versions of Octave, the class returned was "function_handle". This
change is Matlab compatible. Inline functions are deprecated in
both Matlab and Octave and support may eventually be removed.
Anonymous functions can be used to replace all instances of inline
functions.
- The function `javaaddpath` now prepends new directories to the
existing dynamic classpath by default. To append them instead, use
the new `"-end"` argument. Multiple directories may now be specified
in a cell array of strings.
- An undocumented function `gui_mainfcn` has been added, for compatibility
with figures created with Matlab's GUIDE.
- Several validator functions of type `mustBe*` have been added. See
the list of new functions below.
### Alphabetical list of new functions added in Octave 6
* `auto_repeat_debug_command`
* `commandhistory`
* `commandwindow`
* `filebrowser`
* `is_same_file`
* `lightangle`
* `mustBeFinite`
* `mustBeGreaterThan`
* `mustBeGreaterThanOrEqual`
* `mustBeInteger`
* `mustBeLessThan`
* `mustBeLessThanOrEqual`
* `mustBeMember`
* `mustBeNegative`
* `mustBeNonempty`
* `mustBeNonNan`
* `mustBeNonnegative`
* `mustBeNonpositive`
* `mustBeNonsparse`
* `mustBeNonzero`
* `mustBeNumeric`
* `mustBeNumericOrLogical`
* `mustBePositive`
* `mustBeReal`
* `namedargs2cell`
* `newline`
* `ode23s`
* `ostreamtube`
* `rescale`
* `rotx`
* `roty`
* `rotz`
* `stream2`
* `stream3`
* `streamline`
* `streamtube`
* `uisetfont`
* `verLessThan`
* `web`
* `weboptions`
* `webread`
* `webwrite`
* `workspace`
### Deprecated functions and properties
The following functions and properties have been deprecated in Octave 6
and will be removed from Octave 8 (or whatever version is the second
major release after 6):
- Functions
Function | Replacement
-----------------------|------------------
`runtests` | `oruntests`
- Properties
Object | Property | Value
-----------------|---------------|------------
| |
- The environment variable used by `mkoctfile` for linker flags is now
`LDFLAGS` rather than `LFLAGS`. `LFLAGS` is deprecated, and a warning
is emitted if it is used, but it will continue to work.
### Removed functions and properties
The following functions and properties were deprecated in Octave 4.4
and have been removed from Octave 6.
- Functions
Function | Replacement
---------------------|------------------
`chop` | `sprintf` for visual results
`desktop` | `isguirunning`
`tmpnam` | `tempname`
`toascii` | `double`
`java2mat` | `__java2mat__`
- Properties
Object | Property | Value
---------------------|---------------------------|-----------------------
`annotation` | `edgecolor ("rectangle")` |
`axes` | `drawmode` |
`figure` | `doublebuffer` |
| `mincolormap` |
| `wvisual` |
| `wvisualmode` |
| `xdisplay` |
| `xvisual` |
| `xvisualmode` |
`line` | `interpreter` |
`patch` | `interpreter` |
`surface` | `interpreter` |
`text` | `fontweight` | `"demi"` and `"light"`
`uibuttongroup` | `fontweight` | `"demi"` and `"light"`
`uicontrol` | `fontweight` | `"demi"` and `"light"`
`uipanel` | `fontweight` | `"demi"` and `"light"`
`uitable` | `fontweight` | `"demi"` and `"light"`
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It is wrong to disable OpenMP and this setting does nothing anyway.
Maybe it did in the past. Now, the build tries to use OpenMP if
possible and this is the right thing to do.
Repeat: This change doesn't affect the build at all since that variable
is not checked (since some time?).
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(pkgsrc changes)
- Add TEST_DEPENDS+, but still one missing is there
(upstream changes)
# vctrs 0.3.8
* Compatibility with next version of rlang.
# vctrs 0.3.7
* `vec_ptype_abbr()` gains arguments to control whether to indicate
named vectors with a prefix (`prefix_named`) and indicate shaped
vectors with a suffix (`suffix_shape`) (#781, @krlmlr).
* `vec_ptype()` is now an optional _performance_ generic. It is not necessary
to implement, but if your class has a static prototype, you might consider
implementing a custom `vec_ptype()` method that returns a constant to
improve performance in some cases (such as common type imputation).
* New `vec_detect_complete()`, inspired by `stats::complete.cases()`. For most
vectors, this is identical to `!vec_equal_na()`. For data frames and
matrices, this detects rows that only contain non-missing values.
* `vec_order()` can now order complex vectors (#1330).
* Removed dependency on digest in favor of `rlang::hash()`.
* Fixed an issue where `vctrs_rcrd` objects were not being proxied correctly
when used as a data frame column (#1318).
* `register_s3()` is now licensed with the "unlicense" which makes it very
clear that it's fine to copy and paste into your own package
(@maxheld83, #1254).
# vctrs 0.3.6
* Fixed an issue with tibble 3.0.0 where removing column names with
`names(x) <- NULL` is now deprecated (#1298).
* Fixed a GCC 11 issue revealed by CRAN checks.
# vctrs 0.3.5
* New experimental `vec_fill_missing()` for filling in missing values with
the previous or following value. It is similar to `tidyr::fill()`, but
also works with data frames and has an additional `max_fill` argument to
limit the number of sequential missing values to fill.
* New `vec_unrep()` to compress a vector with repeated values. It is very
similar to run length encoding, and works nicely alongside `vec_rep_each()`
as a way to invert the compression.
* `vec_cbind()` with only empty data frames now preserves the common size of
the inputs in the result (#1281).
* `vec_c()` now correctly returns a named result with named empty inputs
(#1263).
* vctrs has been relicensed as MIT (#1259).
* Functions that make comparisons within a single vector, such as
`vec_unique()`, or between two vectors, such as `vec_match()`, now
convert all character input to UTF-8 before making comparisons (#1246).
* New `vec_identify_runs()` which returns a vector of identifiers for the
elements of `x` that indicate which run of repeated values they fall in
(#1081).
* Fixed an encoding translation bug with lists containing data frames which
have columns where `vec_size()` is different from the low level
`Rf_length()` (#1233).
# vctrs 0.3.4
* Fixed a GCC sanitiser error revealed by CRAN checks.
# vctrs 0.3.3
* The `table` class is now implemented as a wrapper type that
delegates its coercion methods. It used to be restricted to integer
tables (#1190).
* Named one-dimensional arrays now behave consistently with simple
vectors in `vec_names()` and `vec_rbind()`.
* `new_rcrd()` now uses `df_list()` to validate the fields. This makes
it more flexible as the fields can now be of any type supported by
vctrs, including data frames.
* Thanks to the previous change the `[[` method of records now
preserves list fields (#1205).
* `vec_data()` now preserves data frames. This is consistent with the
notion that data frames are a primitive vector type in vctrs. This
shouldn't affect code that uses `[[` and `length()` to manipulate
the data. On the other hand, the vctrs primitives like `vec_slice()`
will now operate rowwise when `vec_data()` returns a data frame.
* `outer` is now passed unrecycled to name specifications. Instead,
the return value is recycled (#1099).
* Name specifications can now return `NULL`. The names vector will
only be allocated if the spec function returns non-`NULL` during the
concatenation. This makes it possible to ignore outer names without
having to create an empty names vector when there are no inner
names:
```
zap_outer_spec <- function(outer, inner) if (is_character(inner)) inner
# `NULL` names rather than a vector of ""
names(vec_c(a = 1:2, .name_spec = zap_outer_spec))
#> NULL
# Names are allocated when inner names exist
names(vec_c(a = 1:2, c(b = 3L), .name_spec = zap_outer_spec))
#> [1] "" "" "b"
```
* Fixed several performance issues in `vec_c()` and `vec_unchop()`
with named vectors.
* The restriction that S3 lists must have a list-based proxy to be considered
lists by `vec_is_list()` has been removed (#1208).
* New performant `data_frame()` constructor for creating data frames in a way
that follows tidyverse semantics. Among other things, inputs are recycled
using tidyverse recycling rules, strings are never converted to factors,
list-columns are easier to create, and unnamed data frame input is
automatically spliced.
* New `df_list()` for safely and consistently constructing the data structure
underlying a data frame, a named list of equal-length vectors. It is useful
in combination with `new_data_frame()` for creating user-friendly
constructors for data frame subclasses that use the tidyverse rules for
recycling and determining types.
* Fixed performance issue with `vec_order()` on classed vectors which
affected `dplyr::group_by()` (tidyverse/dplyr#5423).
* `vec_set_names()` no longer alters the input in-place (#1194).
* New `vec_proxy_order()` that provides an ordering proxy for use in
`vec_order()` and `vec_sort()`. The default method falls through to
`vec_proxy_compare()`. Lists are special cased, and return an integer
vector proxy that orders by first appearance.
* List columns in data frames are no longer comparable through `vec_compare()`.
* The experimental `relax` argument has been removed from
`vec_proxy_compare()`.
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No changelog nor release note. Here are quote from commit messages.
1.2.9 (2021-05-21)
* Use encoding on regexp
* Remove invalid worksheet characters
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-Minor bug fixes
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Ellipsis 0.3.2
* Compatibility with next version of rlang.
* Changed license to MIT (#39).
----------------------------------------------------------------------
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This includes a rework of our patchery with the hope of upstreaming a good deal
of it.
