/py-cython, C-Extensions for Python
0.23.2, Package name:
py27-cython-0.23.2, Maintainer: jihbed.research
The Cython language makes writing C extensions for the Python language
as easy as Python itself. Cython is a source code translator based on
the well-known Pyrex, but supports more cutting edge functionality and
The Cython language is very close to the Python language (and most
Python code is also valid Cython code), but Cython additionally supports
calling C functions and declaring C types on variables and class
attributes. This allows the compiler to generate very efficient C code
from Cython code.
This makes Cython the ideal language for writing glue code for external
C libraries, and for fast C modules that speed up the execution of
Required to run:
Master sites: SHA1:
Version history: (Expand)
- (2015-10-01) Updated to version: py27-cython-0.23.2
- (2015-08-25) Updated to version: py27-cython-0.23.1
- (2015-08-15) Updated to version: py27-cython-0.23
- (2015-07-01) Updated to version: py27-cython-0.22.1
- (2015-02-17) Updated to version: py27-cython-0.22
- (2014-12-30) Updated to version: py27-cython-0.21.2
CVS history: (Expand)
| 2015-09-30 21:22:08 by Thomas Klausner | Files touched by this commit (2) | |
Update to 0.23.2:
* Compiler crash when analysing some optimised expressions.
* Coverage plugin was adapted to coverage.py 4.0 beta 2.
* C++ destructor calls could fail when '&' operator is overwritten.
* Incorrect C literal generation for large integers in compile-time
evaluated DEF expressions and constant folded expressions.
* Byte string constants could end up as Unicode strings when originating
from compile-time evaluated DEF expressions.
* Invalid C code when caching known builtin methods.
This fixes ticket 860.
* ``ino_t`` in ``posix.types`` was not declared as ``unsigned``.
* Declarations in ``libcpp/memory.pxd`` were missing ``operator!()``.
Patch by Leo Razoumov.
* Static cdef methods can now be declared in .pxd files.
| 2015-08-25 10:59:15 by Thomas Klausner | Files touched by this commit (2) | |
Update to 0.23.1:
* Invalid C code for generators. This fixes ticket 858.
* Invalid C code for some builtin methods. This fixes ticket 856.
* Invalid C code for unused local buffer variables.
This fixes ticket 154.
* Test failures on 32bit systems. This fixes ticket 857.
* Code that uses "from xyz import *" and global C struct/union/array
variables could fail to compile due to missing helper functions.
This fixes ticket 851.
* Misnamed PEP 492 coroutine property ``cr_yieldfrom`` renamed to
``cr_await`` to match CPython.
* Missing deallocation code for C++ object attributes in certain
extension class hierarchies.
* Crash when async coroutine was not awaited.
* Compiler crash on ``yield`` in signature annotations and default
argument values. Both are forbidden now.
* Compiler crash on certain constructs in ``finally`` clauses.
* Cython failed to build when CPython's pgen is installed.
| 2015-08-14 19:47:54 by Thomas Klausner | Files touched by this commit (3) | |
Update to 0.23:
* PEP 492 (async/await) was implemented.
* PEP 448 (Additional Unpacking Generalizations) was implemented.
* Support for coverage.py 4.0+ can be enabled by adding the plugin
"Cython.Coverage" to the ".coveragerc" config file.
* Annotated HTML source pages can integrate (XML) coverage reports.
* Tracing is supported in ``nogil`` functions/sections and module init code.
* When generators are used in a Cython module and the module imports the
modules "inspect" and/or "asyncio", Cython enables \
patching these modules during the import to recognise Cython's internal
generator and coroutine types. This can be disabled by C compiling the
module with "-D CYTHON_PATCH_ASYNCIO=0" or "-D \
* When generators or coroutines are used in a Cython module, their types
are registered with the ``Generator`` and ``Coroutine`` ABCs in the
``collections`` or ``collections.abc`` stdlib module at import time to
enable interoperability with code that needs to detect and process Python
generators/coroutines. These ABCs were added in CPython 3.5 and are
available for older Python versions through the ``backports_abc`` module
on PyPI. See https://bugs.python.org/issue24018
* Adding/subtracting/dividing/modulus and equality comparisons with
constant Python floats and small integers are faster.
* Binary and/or/xor/rshift operations with small constant Python integers
* When called on generator expressions, the builtins ``all()``, ``any()``,
``dict()``, ``list()``, ``set()``, ``sorted()`` and ``unicode.join()``
avoid the generator iteration overhead by inlining a part of their
functionality into the for-loop.
* Keyword argument dicts are no longer copied on function entry when they
are not being used or only passed through to other function calls (e.g.
in wrapper functions).
* The ``PyTypeObject`` declaration in ``cpython.object`` was extended.
* The builtin ``type`` type is now declared as PyTypeObject in source,
allowing for extern functions taking type parameters to have the correct
C signatures. Note that this might break code that uses ``type`` just
for passing around Python types in typed variables. Removing the type
declaration provides a backwards compatible fix.
* ``wraparound()`` and ``boundscheck()`` are available as no-ops in pure
* Const iterators were added to the provided C++ STL declarations.
* Smart pointers were added to the provided C++ STL declarations.
Patch by Daniel Filonik.
* ``NULL`` is allowed as default argument when embedding signatures.
This fixes ticket 843.
* When compiling with ``--embed``, the internal module name is changed to
``__main__`` to allow arbitrary program names, including those that would
be invalid for modules. Note that this prevents reuse of the generated
C code as an importable module.
* External C++ classes that overload the assignment operator can be used.
Patch by Ian Henriksen.
* Support operator bool() for C++ classes so they can be used in if statements.
* Calling "yield from" from Python on a Cython generator that returned a
value triggered a crash in CPython. This is now being worked around.
* Language level 3 did not enable true division (a.k.a. float division)
for integer operands.
* Functions with fused argument types that included a generic 'object'
fallback could end up using that fallback also for other explicitly
listed object types.
* Relative cimports could accidentally fall back to trying an absolute
cimport on failure.
* The result of calling a C struct constructor no longer requires an
intermediate assignment when coercing to a Python dict.
* C++ exception declarations with mapping functions could fail to compile
when pre-declared in .pxd files.
* ``cpdef void`` methods are now permitted.
* ``abs(cint)`` could fail to compile in MSVC and used sub-optimal code
in C++. Patch by David Vierra, original patch by Michael Enßlin.
* Buffer index calculations using index variables with small C integer
types could overflow for large buffer sizes.
Original patch by David Vierra.
* C unions use a saner way to coerce from and to Python dicts.
* When compiling a module ``foo.pyx``, the directories in