These are the upstream changes since 0.3.10:
Version 0.3.15
2-May-2021
common:
- imported improvements and bugfixes from Reference-LAPACK 3.9.1
- imported LAPACKE interface fixes from Reference-LAPACK PRs 534 + 537
- fixed a problem in the cpu detection of 0.3.14 that prevented cross-compilation
- fixed a sequence problem in the generation of softlinks to the library in GMAKE
RISC V:
- fixed compilation on RISCV (missing entry in getarch)
- fixed a potential division by zero in CROTG and ZROTG
POWER:
- fixed LAPACK testsuite failures seen with the NVIDIA HPC compiler
- improved CGEMM, DGEMM and ZGEMM performance on POWER10
- added an optimized ZGEMV kernel for POWER10
- fixed a potential division by zero in CROTG and ZROTG
x86_64:
- added support for Intel Control-flow Enforcement Technology (CET)
- reverted the DOMATCOPY_RT code to the generic C version
- fixed a bug in the AVX512 SGEMM kernel introduced in 0.3.14
- fixed misapplication of -msse flag to non-SSE cpus in DYNAMIC_ARCH
- added support for compilation of the benchmarks on older OSX versions
- fix propagation of the NO_AVX512 option in CMAKE builds
- fix compilation of the AVX512 SGEMM kernel with clang-cl on Windows
- fixed compilation of the CTESTs with INTERFACE64=1 (random faults on OSX)
- corrected the Haswell DROT kernel to require AVX2/FMA3 rather than AVX512
ARM:
- fixed a potential division by zero in CROTG and ZROTG
- fixed a potential overflow in IMATCOPY/ZIMATCOPY and the CTESTs
ARM64:
- fixed spurious reads outside the array in the SGEMM tcopy macro
- fixed a potential division by zero in CROTG and ZROTG
- fixed a segmentation fault in DYNAMIC_ARCH builds (reappeared in 0.3.14)
MIPS
- fixed a potential division by zero in CROTG and ZROTG
- fixed a potential overflow in IMATCOPY/ZIMATCOPY and the CTESTs
MIPS64:
- fixed a potential division by zero in CROTG and ZROTG
SPARC:
- fixed a potential division by zero in CROTG and ZROTG
====================================================================
Version 0.3.14
17-Mar-2021
common:
* Fixed a race condition on thread shutdown in non-OpenMP builds
* Fixed custom BUFFERSIZE option getting ignored in gmake builds
* Fixed CMAKE compilation of the TRMM kernels for GENERIC platforms
* Added CBLAS interfaces for CROTG, ZROTG, CSROT and ZDROT
* Improved performance of OMATCOPY_RT across all platforms
* Changed perl scripts to use env instead of a hardcoded /usr/bin/perl
* Fixed potential misreading of the GCC compiler version in the build scripts
* Fixed convergence problems in LAPACK complex GGEV/GGES (Reference-LAPACK #477)
* Reduced the stacksize requirements for running the LAPACK testsuite (Reference-LAPACK #335)
RISCV:
* Fixed compilation on RISCV (missing entry in getarch)
POWER:
* Fixed compilation for DYNAMIC_ARCH with clang and with old gcc versions
* Added support for compilation on FreeBSD/ppc64le
* Added optimized POWER10 kernels for SSCAL, DSCAL, CSCAL, ZSCAL
* Added optimized POWER10 kernels for SROT, DROT, CDOT, SASUM, DASUM
* Improved SSWAP, DSWAP, CSWAP, ZSWAP performance on POWER10
* Improved SCOPY and CCOPY performance on POWER10
* Improved SGEMM and DGEMM performance on POWER10
* Added support for compilation with the NVIDIA HPC compiler
x86_64:
* Added an optimized bfloat16 GEMM kernel for Cooperlake
* Added CPUID autodetection for Intel Rocket Lake and Tiger Lake cpus
* Improved the performance of SASUM,DASUM,SROT,DROT on AMD Ryzen cpus
* Added support for compilation with the NAG Fortran compiler
* Fixed recognition of the AMD AOCC compiler
* Fixed compilation for DYNAMIC_ARCH with clang on Windows
* Added support for running the BLAS/CBLAS tests on Windows
* Fixed signatures of the tls callback functions for Windows x64
* Fixed various issues with fma intrinsics support handling
ARM:
* Added support for embedded Cortex M targets via a new option EMBEDDED
ARMV8:
* Fixed the THUNDERX2T99 and NEOVERSEN1 DNRM2/ZNRM2 kernels for inputs with Inf
* Added support for the DYNAMIC_LIST option
* Added support for compilation with the NVIDIA HPC compiler
* Added support for compiling with the NAG Fortran compiler
====================================================================
Version 0.3.13
12-Dec-2020
common:
* Added a generic bfloat16 SBGEMV kernel
* Fixed a potentially severe memory leak after fork in OpenMP builds
that was introduced in 0.3.12
* Added detection of the Fujitsu Fortran compiler
* Added detection of the (e)gfortran compiler on OpenBSD
* Added support for overriding the default name of the library independently
from symbol suffixing in the gmake builds (already supported in cmake)
RISCV:
* Added a RISC V port optimized for C910V
POWER:
* Added optimized POWER10 kernels for SAXPY, CAXPY, SDOT, DDOT and DGEMV_N
* Improved DGEMM performance on POWER10
* Improved STRSM and DTRSM performance on POWER9 and POWER10
* Fixed segmemtation faults in DYNAMIC_ARCH builds
* Fixed compilation with the PGI compiler
x86:
* Fixed compilation of kernels that require SSE2 intrinsics since 0.3.12
x86_64:
* Added an optimized bfloat16 SBGEMV kernel for SkylakeX and Cooperlake
* Improved the performance of SASUM and DASUM kernels through parallelization
* Improved the performance of SROT and DROT kernels
* Improved the performance of multithreaded xSYRK
* Fixed OpenMP builds that use the LLVM Clang compiler together with GNU gfortran
(where linking of both the LLVM libomp and GNU libgomp could lead to lockups or
wrong results)
* Fixed miscompilations by old gcc 4.6
* Fixed misdetection of AVX2 capability in some Sandybridge cpus
* Fixed lockups in builds combining DYNAMIC_ARCH with TARGET=GENERIC on OpenBSD
ARM64:
* Fixed segmemtation faults in DYNAMIC_ARCH builds
MIPS:
* Improved kernels for Loongson 3R3 ("3A") and 3R4 ("3B") models, including MSA
* Fixed bugs in the MSA kernels for CGEMM, CTRMM, CGEMV and ZGEMV
* Added handling of zero increments in the MSA kernels for SSWAP and DSWAP
* Added DYNAMIC_ARCH support for MIPS64 (currently Loongson3R3/3R4 only)
SPARC:
* Fixed building 32 and 64 bit SPARC kernels with the SolarisStudio compilers
====================================================================
Version 0.3.12
24-Oct-2020
common:
* Fixed missing BLAS/LAPACK functions (inadvertently dropped during
the build system restructuring)
* Fixed argument conversion macro in LAPACKE_zgesvdq (LAPACK #458)
POWER:
* Added optimized SCOPY/CCOPY kernels for POWER10
* Increased and unified the default size of the GEMM BUFFER
* Fixed building for POWER10 in DYNAMIC_ARCH mode
* POWER10 compatibility test now checks binutils version as well
* Cleaned up compiler warnings
x86_64:
* corrected compiler version checks for AVX2 compatibility
* added compiler option -mavx2 for building with flang
* fixed direct SGEMM pathway for small matrix sizes (broken by
the code refactoring in 0.3.11)
* fixed unhandled partial register clobbers in several kernels
for AXPY,DOT,GEMV_N and GEMV_T flagged by gcc10 tree-vectorizer
ARMV8:
* improved Apple Vortex support to include cross-compiling
====================================================================
Version 0.3.11
17-Oct-2020
common:
* API change:
the newly added BFLOAT16 functions were renamed to use the
letter "B" instead of "H" to avoid potential confusion with
the IEEE "half precision float" type, i.e. the 0.3.10
SHGEMM is now SBGEMM and the corresponding build option
was changed from "BUILD_HALF" to "BUILD_BFLOAT16".
* Reduced the default BLAS3_MEM_ALLOC_THRESHOLD (used as an upper
limit for placing temporary arrays on the stack) to be compatible
with a stack size of 1mb (as imposed by the JAVA runtime library)
* Added mixed-precision dot function SBDOT and utility functions
shstobf16, shdtobf16, sbf16tos and dbf16tod to convert between
single or double precision float arrays and bfloat16 arrays
* Fixed prototypes of LAPACK_?ggsvp and LAPACK_?ggsvd functions
in lapack.h
* Fixed underflow and rounding errors in LAPACK SLANV2 and DLANV2
(causing miscalculations in e.g. SHSEQR/DHSEQR, LAPACK issue #263)
* Fixed workspace calculation in LAPACK ?GELQ (LAPACK issue #415)
* Fixed several bugs in the LAPACK testsuite
* Improved performance of TRMM and TRSM for certain problem sizes
* Fixed infinite recursions and workspace miscalculations in ReLAPACK
* CMAKE builds no longer require pkg-config for creating the .pc file
* Makefile builds no longer misread NO_CBLAS=0 or NO_LAPACK=0 as
enabling these options
* Fixed detection of gfortran when invoked through an mpi wrapper
* Improve thread reinitialization performance with OpenMP after a fork
* Added support for building only the subset of the library required
for a particular precision by specifying BUILD_SINGLE, BUILD_DOUBLE
* Optional function name prefixes and suffixes are now correctly
reflected in the generated cblas.h
* Added CMAKE build support for the LAPACK and multithreading tests
POWER:
* Added optimized support for POWER10
* Added support for compiling for POWER8 in 32bit mode
* Added support for compilation with LLVM/clang
* Added support for compilation with NVIDIA/PGI compilers
* Fixed building on big-endian POWER8
* Fixed miscompilation of ZDOTC by gcc10
* Fixed alignment errors in the POWER8 SAXPY kernel
* Improved CPU detection on AIX
* Supported building with older compilers on POWER9
x86_64:
* Added support for Intel Cooperlake
* Added autodetection of AMD Renoir/Matisse/Zen3 cpus
* Added autodetection of Intel Comet Lake cpus
* Reimplemented ?sum, ?dot and daxpy using universal intrinsics
* Reset the fpu state before using the fpu on Windows as a workaround
for a problem introduced in Windows 10 build 19041 (a.k.a. SDK 2004)
* Fixed potentially undefined behaviour in the dot and gemv_t kernels
* Fixed a potential segmentation fault in DYNAMIC_ARCH builds
* Fixed building for ZEN with PGI/NVIDIA and AMD AOCC compilers
ARMV7:
* Fixed cpu detection on BSD-like systems
ARMV8:
* Added preliminary support for Apple Vortex cpus
* Added support for the Cavium ThunderX3T110 cpu
* Fixed cpu detection on BSD-like systems
* Fixed compilation in -std=C18 mode
IBM Z:
* Added support for compiling with the clang compiler
* Improved GEMM performance on Z14
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This is scheduled to be a dependency for math/octave to support the
named operations.
Qrupdate is a linear algebra library for fast updating of QR and Cholesky
decompositions.
Supported operations:
- QR rank-1 update (qr1up)
- QR column insert (qrinc)
- QR column delete (qrdec)
- QR column shift (qrshc)
- QR row insert (qrinr)
- QR row delete (qrder)
- Cholesky rank-1 update (ch1up)
- Cholesky rank-1 downdate (ch1dn)
- Cholesky symmetric insert (chinx)
- Cholesky symmetric insert (chdex)
- Cholesky symmetric shift (chshx)
- LU rank-1 update (lu1up)
- LU pivoted rank-1 update (lup1up)
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-Adjusted estimation and rounding to include imaginary numbers
-Division with complex numbers
-Fixed negative scientific notation
-Basics of complex numbers
-Made sum() and ans compatible with complex numbers
-Implemented complex variants of prelude functions
-Allow a comma before 'dx' in integrals
-Always round values <= 10^-16 down to zero
-Finding square roots for estimate()
-Created synonym 'integral' for 'integrate'
-Convert fract to f64 before turning into string in estimate()
-Avoid panic because of invalid number literal
-Fixed integration with expressions like xdx
-Fixed rounding for complex numbers resulting in 0
-Integration with complex numbers
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v0.18.2 (19 May 2021)
---------------------
This release reverts a regression in xarray's unstacking of dask-backed arrays.
v0.18.1 (18 May 2021)
---------------------
This release is intended as a small patch release to be compatible with the new
2021.5.0 ``dask.distributed`` release. It also includes a new
``drop_duplicates`` method, some documentation improvements, the beginnings of
our internal Index refactoring, and some bug fixes.
New Features
- Implement :py:meth:`DataArray.drop_duplicates`
to remove duplicate dimension values (:pull:`5239`).
- Allow passing ``combine_attrs`` strategy names to the ``keep_attrs`` parameter of
:py:func:`apply_ufunc` (:pull:`5041`)
- :py:meth:`Dataset.interp` now allows interpolation with non-numerical datatypes,
such as booleans, instead of dropping them. (:issue:`4761` :pull:`5008`).
- Raise more informative error when decoding time variables with invalid reference dates.
(:issue:`5199`, :pull:`5288`).
Bug fixes
- Opening netCDF files from a path that doesn't end in ``.nc`` without supplying
an explicit ``engine`` works again (:issue:`5295`), fixing a bug introduced in
0.18.0.
Documentation
- Clean up and enhance docstrings for the :py:class:`DataArray.plot` and ``Dataset.plot.*``
families of methods (:pull:`5285`).
- Explanation of deprecation cycles and how to implement them added to contributors
guide. (:pull:`5289`)
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0.4.1
=====
-Use KalkNum's to_string() function in to_scientific_notation()
-kalk_web: Added integral and estimation support
-Combined to_scientific_notation() methods for both types, and added types,
and added tests
-Added wasm binding to KalkNum.estimate()
0.4.0
=====
-Fixed mod.rs errors for when rug is not used, and added some unit tests
-Estimation/rounding for final results
-Lex special symbols as one token
-Basic rounding for calculus functions
-Higher order derivatation
-Improved accuracy for derivation
-Basics of derivation
-Created 'Identifier' struct that contains prime count and name
-Fixed integrate function test
-Lex '**' as power sign
-Switched to Simpson's rule (composite, 3/8) for integration
-Fixed "dx" in integrals, and created calculus.rs
-Integration estimation
-Fixed zeroes being trimmed for non-rug numbers
-kalk: Fixed type error in kalk_num/regular.rs
-Trimming trailing zeroes for non-rug numbers
-Fixed xy^z precedence, from (xy)^2 to x(y^2)
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This added a rather irrelevant local search path and just polluted
the patch with a local directory from by builds.
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the package previously used PKG_OPTIONS for this, but PKG_OPTIONS
are harmful in the case that they effect the resulting ABI of
library packages. this way, things that actually need fftwl and fftwq
can depend on these sub-packages.
this also fixes fftwq on NetBSD by making it pull in libquadmath.
another thing about PKG_OPTIONS for library components is that
they mean certain components don't get tested...
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GCC Quad-Precision Math Library
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test suite runs on mac mini g4.
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linker
This was lost on the recent rework of the patches:
On NetBSD.
In PKGSRC_FORTRAM=gfortran case, libcblas has no RPATH=/usr/pkg/gccXX/lib
and libgfortran and libquadmath are not found.
In PKGSRC_FORTRAN=g95 case, libcblas has no
RPATH=/usr/pkg/lib/gcc-lib/x86_64--netbsd/4.1.2 and libf95 is not found.
Use Fortran compiler as linker instread of C compiler to fix link.
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This includes a rework of the build system patches, which I'll try
to push upstream …
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1.8:
Backwards compatibility breaks and deprecations
Please manually add any backwards compatibility breaks or deprecations here, in addition to the automatic listing below.
assumptions
AskHandler(), register_handler() and remove_handler() are deprecated. Handler now must be multipledispatch instance.
parsing
Parsing of "Q" returns AssumptionKeys instance in assumptions module. This means that sympify("Q") will no longer return a symbol.
Changes
assumptions
Q.infinite now correctly evaluates to True for oo, -oo, and zoo.
Assumption predicates now correctly evaluates to None for S.NaN.
Relational objects do not need to be wrapped by Q.is_true to be asked or refined anymore
Q.is_true wrapping over AppliedPredicate now just return the argument.
refine arg(x) when x is real and nonzero
assumptions/relation module is introduced. This module implements binary relation as predicate.
AskHandler(), register_handler() and remove_handler() are deprecated. Handler now must be multipledispatch instance.
Predicate now uses a single handler which is multipledispatch instance.
Predicate can now take multiple arguments.
Predicate("...") now returns UndefinedPredicate instance. To define a predicate, you must make a subclass of Predicate.
calculus
Using maximum with a piecewise expression over a domain no longer fails due to a bug fix in Piecewise.as_expr_set_pairs.
codegen
allowing for multi-dimensional arrays as arguments/locals in c code generation
create_expand_pow_optimization is now customizable with respect to requirement on base.
Support flattening of elementwise additions of array expressions.
Fixes to array-expressions in order to properly work with ZeroArray and ZeroMatrix.
Fixing matrix expression recognition from array-expressions.
Minor fixes to the way the AST of array expressions is built
Add normalization of CodegenArrayDiagonal when it's nested with CodegenArrayPermuteDims and CodegenArrayContraction.
Increased support for the normalization of array expressions and permutations of indices.
parse_matrix_expression( ) is now able to parse traces of matrices.
combinatorics
Added a section to the permutation docs about containment in permutation groups.
concrete
Improved infinite summation capability by adding residue formula.
A bug leading to incorrect evaluation of a summation of an exponential function was fixed.
core
Fixed a bug in Pow._eval_nseries that added Order terms to exact expansions
Fixed a bug in Expr.round that could lead to infinite recursion in integrate.
Removed deprecated ClassRegistry
get_integer_part no longer has a threshold on the approximation to closest integer based on difference, allowing floor to give more accurate results for smaller evalf precisions also
A bug causing match to fail for expressions with different signs was fixed. Previously this resulted in solve raising an exception for some inputs.
Make S(0.0) == S.false return False
.refine() method is moved from Expr to Basic.
gcd correctly handles unevaluated Mul
Fixed a bug leading to infinite recursion in the old assumptions under evaluate(False).
Fixed _eval_is_zero() functionality when imaginary numbers are involved.
Kind classification of objects is introduced. This feature is experimental, and can be replaced or deleted in the future.
Make class Eq with sets as arguments work with simplify().
Fixed a few broken cases of expr.is_integer
functions
Implemented Riemann Xi function
riemaan xi function
Added nseries expansion for besselj and bessely
Fixed leading term calculation of sin functions to handle angles outside (-pi, pi)
Added aseries expansion to error functions
Changes _eval_nseries of Abs to no longer return a Piecewise
Modified _eval_nseries to handle infinity and added _eval_as_leading_term in floor and ceiling
Added Generalized Incomplete, Generalized Regularized and Central Beta functions
Added _eval_nseries support to sign
Fixed assumption is_algebraic for exponentials with rational multiples of I*pi to be True.
geometry
Fix AssertError for vertical tangent
Geometric entities with symbolic coordinates will not be printed in SVG.
integrals
Fixed a bug that led to RecursionError in integrals involving hyperbolic functions.
The heurisch integration method was made faster by improvements in the sparse linear systems solver.
A bug leading to incorrect results when integrating Piecewise expressions where a condition simplifies to True was fixed.
logic
simplify_logic faster in most cases, especially for larger expressions.
refine() on Boolean objects reduces them to true or false if the truth value can be determined.
matrices
Fixed a bug that led to the wrong derivative result in matrix expressions.
The eye and zero functions have been made much faster for large matrices.
Added two new functions upper_triangular and lower_triangular, that return upper and lower triangular parts of a matrix.
Minus one, integers, rational numbers multiplied with MatAdd is automatically distributed.
Added function returning Wilkinson matrix
Implemented Singular Value decomposition for matrices
Implemented Upper Hessenberg Decomposition for a matrix
eigenvals, eigenvects without radical solution will be returned as CRootOf
Added function to calculate Generalized Schur Complement for Block Matrices
Added functions to compute LDU, UDL and LU decompositions for Block Matrices
Fixed issues with dot product for Matrix.orthogonalize with complex vectors.
Fixed zero division issues for Matrix.QRdecomposition with zero columns coming first than nonzero columns.
Added a function to compute the permanent of a matrix
Changed behaviour of eq() of class DenseMatrix
det has a new option 'gauss-ge' which is much faster in many cases
ntheory
Added documentation of ecm and qs functions
Fixed a bug in the is_gaussian_prime function for python complex numbers (e.g. 1+1j).
primerange now accepts a single argument i.e., primerange(input_arg) is valid and is same as primerange(2, input_arg).
Added motzkin numbers
parsing
Fixed issue with parsing logarithm bases without curly braces
Fix parse_expr parsing of expressions with methods when using the implicit_multiplications transformation.
Include the transformed code in the error message when the evaluation in parse_expr fails.
Extended the LaTeX parser with support for complex conjugates (via \overline{...}).
Latex parser does not evaluate sqrt expressions anymore.
physics.continuum_mechanics
make beam module compute correctly internal forces
physics.optics
Fixed bugs related to basic operations on TWave
physics.quantum
WignerD now evaluates to KroneckerDelta in some cases.
physics.units
Fix bug when input argument to a function is an integer
Change default behavior for functions (all function arguments must be dimensionless by default)
sin, cos, tan, cot, sec, and csc functions may have a dimensionless or angle input argument
Exponents must now be dimensionless
Constants such as pi and E are now treated as dimensionless (raised exception previously)
Numbers with an imaginary component are now treated as dimensionless (raised exception previously)
Fixed a bug with derived units and dimensions in check_dimensions.
Fix bug in convert_to returning wrong units in some cases where the linear equation system between canonical units is unsolvable.
physics.vector
Fix documentation for v1pt_theory
Introduced new methods on ReferenceFrame: .orient_axis(), .orient_explicit(), .orient_body_fixed(), .orient_space_fixed(), and .orient_quaternion(). .orient() calls out to each new method and it is recommended to use the new methods.
Added .xreplace() to Vector Class.
Added .xreplace() to Dyadic Class.
Added .evalf() to Vector class
Added .evalf() to Dyadic class
plotting
Added handling for OverflowError (when plotting functions like exp(1/x)).
polys
Added internal representation as both dense and sparse matrix
Added docstrings for Domain Matrix class
Add zeros method to DomainMatrix
A new sparse implementation of DomainMatrix is added.
make is_disjoint strict so that inequalities evaluated with solve() return consistent results
The DomainMatrix class has moved from sympy.polys.domainmatrix to sympy.polys.matrices and should now be imported as from sympy.polys.matrices import DomainMatrix.
A new polys FiniteExtension domain is added.
numberfields: implemented new algorithm for primitive_element in case ex=True.
added boilerplate index method for FracField
Solved bug in Poly.replace
Solve a bug in polytools.degree.
Use assumption system instead of structural equality check in __bool__ method of Expression domain element (fixing cases where Poly(...).is_zero would incorrectly return False)
printing
The pretty printer was made faster when printing large sequences (e.g. tuples, sets etc).
Fixed a bug which led to latex printing error in singularity function expressions.
Replaced the Theano printer with an Aesara printer
Symbols with Unicode character names and no underscores, like ω0 now properly pretty print subscripts.
Fix the printing of the vertical bar in ImageSet, ConditionSet, and ComplexRegion so that it is the full height in the pretty and LaTeX printers.
Fix the tag for the degree of a root with a rational base in MathML output.
irrational powers are no longer printed with square root sign, they are printed as fractional powers
Allow spreading assignments across multiple symbols when printing multi-member objects.
Support various array constructor types when printing arrays to GLSL.
Fixes a bug when printing negative expressions to GLSL with operators printed as functions.
Support a custom 0 substitution for printing expressions representing various GLSL types.
make cxxcode correctly print the first argument of Min/Max functions
sets
Added basic denesting functionaility for sets of the form ConditionSet(x, Contains(x, ...)).
ConditionSet.contains(x) now returns False if x is not in the base set (even if its substitution into the condition will cause an error).
FiniteSet.evalf with a subs argument now does the substitution. Previously, the argument was ignored.
Add .simplify to FiniteSet.
Make 'is_subset' work for ProductSet
changed behavior of Rationals.contains(float) to indeterminate
tests modified to include new behavior
.evalf() precisions with x and FiniteSet(x) is same now.
simplify
Fix simplify calls sympify without rational parameter
TRmorrie now takes powers of cos terms into account
solvers
Fixed a bug in solve that expanded hyperbolic function constants to equivalent exp form.
Handle x**r=0 case in invert_complex
Fixed a bug in solveset, which led to infinite recursion for solving some expressions involving radicals.
The new sparse DomainMatrix implementation is used in linsolve to make it much faster when solving large sparse systems of linear equations.
Modified symbols sorting in solvers._solve_system to ensure solve and linsolve solve the same way
Added solver for 2nd order nonlinear autonomous ODE.
speed improvement in a substep of rsolve_hyper (when computing constant solutions to constant coefficient recurrences).
Fixed incorrect solutions from rsolve for higher order recurrences
stats
Refactory and simplification of sampling backends for random variables.
Expectation can now be calculated across multiple Uniform RVs evaluating to zero
Implemented Matrix Student's t-distribution
Fixed simplification bug in Stochastic Processes by introducing abstract Distribution class
API changed for StochasticProcess.distribution which now expects a timestamp argument instead of RandomIndexedSymbol object.
Implemented FlorySchulz Distribution
implemented LogCauchy Distribution
Implemented Logit-Normal probability distribution
Fixes cdf computation of Discrete random variables by using integer limits
Added 2 new distributions in frv_types.
added support for fundamental matrix for regular markov chains
Added support for multiple RandomIndexedSymbols in DiscreteMarkovChain
tensor
Introduced objects ArraySymbol and ArrayElement for array expressions equivalent to MatrixSymbol and MatrixElement in the matrix expression module.
shape() function is introduced in array module.
Add class ZeroArray for array expressions of zero-valued elements.
Make Array differentiation(derive_by_array) work with non sympy expressions.
Added tensordiagonal( ) function to perform diagonalization of array expressions.
Adding an array with any other type now consistently gives NotImplemented.
utilities
Added official support for using CuPy to GPU accelerate lambdify functions.
Added Replacer class to simplify the creation of replacement expressions with MatchPy.
Added tests for optional parameter in MatchPy patterns.
Added string printers for MatchPy-compatible wildcards in sympy.utilities.matchpy_connector
Added WildDot, WildPlus and WildStar classes to MatchPy connector. These classes correspond to the dot, dot-plut and dot-star expressions in regular expression, but operate on SymPy expression trees and are aware of associative and commutative properties, features supported through the MatchPy library.
minlex no longer accepts is_set or small arguments
minlex and least_rotation now accept key= arguments similar to sorted.
vector
Fixed a bug with integral over ImplicitRegion objects
other
Expanding documentation to include all class members with docstrings
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--1.2.0--
Released February 1, 2021
Features and optimizations:
* Support @ operator for matrix multiplication (Max Gaukler)
* Add eta() implementing the Dedekind eta function
* Optimized the python_trailing function (adhoc-king)
* Implement unary plus for matrices (Max Gaukler)
* Improved calculation of gram_index (p15-git-acc)
Compatibility:
* Enable sage backend by default only if SAGE_ROOT is set (Pauli Virtanen)
* Fix syntax warnings on CPython 3.8 (Sergey B Kirpichev)
* Changed version requirements to Python 2.7 and 3.4 or later
(Sergey B Kirpichev)
* Improvements to the setup and test code (Sergey B Kirpichev)
* Fix sys.version comparisons for compatibility with Python 3.10 (Jakub Wilk)
* Fixes to Python2/3 compatibility for printing (Christian Clauss)
Bug fixes:
* Fix a possible division by zero in shanks() (Pascal Hebbeker)
* Fixed indexing errors in deHoog, Knight & Stokes inverse laplace
transform algorithm (Kris Kuhlman)
* Corrected branch cuts of the elliprj() function in some cases
* Fix initialization of iv.matrix from non-interval matrix (Max Gaukler)
* Preserve function signatures in PrecisionManager (Viet Tran)
* Implemented float and complex conversions for ivmpf
(Jonathan Warner)
* Fixed issue with scalar-matrix multiplication for interval matrices
(Jonathan Warner)
* Fix estimation of quadrature error with multiple subintervals (Tom Minka)
* Fixed a problem with the defun decorators (Sergey B Kirpichev)
* Fix eigenvalue sorting by absolute value (Georg Ostrovski)
Cleanup:
* Documentation corrections (Paul Masson, S.Y. Lee)
* Remove inaccessible logic in fsum/fdot (Sergey B Kirpichev)
* Remove broken force_type option for matrix constructor (Max Gaukler)
* Fix text of the BSD license in LICENSE (Sergey B Kirpichev)
* Minor code cleanup (Frédéric Chapoton)
* Removed old, unused code
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1.20.3:
BUG: Correct ``datetime64`` missing type overload for ``datetime.date``
MAINT: Remove ``__all__`` in favor of explicit re-exports
BLD: Strip extra newline when dumping gfortran version on MacOS
BUG: fix segfault in object/longdouble operations
MAINT: Use towncrier build explicitly
MAINT: Relax certain integer-type constraints
MAINT: Remove unsafe unions and ABCs from return-annotations
MAINT: Allow more recursion depth for scalar tests.
BUG: Initialize the full nditer buffer in case of error
BLD: remove unnecessary flag ``-faltivec`` on macOS
MAINT, CI: treats _SIMD module build warnings as errors through...
BUG: for MINGW, threads.h existence test requires GLIBC > 2.12
BUG: Make changelog recognize gh- as a PR number prefix.
REL, DOC: Prepare for the NumPy 1.20.3 release.
BUG: Fix failing mypy test in 1.20.x.
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Fixes build errors of the form
/tmp/pkgsrc/math/arpack-ng/work.x86_64/arpack-ng-3.7.0/SRC/cnaitr.f:666:35:
383 | call svout (logfil, 1, rnorm, ndigit,
| 2
......
666 | call svout (logfil, 2, rtemp, ndigit,
| 1
Error: Rank mismatch between actual argument at (1) and actual argument at (2) (scalar and rank-1)
seen in arpack-ng-3.7.0nb1
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v0.18.0 (6 May 2021)
This release brings a few important performance improvements, a wide range of usability upgrades, lots of bug fixes, and some new features. These include a plugin API to add backend engines, a new theme for the documentation, curve fitting methods, and several new plotting functions.
v0.17.0 (24 Feb 2021)
This release brings a few important performance improvements, a wide range of usability upgrades, lots of bug fixes, and some new features. These include better cftime support, a new quiver plot, better unstack performance, more efficient memory use in rolling operations, and some python packaging improvements. We also have a few documentation improvements (and more planned!).
v0.16.2 (30 Nov 2020)
This release brings the ability to write to limited regions of zarr files, open zarr files with :py:func:`open_dataset` and :py:func:`open_mfdataset`, increased support for propagating attrs using the keep_attrs flag, as well as numerous bugfixes and documentation improvements.
v0.16.1 (2020-09-20)
This patch release fixes an incompatibility with a recent pandas change, which was causing an issue indexing with a datetime64. It also includes improvements to rolling, to_dataframe, cov & corr methods and bug fixes. Our documentation has a number of improvements, including fixing all doctests and confirming their accuracy on every commit.
v0.16.0 (2020-07-11)
This release adds xarray.cov & xarray.corr for covariance & correlation respectively; the idxmax & idxmin methods, the polyfit method & xarray.polyval for fitting polynomials, as well as a number of documentation improvements, other features, and bug fixes. Many thanks to all 44 contributors who contributed to this release:
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version 1.5.6 (tag v1.5.6rel)
=============================
* move CI/CD tests from travis/appveyor to Github Actions.
* move netCDF4 dir under src so module can be imported in source directory.
* change numpy.bool to numpy.bool_ and numpy.float to numpy.float_ (float and
bool are deprecated in numpy 1.20)
* clean up docstrings so that they work with latest pdoc.
* update cython numpy API to remove deprecation warnings.
* Add "fromcdl" and "tocdl" Dataset methods for import/export of CDL
via ncdump/ncgen called externally via the subprocess module.
* remove python 2.7 support.
* broadcast data (if possible)to conform to variable shape when writing to a slice
version 1.5.5.1 (tag v1.5.5.1rel)
=================================
* rebuild binary wheels for linux and OSX to link netcdf-c 4.7.4 and hdf5 1.12.0.
version 1.5.5 (tag v1.5.5rel)
=============================
* have setup.py always try use nc-config first to find paths to netcdf and
hdf5 libraries and headers. Don't use pkg-config to find HDF5 if HDF5 env
vars are set (or read from setup.cfg).
* Change MIT license text to standard OSI wording.
version 1.5.4 (tag v1.5.4rel)
=============================
* fix printing of variable objects for variables that end with the letter 'u'
* make sure root group has 'name' attribute.
* add the ability to pack vlen floats to integers using
scale_factor/add_offset
* use len instead of deprecated numpy.alen
* check size on valid_range instead of using len.
* add `set_chunk_cache/get_chunk_cache` module functions to reset the
default chunk cache sizes before opening a Dataset.
* replace use of numpy's deprecated tostring() method with tobytes()
* bump minimal numpy version to 1.9 (first version to have tobytes()).
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What's new in 1.2.4 (April 12, 2021)
Fixed regressions
- Fixed regression in :meth:`DataFrame.sum` when ``min_count`` greater than the :class:`DataFrame` shape was passed resulted in a ``ValueError`` (:issue:`39738`)
- Fixed regression in :meth:`DataFrame.to_json` raising ``AttributeError`` when run on PyPy (:issue:`39837`)
- Fixed regression in (in)equality comparison of ``pd.NaT`` with a non-datetimelike numpy array returning a scalar instead of an array (:issue:`40722`)
- Fixed regression in :meth:`DataFrame.where` not returning a copy in the case of an all True condition (:issue:`39595`)
- Fixed regression in :meth:`DataFrame.replace` raising ``IndexError`` when ``regex`` was a multi-key dictionary (:issue:`39338`)
- Fixed regression in repr of floats in an ``object`` column not respecting ``float_format`` when printed in the console or outputted through :meth:`DataFrame.to_string`, :meth:`DataFrame.to_html`, and :meth:`DataFrame.to_latex` (:issue:`40024`)
- Fixed regression in NumPy ufuncs such as ``np.add`` not passing through all arguments for :class:`DataFrame`
What's new in 1.2.3 (March 02, 2021)
Fixed regressions
- Fixed regression in :meth:`~DataFrame.to_excel` raising ``KeyError`` when giving duplicate columns with ``columns`` attribute (:issue:`39695`)
- Fixed regression in nullable integer unary ops propagating mask on assignment (:issue:`39943`)
- Fixed regression in :meth:`DataFrame.__setitem__` not aligning :class:`DataFrame` on right-hand side for boolean indexer (:issue:`39931`)
- Fixed regression in :meth:`~DataFrame.to_json` failing to use ``compression`` with URL-like paths that are internally opened in binary mode or with user-provided file objects that are opened in binary mode (:issue:`39985`)
- Fixed regression in :meth:`Series.sort_index` and :meth:`DataFrame.sort_index`, which exited with an ungraceful error when having kwarg ``ascending=None`` passed. Passing ``ascending=None`` is still considered invalid, and the improved error message suggests a proper usage (``ascending`` must be a boolean or a list-like of boolean) (:issue:`39434`)
- Fixed regression in :meth:`DataFrame.transform` and :meth:`Series.transform` giving incorrect column labels when passed a dictionary with a mix of list and non-list values (:issue:`40018`)
What's new in 1.2.2 (February 09, 2021)
---------------------------------------
These are the changes in pandas 1.2.2. See :ref:`release` for a full changelog
including other versions of pandas.
{{ header }}
.. ---------------------------------------------------------------------------
.. _whatsnew_122.regressions:
Fixed regressions
~~~~~~~~~~~~~~~~~
- Fixed regression in :func:`read_excel` that caused it to raise ``AttributeError`` when checking version of older xlrd versions (:issue:`38955`)
- Fixed regression in :class:`DataFrame` constructor reordering element when construction from datetime ndarray with dtype not ``"datetime64[ns]"`` (:issue:`39422`)
- Fixed regression in :meth:`DataFrame.astype` and :meth:`Series.astype` not casting to bytes dtype (:issue:`39474`)
- Fixed regression in :meth:`~DataFrame.to_pickle` failing to create bz2/xz compressed pickle files with ``protocol=5`` (:issue:`39002`)
- Fixed regression in :func:`pandas.testing.assert_series_equal` and :func:`pandas.testing.assert_frame_equal` always raising ``AssertionError`` when comparing extension dtypes (:issue:`39410`)
- Fixed regression in :meth:`~DataFrame.to_csv` opening ``codecs.StreamWriter`` in binary mode instead of in text mode and ignoring user-provided ``mode`` (:issue:`39247`)
- Fixed regression in :meth:`Categorical.astype` casting to incorrect dtype when ``np.int32`` is passed to dtype argument (:issue:`39402`)
- Fixed regression in :meth:`~DataFrame.to_excel` creating corrupt files when appending (``mode="a"``) to an existing file (:issue:`39576`)
- Fixed regression in :meth:`DataFrame.transform` failing in case of an empty DataFrame or Series (:issue:`39636`)
- Fixed regression in :meth:`~DataFrame.groupby` or :meth:`~DataFrame.resample` when aggregating an all-NaN or numeric object dtype column (:issue:`39329`)
- Fixed regression in :meth:`.Rolling.count` where the ``min_periods`` argument would be set to ``0`` after the operation (:issue:`39554`)
- Fixed regression in :func:`read_excel` that incorrectly raised when the argument ``io`` was a non-path and non-buffer and the ``engine`` argument was specified (:issue:`39528`)
.. ---------------------------------------------------------------------------
.. _whatsnew_122.bug_fixes:
Bug fixes
~~~~~~~~~
- :func:`pandas.read_excel` error message when a specified ``sheetname`` does not exist is now uniform across engines (:issue:`39250`)
- Fixed bug in :func:`pandas.read_excel` producing incorrect results when the engine ``openpyxl`` is used and the excel file is missing or has incorrect dimension information; the fix requires ``openpyxl`` >= 3.0.0, prior versions may still fail (:issue:`38956`, :issue:`39001`)
- Fixed bug in :func:`pandas.read_excel` sometimes producing a ``DataFrame`` with trailing rows of ``np.nan`` when the engine ``openpyxl`` is used (:issue:`39181`)
What's new in 1.2.1 (January 20, 2021)
--------------------------------------
These are the changes in pandas 1.2.1. See :ref:`release` for a full changelog
including other versions of pandas.
{{ header }}
.. ---------------------------------------------------------------------------
.. _whatsnew_121.regressions:
Fixed regressions
~~~~~~~~~~~~~~~~~
- Fixed regression in :meth:`~DataFrame.to_csv` that created corrupted zip files when there were more rows than ``chunksize`` (:issue:`38714`)
- Fixed regression in :meth:`~DataFrame.to_csv` opening ``codecs.StreamReaderWriter`` in binary mode instead of in text mode (:issue:`39247`)
- Fixed regression in :meth:`read_csv` and other read functions were the encoding error policy (``errors``) did not default to ``"replace"`` when no encoding was specified (:issue:`38989`)
- Fixed regression in :func:`read_excel` with non-rawbyte file handles (:issue:`38788`)
- Fixed regression in :meth:`DataFrame.to_stata` not removing the created file when an error occured (:issue:`39202`)
- Fixed regression in ``DataFrame.__setitem__`` raising ``ValueError`` when expanding :class:`DataFrame` and new column is from type ``"0 - name"`` (:issue:`39010`)
- Fixed regression in setting with :meth:`DataFrame.loc` raising ``ValueError`` when :class:`DataFrame` has unsorted :class:`MultiIndex` columns and indexer is a scalar (:issue:`38601`)
- Fixed regression in setting with :meth:`DataFrame.loc` raising ``KeyError`` with :class:`MultiIndex` and list-like columns indexer enlarging :class:`DataFrame` (:issue:`39147`)
- Fixed regression in :meth:`~DataFrame.groupby()` with :class:`Categorical` grouping column not showing unused categories for ``grouped.indices`` (:issue:`38642`)
- Fixed regression in :meth:`.GroupBy.sem` where the presence of non-numeric columns would cause an error instead of being dropped (:issue:`38774`)
- Fixed regression in :meth:`.DataFrameGroupBy.diff` raising for ``int8`` and ``int16`` columns (:issue:`39050`)
- Fixed regression in :meth:`DataFrame.groupby` when aggregating an ``ExtensionDType`` that could fail for non-numeric values (:issue:`38980`)
- Fixed regression in :meth:`.Rolling.skew` and :meth:`.Rolling.kurt` modifying the object inplace (:issue:`38908`)
- Fixed regression in :meth:`DataFrame.any` and :meth:`DataFrame.all` not returning a result for tz-aware ``datetime64`` columns (:issue:`38723`)
- Fixed regression in :meth:`DataFrame.apply` with ``axis=1`` using str accessor in apply function (:issue:`38979`)
- Fixed regression in :meth:`DataFrame.replace` raising ``ValueError`` when :class:`DataFrame` has dtype ``bytes`` (:issue:`38900`)
- Fixed regression in :meth:`Series.fillna` that raised ``RecursionError`` with ``datetime64[ns, UTC]`` dtype (:issue:`38851`)
- Fixed regression in comparisons between ``NaT`` and ``datetime.date`` objects incorrectly returning ``True`` (:issue:`39151`)
- Fixed regression in calling NumPy :func:`~numpy.ufunc.accumulate` ufuncs on DataFrames, e.g. ``np.maximum.accumulate(df)`` (:issue:`39259`)
- Fixed regression in repr of float-like strings of an ``object`` dtype having trailing 0's truncated after the decimal (:issue:`38708`)
- Fixed regression that raised ``AttributeError`` with PyArrow versions [0.16.0, 1.0.0) (:issue:`38801`)
- Fixed regression in :func:`pandas.testing.assert_frame_equal` raising ``TypeError`` with ``check_like=True`` when :class:`Index` or columns have mixed dtype (:issue:`39168`)
We have reverted a commit that resulted in several plotting related regressions in pandas 1.2.0 (:issue:`38969`, :issue:`38736`, :issue:`38865`, :issue:`38947` and :issue:`39126`).
As a result, bugs reported as fixed in pandas 1.2.0 related to inconsistent tick labeling in bar plots are again present (:issue:`26186` and :issue:`11465`)
What's new in 1.2.0 (December 26, 2020)
Performance improvements
- Performance improvements when creating DataFrame or Series with dtype ``str`` or :class:`StringDtype` from array with many string elements (:issue:`36304`, :issue:`36317`, :issue:`36325`, :issue:`36432`, :issue:`37371`)
- Performance improvement in :meth:`.GroupBy.agg` with the ``numba`` engine (:issue:`35759`)
- Performance improvements when creating :meth:`Series.map` from a huge dictionary (:issue:`34717`)
- Performance improvement in :meth:`.GroupBy.transform` with the ``numba`` engine (:issue:`36240`)
- :class:`.Styler` uuid method altered to compress data transmission over web whilst maintaining reasonably low table collision probability (:issue:`36345`)
- Performance improvement in :func:`to_datetime` with non-ns time unit for ``float`` ``dtype`` columns (:issue:`20445`)
- Performance improvement in setting values on an :class:`IntervalArray` (:issue:`36310`)
- The internal index method :meth:`~Index._shallow_copy` now makes the new index and original index share cached attributes, avoiding creating these again, if created on either. This can speed up operations that depend on creating copies of existing indexes (:issue:`36840`)
- Performance improvement in :meth:`.RollingGroupby.count` (:issue:`35625`)
- Small performance decrease to :meth:`.Rolling.min` and :meth:`.Rolling.max` for fixed windows (:issue:`36567`)
- Reduced peak memory usage in :meth:`DataFrame.to_pickle` when using ``protocol=5`` in python 3.8+ (:issue:`34244`)
- Faster ``dir`` calls when the object has many index labels, e.g. ``dir(ser)`` (:issue:`37450`)
- Performance improvement in :class:`ExpandingGroupby` (:issue:`37064`)
- Performance improvement in :meth:`Series.astype` and :meth:`DataFrame.astype` for :class:`Categorical` (:issue:`8628`)
- Performance improvement in :meth:`DataFrame.groupby` for ``float`` ``dtype`` (:issue:`28303`), changes of the underlying hash-function can lead to changes in float based indexes sort ordering for ties (e.g. :meth:`Index.value_counts`)
- Performance improvement in :meth:`pd.isin` for inputs with more than 1e6 elements (:issue:`36611`)
- Performance improvement for :meth:`DataFrame.__setitem__` with list-like indexers (:issue:`37954`)
- :meth:`read_json` now avoids reading entire file into memory when chunksize is specified (:issue:`34548`)
Bug fixes
Categorical
- :meth:`Categorical.fillna` will always return a copy, validate a passed fill value regardless of whether there are any NAs to fill, and disallow an ``NaT`` as a fill value for numeric categories (:issue:`36530`)
- Bug in :meth:`Categorical.__setitem__` that incorrectly raised when trying to set a tuple value (:issue:`20439`)
- Bug in :meth:`CategoricalIndex.equals` incorrectly casting non-category entries to ``np.nan`` (:issue:`37667`)
- Bug in :meth:`CategoricalIndex.where` incorrectly setting non-category entries to ``np.nan`` instead of raising ``TypeError`` (:issue:`37977`)
- Bug in :meth:`Categorical.to_numpy` and ``np.array(categorical)`` with tz-aware ``datetime64`` categories incorrectly dropping the time zone information instead of casting to object dtype (:issue:`38136`)
Datetime-like
- Bug in :meth:`DataFrame.combine_first` that would convert datetime-like column on other :class:`DataFrame` to integer when the column is not present in original :class:`DataFrame` (:issue:`28481`)
- Bug in :attr:`.DatetimeArray.date` where a ``ValueError`` would be raised with a read-only backing array (:issue:`33530`)
- Bug in ``NaT`` comparisons failing to raise ``TypeError`` on invalid inequality comparisons (:issue:`35046`)
- Bug in :class:`.DateOffset` where attributes reconstructed from pickle files differ from original objects when input values exceed normal ranges (e.g. months=12) (:issue:`34511`)
- Bug in :meth:`.DatetimeIndex.get_slice_bound` where ``datetime.date`` objects were not accepted or naive :class:`Timestamp` with a tz-aware :class:`.DatetimeIndex` (:issue:`35690`)
- Bug in :meth:`.DatetimeIndex.slice_locs` where ``datetime.date`` objects were not accepted (:issue:`34077`)
- Bug in :meth:`.DatetimeIndex.searchsorted`, :meth:`.TimedeltaIndex.searchsorted`, :meth:`PeriodIndex.searchsorted`, and :meth:`Series.searchsorted` with ``datetime64``, ``timedelta64`` or :class:`Period` dtype placement of ``NaT`` values being inconsistent with NumPy (:issue:`36176`, :issue:`36254`)
- Inconsistency in :class:`.DatetimeArray`, :class:`.TimedeltaArray`, and :class:`.PeriodArray` method ``__setitem__`` casting arrays of strings to datetime-like scalars but not scalar strings (:issue:`36261`)
- Bug in :meth:`.DatetimeArray.take` incorrectly allowing ``fill_value`` with a mismatched time zone (:issue:`37356`)
- Bug in :class:`.DatetimeIndex.shift` incorrectly raising when shifting empty indexes (:issue:`14811`)
- :class:`Timestamp` and :class:`.DatetimeIndex` comparisons between tz-aware and tz-naive objects now follow the standard library ``datetime`` behavior, returning ``True``/``False`` for ``!=``/``==`` and raising for inequality comparisons (:issue:`28507`)
- Bug in :meth:`.DatetimeIndex.equals` and :meth:`.TimedeltaIndex.equals` incorrectly considering ``int64`` indexes as equal (:issue:`36744`)
- :meth:`Series.to_json`, :meth:`DataFrame.to_json`, and :meth:`read_json` now implement time zone parsing when orient structure is ``table`` (:issue:`35973`)
- :meth:`astype` now attempts to convert to ``datetime64[ns, tz]`` directly from ``object`` with inferred time zone from string (:issue:`35973`)
- Bug in :meth:`.TimedeltaIndex.sum` and :meth:`Series.sum` with ``timedelta64`` dtype on an empty index or series returning ``NaT`` instead of ``Timedelta(0)`` (:issue:`31751`)
- Bug in :meth:`.DatetimeArray.shift` incorrectly allowing ``fill_value`` with a mismatched time zone (:issue:`37299`)
- Bug in adding a :class:`.BusinessDay` with nonzero ``offset`` to a non-scalar other (:issue:`37457`)
- Bug in :func:`to_datetime` with a read-only array incorrectly raising (:issue:`34857`)
- Bug in :meth:`Series.isin` with ``datetime64[ns]`` dtype and :meth:`.DatetimeIndex.isin` incorrectly casting integers to datetimes (:issue:`36621`)
- Bug in :meth:`Series.isin` with ``datetime64[ns]`` dtype and :meth:`.DatetimeIndex.isin` failing to consider tz-aware and tz-naive datetimes as always different (:issue:`35728`)
- Bug in :meth:`Series.isin` with ``PeriodDtype`` dtype and :meth:`PeriodIndex.isin` failing to consider arguments with different ``PeriodDtype`` as always different (:issue:`37528`)
- Bug in :class:`Period` constructor now correctly handles nanoseconds in the ``value`` argument (:issue:`34621` and :issue:`17053`)
Timedelta
- Bug in :class:`.TimedeltaIndex`, :class:`Series`, and :class:`DataFrame` floor-division with ``timedelta64`` dtypes and ``NaT`` in the denominator (:issue:`35529`)
- Bug in parsing of ISO 8601 durations in :class:`Timedelta` and :func:`to_datetime` (:issue:`29773`, :issue:`36204`)
- Bug in :func:`to_timedelta` with a read-only array incorrectly raising (:issue:`34857`)
- Bug in :class:`Timedelta` incorrectly truncating to sub-second portion of a string input when it has precision higher than nanoseconds (:issue:`36738`)
Timezones
- Bug in :func:`date_range` was raising ``AmbiguousTimeError`` for valid input with ``ambiguous=False`` (:issue:`35297`)
- Bug in :meth:`Timestamp.replace` was losing fold information (:issue:`37610`)
Numeric
- Bug in :func:`to_numeric` where float precision was incorrect (:issue:`31364`)
- Bug in :meth:`DataFrame.any` with ``axis=1`` and ``bool_only=True`` ignoring the ``bool_only`` keyword (:issue:`32432`)
- Bug in :meth:`Series.equals` where a ``ValueError`` was raised when NumPy arrays were compared to scalars (:issue:`35267`)
- Bug in :class:`Series` where two Series each have a :class:`.DatetimeIndex` with different time zones having those indexes incorrectly changed when performing arithmetic operations (:issue:`33671`)
- Bug in :mod:`pandas.testing` module functions when used with ``check_exact=False`` on complex numeric types (:issue:`28235`)
- Bug in :meth:`DataFrame.__rmatmul__` error handling reporting transposed shapes (:issue:`21581`)
- Bug in :class:`Series` flex arithmetic methods where the result when operating with a ``list``, ``tuple`` or ``np.ndarray`` would have an incorrect name (:issue:`36760`)
- Bug in :class:`.IntegerArray` multiplication with ``timedelta`` and ``np.timedelta64`` objects (:issue:`36870`)
- Bug in :class:`MultiIndex` comparison with tuple incorrectly treating tuple as array-like (:issue:`21517`)
- Bug in :meth:`DataFrame.diff` with ``datetime64`` dtypes including ``NaT`` values failing to fill ``NaT`` results correctly (:issue:`32441`)
- Bug in :class:`DataFrame` arithmetic ops incorrectly accepting keyword arguments (:issue:`36843`)
- Bug in :class:`.IntervalArray` comparisons with :class:`Series` not returning Series (:issue:`36908`)
- Bug in :class:`DataFrame` allowing arithmetic operations with list of array-likes with undefined results. Behavior changed to raising ``ValueError`` (:issue:`36702`)
- Bug in :meth:`DataFrame.std` with ``timedelta64`` dtype and ``skipna=False`` (:issue:`37392`)
- Bug in :meth:`DataFrame.min` and :meth:`DataFrame.max` with ``datetime64`` dtype and ``skipna=False`` (:issue:`36907`)
- Bug in :meth:`DataFrame.idxmax` and :meth:`DataFrame.idxmin` with mixed dtypes incorrectly raising ``TypeError`` (:issue:`38195`)
Conversion
- Bug in :meth:`DataFrame.to_dict` with ``orient='records'`` now returns python native datetime objects for datetime-like columns (:issue:`21256`)
- Bug in :meth:`Series.astype` conversion from ``string`` to ``float`` raised in presence of ``pd.NA`` values (:issue:`37626`)
Strings
- Bug in :meth:`Series.to_string`, :meth:`DataFrame.to_string`, and :meth:`DataFrame.to_latex` adding a leading space when ``index=False`` (:issue:`24980`)
- Bug in :func:`to_numeric` raising a ``TypeError`` when attempting to convert a string dtype Series containing only numeric strings and ``NA`` (:issue:`37262`)
Interval
- Bug in :meth:`DataFrame.replace` and :meth:`Series.replace` where :class:`Interval` dtypes would be converted to object dtypes (:issue:`34871`)
- Bug in :meth:`IntervalIndex.take` with negative indices and ``fill_value=None`` (:issue:`37330`)
- Bug in :meth:`IntervalIndex.putmask` with datetime-like dtype incorrectly casting to object dtype (:issue:`37968`)
- Bug in :meth:`IntervalArray.astype` incorrectly dropping dtype information with a :class:`CategoricalDtype` object (:issue:`37984`)
Indexing
- Bug in :meth:`PeriodIndex.get_loc` incorrectly raising ``ValueError`` on non-datelike strings instead of ``KeyError``, causing similar errors in :meth:`Series.__getitem__`, :meth:`Series.__contains__`, and :meth:`Series.loc.__getitem__` (:issue:`34240`)
- Bug in :meth:`Index.sort_values` where, when empty values were passed, the method would break by trying to compare missing values instead of pushing them to the end of the sort order (:issue:`35584`)
- Bug in :meth:`Index.get_indexer` and :meth:`Index.get_indexer_non_unique` where ``int64`` arrays are returned instead of ``intp`` (:issue:`36359`)
- Bug in :meth:`DataFrame.sort_index` where parameter ascending passed as a list on a single level index gives wrong result (:issue:`32334`)
- Bug in :meth:`DataFrame.reset_index` was incorrectly raising a ``ValueError`` for input with a :class:`MultiIndex` with missing values in a level with ``Categorical`` dtype (:issue:`24206`)
- Bug in indexing with boolean masks on datetime-like values sometimes returning a view instead of a copy (:issue:`36210`)
- Bug in :meth:`DataFrame.__getitem__` and :meth:`DataFrame.loc.__getitem__` with :class:`IntervalIndex` columns and a numeric indexer (:issue:`26490`)
- Bug in :meth:`Series.loc.__getitem__` with a non-unique :class:`MultiIndex` and an empty-list indexer (:issue:`13691`)
- Bug in indexing on a :class:`Series` or :class:`DataFrame` with a :class:`MultiIndex` and a level named ``"0"`` (:issue:`37194`)
- Bug in :meth:`Series.__getitem__` when using an unsigned integer array as an indexer giving incorrect results or segfaulting instead of raising ``KeyError`` (:issue:`37218`)
- Bug in :meth:`Index.where` incorrectly casting numeric values to strings (:issue:`37591`)
- Bug in :meth:`DataFrame.loc` returning empty result when indexer is a slice with negative step size (:issue:`38071`)
- Bug in :meth:`Series.loc` and :meth:`DataFrame.loc` raises when the index was of ``object`` dtype and the given numeric label was in the index (:issue:`26491`)
- Bug in :meth:`DataFrame.loc` returned requested key plus missing values when ``loc`` was applied to single level from a :class:`MultiIndex` (:issue:`27104`)
- Bug in indexing on a :class:`Series` or :class:`DataFrame` with a :class:`CategoricalIndex` using a list-like indexer containing NA values (:issue:`37722`)
- Bug in :meth:`DataFrame.loc.__setitem__` expanding an empty :class:`DataFrame` with mixed dtypes (:issue:`37932`)
- Bug in :meth:`DataFrame.xs` ignored ``droplevel=False`` for columns (:issue:`19056`)
- Bug in :meth:`DataFrame.reindex` raising ``IndexingError`` wrongly for empty DataFrame with ``tolerance`` not ``None`` or ``method="nearest"`` (:issue:`27315`)
- Bug in indexing on a :class:`Series` or :class:`DataFrame` with a :class:`CategoricalIndex` using list-like indexer that contains elements that are in the index's ``categories`` but not in the index itself failing to raise ``KeyError`` (:issue:`37901`)
- Bug on inserting a boolean label into a :class:`DataFrame` with a numeric :class:`Index` columns incorrectly casting to integer (:issue:`36319`)
- Bug in :meth:`DataFrame.iloc` and :meth:`Series.iloc` aligning objects in ``__setitem__`` (:issue:`22046`)
- Bug in :meth:`MultiIndex.drop` does not raise if labels are partially found (:issue:`37820`)
- Bug in :meth:`DataFrame.loc` did not raise ``KeyError`` when missing combination was given with ``slice(None)`` for remaining levels (:issue:`19556`)
- Bug in :meth:`DataFrame.loc` raising ``TypeError`` when non-integer slice was given to select values from :class:`MultiIndex` (:issue:`25165`, :issue:`24263`)
- Bug in :meth:`Series.at` returning :class:`Series` with one element instead of scalar when index is a :class:`MultiIndex` with one level (:issue:`38053`)
- Bug in :meth:`DataFrame.loc` returning and assigning elements in wrong order when indexer is differently ordered than the :class:`MultiIndex` to filter (:issue:`31330`, :issue:`34603`)
- Bug in :meth:`DataFrame.loc` and :meth:`DataFrame.__getitem__` raising ``KeyError`` when columns were :class:`MultiIndex` with only one level (:issue:`29749`)
- Bug in :meth:`Series.__getitem__` and :meth:`DataFrame.__getitem__` raising blank ``KeyError`` without missing keys for :class:`IntervalIndex` (:issue:`27365`)
- Bug in setting a new label on a :class:`DataFrame` or :class:`Series` with a :class:`CategoricalIndex` incorrectly raising ``TypeError`` when the new label is not among the index's categories (:issue:`38098`)
- Bug in :meth:`Series.loc` and :meth:`Series.iloc` raising ``ValueError`` when inserting a list-like ``np.array``, ``list`` or ``tuple`` in an ``object`` Series of equal length (:issue:`37748`, :issue:`37486`)
- Bug in :meth:`Series.loc` and :meth:`Series.iloc` setting all the values of an ``object`` Series with those of a list-like ``ExtensionArray`` instead of inserting it (:issue:`38271`)
Missing
- Bug in :meth:`.SeriesGroupBy.transform` now correctly handles missing values for ``dropna=False`` (:issue:`35014`)
- Bug in :meth:`Series.nunique` with ``dropna=True`` was returning incorrect results when both ``NA`` and ``None`` missing values were present (:issue:`37566`)
- Bug in :meth:`Series.interpolate` where kwarg ``limit_area`` and ``limit_direction`` had no effect when using methods ``pad`` and ``backfill`` (:issue:`31048`)
MultiIndex
- Bug in :meth:`DataFrame.xs` when used with :class:`IndexSlice` raises ``TypeError`` with message ``"Expected label or tuple of labels"`` (:issue:`35301`)
- Bug in :meth:`DataFrame.reset_index` with ``NaT`` values in index raises ``ValueError`` with message ``"cannot convert float NaN to integer"`` (:issue:`36541`)
- Bug in :meth:`DataFrame.combine_first` when used with :class:`MultiIndex` containing string and ``NaN`` values raises ``TypeError`` (:issue:`36562`)
- Bug in :meth:`MultiIndex.drop` dropped ``NaN`` values when non existing key was given as input (:issue:`18853`)
- Bug in :meth:`MultiIndex.drop` dropping more values than expected when index has duplicates and is not sorted (:issue:`33494`)
I/O
- :func:`read_sas` no longer leaks resources on failure (:issue:`35566`)
- Bug in :meth:`DataFrame.to_csv` and :meth:`Series.to_csv` caused a ``ValueError`` when it was called with a filename in combination with ``mode`` containing a ``b`` (:issue:`35058`)
- Bug in :meth:`read_csv` with ``float_precision='round_trip'`` did not handle ``decimal`` and ``thousands`` parameters (:issue:`35365`)
- :meth:`to_pickle` and :meth:`read_pickle` were closing user-provided file objects (:issue:`35679`)
- :meth:`to_csv` passes compression arguments for ``'gzip'`` always to ``gzip.GzipFile`` (:issue:`28103`)
- :meth:`to_csv` did not support zip compression for binary file object not having a filename (:issue:`35058`)
- :meth:`to_csv` and :meth:`read_csv` did not honor ``compression`` and ``encoding`` for path-like objects that are internally converted to file-like objects (:issue:`35677`, :issue:`26124`, :issue:`32392`)
- :meth:`DataFrame.to_pickle`, :meth:`Series.to_pickle`, and :meth:`read_pickle` did not support compression for file-objects (:issue:`26237`, :issue:`29054`, :issue:`29570`)
- Bug in :func:`LongTableBuilder.middle_separator` was duplicating LaTeX longtable entries in the List of Tables of a LaTeX document (:issue:`34360`)
- Bug in :meth:`read_csv` with ``engine='python'`` truncating data if multiple items present in first row and first element started with BOM (:issue:`36343`)
- Removed ``private_key`` and ``verbose`` from :func:`read_gbq` as they are no longer supported in ``pandas-gbq`` (:issue:`34654`, :issue:`30200`)
- Bumped minimum pytables version to 3.5.1 to avoid a ``ValueError`` in :meth:`read_hdf` (:issue:`24839`)
- Bug in :func:`read_table` and :func:`read_csv` when ``delim_whitespace=True`` and ``sep=default`` (:issue:`36583`)
- Bug in :meth:`DataFrame.to_json` and :meth:`Series.to_json` when used with ``lines=True`` and ``orient='records'`` the last line of the record is not appended with 'new line character' (:issue:`36888`)
- Bug in :meth:`read_parquet` with fixed offset time zones. String representation of time zones was not recognized (:issue:`35997`, :issue:`36004`)
- Bug in :meth:`DataFrame.to_html`, :meth:`DataFrame.to_string`, and :meth:`DataFrame.to_latex` ignoring the ``na_rep`` argument when ``float_format`` was also specified (:issue:`9046`, :issue:`13828`)
- Bug in output rendering of complex numbers showing too many trailing zeros (:issue:`36799`)
- Bug in :class:`HDFStore` threw a ``TypeError`` when exporting an empty DataFrame with ``datetime64[ns, tz]`` dtypes with a fixed HDF5 store (:issue:`20594`)
- Bug in :class:`HDFStore` was dropping time zone information when exporting a Series with ``datetime64[ns, tz]`` dtypes with a fixed HDF5 store (:issue:`20594`)
- :func:`read_csv` was closing user-provided binary file handles when ``engine="c"`` and an ``encoding`` was requested (:issue:`36980`)
- Bug in :meth:`DataFrame.to_hdf` was not dropping missing rows with ``dropna=True`` (:issue:`35719`)
- Bug in :func:`read_html` was raising a ``TypeError`` when supplying a ``pathlib.Path`` argument to the ``io`` parameter (:issue:`37705`)
- :meth:`DataFrame.to_excel`, :meth:`Series.to_excel`, :meth:`DataFrame.to_markdown`, and :meth:`Series.to_markdown` now support writing to fsspec URLs such as S3 and Google Cloud Storage (:issue:`33987`)
- Bug in :func:`read_fwf` with ``skip_blank_lines=True`` was not skipping blank lines (:issue:`37758`)
- Parse missing values using :func:`read_json` with ``dtype=False`` to ``NaN`` instead of ``None`` (:issue:`28501`)
- :meth:`read_fwf` was inferring compression with ``compression=None`` which was not consistent with the other ``read_*`` functions (:issue:`37909`)
- :meth:`DataFrame.to_html` was ignoring ``formatters`` argument for ``ExtensionDtype`` columns (:issue:`36525`)
- Bumped minimum xarray version to 0.12.3 to avoid reference to the removed ``Panel`` class (:issue:`27101`, :issue:`37983`)
- :meth:`DataFrame.to_csv` was re-opening file-like handles that also implement ``os.PathLike`` (:issue:`38125`)
- Bug in the conversion of a sliced ``pyarrow.Table`` with missing values to a DataFrame (:issue:`38525`)
- Bug in :func:`read_sql_table` raising a ``sqlalchemy.exc.OperationalError`` when column names contained a percentage sign (:issue:`37517`)
Period
- Bug in :meth:`DataFrame.replace` and :meth:`Series.replace` where :class:`Period` dtypes would be converted to object dtypes (:issue:`34871`)
Plotting
- Bug in :meth:`DataFrame.plot` was rotating xticklabels when ``subplots=True``, even if the x-axis wasn't an irregular time series (:issue:`29460`)
- Bug in :meth:`DataFrame.plot` where a marker letter in the ``style`` keyword sometimes caused a ``ValueError`` (:issue:`21003`)
- Bug in :meth:`DataFrame.plot.bar` and :meth:`Series.plot.bar` where ticks positions were assigned by value order instead of using the actual value for numeric or a smart ordering for string (:issue:`26186`, :issue:`11465`). This fix has been reverted in pandas 1.2.1, see :doc:`v1.2.1`
- Twinned axes were losing their tick labels which should only happen to all but the last row or column of 'externally' shared axes (:issue:`33819`)
- Bug in :meth:`Series.plot` and :meth:`DataFrame.plot` was throwing a :exc:`ValueError` when the Series or DataFrame was
indexed by a :class:`.TimedeltaIndex` with a fixed frequency and the x-axis lower limit was greater than the upper limit (:issue:`37454`)
- Bug in :meth:`.DataFrameGroupBy.boxplot` when ``subplots=False`` would raise a ``KeyError`` (:issue:`16748`)
- Bug in :meth:`DataFrame.plot` and :meth:`Series.plot` was overwriting matplotlib's shared y axes behavior when no ``sharey`` parameter was passed (:issue:`37942`)
- Bug in :meth:`DataFrame.plot` was raising a ``TypeError`` with ``ExtensionDtype`` columns (:issue:`32073`)
Styler
- Bug in :meth:`Styler.render` HTML was generated incorrectly because of formatting error in ``rowspan`` attribute, it now matches with w3 syntax (:issue:`38234`)
Groupby/resample/rolling
- Bug in :meth:`.DataFrameGroupBy.count` and :meth:`SeriesGroupBy.sum` returning ``NaN`` for missing categories when grouped on multiple ``Categoricals``. Now returning ``0`` (:issue:`35028`)
- Bug in :meth:`.DataFrameGroupBy.apply` that would sometimes throw an erroneous ``ValueError`` if the grouping axis had duplicate entries (:issue:`16646`)
- Bug in :meth:`DataFrame.resample` that would throw a ``ValueError`` when resampling from ``"D"`` to ``"24H"`` over a transition into daylight savings time (DST) (:issue:`35219`)
- Bug when combining methods :meth:`DataFrame.groupby` with :meth:`DataFrame.resample` and :meth:`DataFrame.interpolate` raising a ``TypeError`` (:issue:`35325`)
- Bug in :meth:`.DataFrameGroupBy.apply` where a non-nuisance grouping column would be dropped from the output columns if another groupby method was called before ``.apply`` (:issue:`34656`)
- Bug when subsetting columns on a :class:`~pandas.core.groupby.DataFrameGroupBy` (e.g. ``df.groupby('a')[['b']])``) would reset the attributes ``axis``, ``dropna``, ``group_keys``, ``level``, ``mutated``, ``sort``, and ``squeeze`` to their default values (:issue:`9959`)
- Bug in :meth:`.DataFrameGroupBy.tshift` failing to raise ``ValueError`` when a frequency cannot be inferred for the index of a group (:issue:`35937`)
- Bug in :meth:`DataFrame.groupby` does not always maintain column index name for ``any``, ``all``, ``bfill``, ``ffill``, ``shift`` (:issue:`29764`)
- Bug in :meth:`.DataFrameGroupBy.apply` raising error with ``np.nan`` group(s) when ``dropna=False`` (:issue:`35889`)
- Bug in :meth:`.Rolling.sum` returned wrong values when dtypes where mixed between float and integer and ``axis=1`` (:issue:`20649`, :issue:`35596`)
- Bug in :meth:`.Rolling.count` returned ``np.nan`` with :class:`~pandas.api.indexers.FixedForwardWindowIndexer` as window, ``min_periods=0`` and only missing values in the window (:issue:`35579`)
- Bug where :class:`pandas.core.window.Rolling` produces incorrect window sizes when using a ``PeriodIndex`` (:issue:`34225`)
- Bug in :meth:`.DataFrameGroupBy.ffill` and :meth:`.DataFrameGroupBy.bfill` where a ``NaN`` group would return filled values instead of ``NaN`` when ``dropna=True`` (:issue:`34725`)
- Bug in :meth:`.RollingGroupby.count` where a ``ValueError`` was raised when specifying the ``closed`` parameter (:issue:`35869`)
- Bug in :meth:`.DataFrameGroupBy.rolling` returning wrong values with partial centered window (:issue:`36040`)
- Bug in :meth:`.DataFrameGroupBy.rolling` returned wrong values with time aware window containing ``NaN``. Raises ``ValueError`` because windows are not monotonic now (:issue:`34617`)
- Bug in :meth:`.Rolling.__iter__` where a ``ValueError`` was not raised when ``min_periods`` was larger than ``window`` (:issue:`37156`)
- Using :meth:`.Rolling.var` instead of :meth:`.Rolling.std` avoids numerical issues for :meth:`.Rolling.corr` when :meth:`.Rolling.var` is still within floating point precision while :meth:`.Rolling.std` is not (:issue:`31286`)
- Bug in :meth:`.DataFrameGroupBy.quantile` and :meth:`.Resampler.quantile` raised ``TypeError`` when values were of type ``Timedelta`` (:issue:`29485`)
- Bug in :meth:`.Rolling.median` and :meth:`.Rolling.quantile` returned wrong values for :class:`.BaseIndexer` subclasses with non-monotonic starting or ending points for windows (:issue:`37153`)
- Bug in :meth:`DataFrame.groupby` dropped ``nan`` groups from result with ``dropna=False`` when grouping over a single column (:issue:`35646`, :issue:`35542`)
- Bug in :meth:`.DataFrameGroupBy.head`, :meth:`DataFrameGroupBy.tail`, :meth:`SeriesGroupBy.head`, and :meth:`SeriesGroupBy.tail` would raise when used with ``axis=1`` (:issue:`9772`)
- Bug in :meth:`.DataFrameGroupBy.transform` would raise when used with ``axis=1`` and a transformation kernel (e.g. "shift") (:issue:`36308`)
- Bug in :meth:`.DataFrameGroupBy.resample` using ``.agg`` with sum produced different result than just calling ``.sum`` (:issue:`33548`)
- Bug in :meth:`.DataFrameGroupBy.apply` dropped values on ``nan`` group when returning the same axes with the original frame (:issue:`38227`)
- Bug in :meth:`.DataFrameGroupBy.quantile` couldn't handle with arraylike ``q`` when grouping by columns (:issue:`33795`)
- Bug in :meth:`DataFrameGroupBy.rank` with ``datetime64tz`` or period dtype incorrectly casting results to those dtypes instead of returning ``float64`` dtype (:issue:`38187`)
Reshaping
- Bug in :meth:`DataFrame.crosstab` was returning incorrect results on inputs with duplicate row names, duplicate column names or duplicate names between row and column labels (:issue:`22529`)
- Bug in :meth:`DataFrame.pivot_table` with ``aggfunc='count'`` or ``aggfunc='sum'`` returning ``NaN`` for missing categories when pivoted on a ``Categorical``. Now returning ``0`` (:issue:`31422`)
- Bug in :func:`concat` and :class:`DataFrame` constructor where input index names are not preserved in some cases (:issue:`13475`)
- Bug in func :meth:`crosstab` when using multiple columns with ``margins=True`` and ``normalize=True`` (:issue:`35144`)
- Bug in :meth:`DataFrame.stack` where an empty DataFrame.stack would raise an error (:issue:`36113`). Now returning an empty Series with empty MultiIndex.
- Bug in :meth:`Series.unstack`. Now a Series with single level of Index trying to unstack would raise a ``ValueError`` (:issue:`36113`)
- Bug in :meth:`DataFrame.agg` with ``func={'name':<FUNC>}`` incorrectly raising ``TypeError`` when ``DataFrame.columns==['Name']`` (:issue:`36212`)
- Bug in :meth:`Series.transform` would give incorrect results or raise when the argument ``func`` was a dictionary (:issue:`35811`)
- Bug in :meth:`DataFrame.pivot` did not preserve :class:`MultiIndex` level names for columns when rows and columns are both multiindexed (:issue:`36360`)
- Bug in :meth:`DataFrame.pivot` modified ``index`` argument when ``columns`` was passed but ``values`` was not (:issue:`37635`)
- Bug in :meth:`DataFrame.join` returned a non deterministic level-order for the resulting :class:`MultiIndex` (:issue:`36910`)
- Bug in :meth:`DataFrame.combine_first` caused wrong alignment with dtype ``string`` and one level of ``MultiIndex`` containing only ``NA`` (:issue:`37591`)
- Fixed regression in :func:`merge` on merging :class:`.DatetimeIndex` with empty DataFrame (:issue:`36895`)
- Bug in :meth:`DataFrame.apply` not setting index of return value when ``func`` return type is ``dict`` (:issue:`37544`)
- Bug in :meth:`DataFrame.merge` and :meth:`pandas.merge` returning inconsistent ordering in result for ``how=right`` and ``how=left`` (:issue:`35382`)
- Bug in :func:`merge_ordered` couldn't handle list-like ``left_by`` or ``right_by`` (:issue:`35269`)
- Bug in :func:`merge_ordered` returned wrong join result when length of ``left_by`` or ``right_by`` equals to the rows of ``left`` or ``right`` (:issue:`38166`)
- Bug in :func:`merge_ordered` didn't raise when elements in ``left_by`` or ``right_by`` not exist in ``left`` columns or ``right`` columns (:issue:`38167`)
- Bug in :func:`DataFrame.drop_duplicates` not validating bool dtype for ``ignore_index`` keyword (:issue:`38274`)
ExtensionArray
- Fixed bug where :class:`DataFrame` column set to scalar extension type via a dict instantiation was considered an object type rather than the extension type (:issue:`35965`)
- Fixed bug where ``astype()`` with equal dtype and ``copy=False`` would return a new object (:issue:`28488`)
- Fixed bug when applying a NumPy ufunc with multiple outputs to an :class:`.IntegerArray` returning ``None`` (:issue:`36913`)
- Fixed an inconsistency in :class:`.PeriodArray`'s ``__init__`` signature to those of :class:`.DatetimeArray` and :class:`.TimedeltaArray` (:issue:`37289`)
- Reductions for :class:`.BooleanArray`, :class:`.Categorical`, :class:`.DatetimeArray`, :class:`.FloatingArray`, :class:`.IntegerArray`, :class:`.PeriodArray`, :class:`.TimedeltaArray`, and :class:`.PandasArray` are now keyword-only methods (:issue:`37541`)
- Fixed a bug where a ``TypeError`` was wrongly raised if a membership check was made on an ``ExtensionArray`` containing nan-like values (:issue:`37867`)
Other
- Bug in :meth:`DataFrame.replace` and :meth:`Series.replace` incorrectly raising an ``AssertionError`` instead of a ``ValueError`` when invalid parameter combinations are passed (:issue:`36045`)
- Bug in :meth:`DataFrame.replace` and :meth:`Series.replace` with numeric values and string ``to_replace`` (:issue:`34789`)
- Fixed metadata propagation in :meth:`Series.abs` and ufuncs called on Series and DataFrames (:issue:`28283`)
- Bug in :meth:`DataFrame.replace` and :meth:`Series.replace` incorrectly casting from ``PeriodDtype`` to object dtype (:issue:`34871`)
- Fixed bug in metadata propagation incorrectly copying DataFrame columns as metadata when the column name overlaps with the metadata name (:issue:`37037`)
- Fixed metadata propagation in the :class:`Series.dt`, :class:`Series.str` accessors, :class:`DataFrame.duplicated`, :class:`DataFrame.stack`, :class:`DataFrame.unstack`, :class:`DataFrame.pivot`, :class:`DataFrame.append`, :class:`DataFrame.diff`, :class:`DataFrame.applymap` and :class:`DataFrame.update` methods (:issue:`28283`, :issue:`37381`)
- Fixed metadata propagation when selecting columns with ``DataFrame.__getitem__`` (:issue:`28283`)
- Bug in :meth:`Index.intersection` with non-:class:`Index` failing to set the correct name on the returned :class:`Index` (:issue:`38111`)
- Bug in :meth:`RangeIndex.intersection` failing to set the correct name on the returned :class:`Index` in some corner cases (:issue:`38197`)
- Bug in :meth:`Index.difference` failing to set the correct name on the returned :class:`Index` in some corner cases (:issue:`38268`)
- Bug in :meth:`Index.union` behaving differently depending on whether operand is an :class:`Index` or other list-like (:issue:`36384`)
- Bug in :meth:`Index.intersection` with non-matching numeric dtypes casting to ``object`` dtype instead of minimal common dtype (:issue:`38122`)
- Bug in :meth:`IntervalIndex.union` returning an incorrectly-typed :class:`Index` when empty (:issue:`38282`)
- Passing an array with 2 or more dimensions to the :class:`Series` constructor now raises the more specific ``ValueError`` rather than a bare ``Exception`` (:issue:`35744`)
- Bug in ``dir`` where ``dir(obj)`` wouldn't show attributes defined on the instance for pandas objects (:issue:`37173`)
- Bug in :meth:`Index.drop` raising ``InvalidIndexError`` when index has duplicates (:issue:`38051`)
- Bug in :meth:`RangeIndex.difference` returning :class:`Int64Index` in some cases where it should return :class:`RangeIndex` (:issue:`38028`)
- Fixed bug in :func:`assert_series_equal` when comparing a datetime-like array with an equivalent non extension dtype array (:issue:`37609`)
- Bug in :func:`.is_bool_dtype` would raise when passed a valid string such as ``"boolean"`` (:issue:`38386`)
- Fixed regression in logical operators raising ``ValueError`` when columns of :class:`DataFrame` are a :class:`CategoricalIndex` with unused categories (:issue:`38367`)
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Changes from 2.7.2 to 2.7.3
---------------------------
- Pinned Numpy versions to minimum supported version in an effort to alleviate
issues seen in Windows machines not having the same MSVC runtime installed as
was used to build the wheels.
- ARMv8 wheels are now available, thanks to `odidev` for the pull request.
Changes from 2.7.1 to 2.7.2
---------------------------
- Support for Python 2.7 and 3.5 is deprecated and will be discontinued when
`cibuildwheels` and/or GitHub Actions no longer support these versions.
- Wheels are now provided for Python 3.7, 3.5, 3.6, 3.7, 3.8, and 3.9 via
GitHub Actions.
- The block size is now exported into the namespace as `numexpr.__BLOCK_SIZE1__`
as a read-only value.
- If using MKL, the number of threads for VML is no longer forced to 1 on loading
the module. Testing has shown that VML never runs in multi-threaded mode for
the default BLOCKSIZE1 of 1024 elements, and forcing to 1 can have deleterious
effects on NumPy functions when built with MKL.
- Use of `ndarray.tostring()` in tests has been switch to `ndarray.tobytes()`
for future-proofing deprecation of `.tostring()`, if the version of NumPy is
greater than 1.9.
- Added a utility method `get_num_threads` that returns the (maximum) number of
threads currently in use by the virtual machine. The functionality of
`set_num_threads` whereby it returns the previous value has been deprecated
and will be removed in 2.8.X.
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Wrappers 1.3.1 | Solver 1.3.1 | 11/01/2020
allow to avoid linking against VC2014_1 on windows
do not mark move constructor / assignment operator of expression as noexcept. This is to circumvent a suspected bug in the GCC compiler in the manylinux1 image.
Wrappers 1.3.0 | Solver 1.3.0 | 10/21/2020
add c++ benchmarks and run them on CIs
modernize the c++ code by using more c++11 features
introduce move semantic in some c++ constructors to improve performances
add support for Python 3.9
Wrappers 1.2.0 | Solver 1.2.0 | 03/26/2020
make the the c++ part of the code c++11 compliant
use cppy for Python/C bindings
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Better have this listed as breakage for py36-numpy than not having the
bulk builds start up because the packages using this still want to
build it for python 3.6
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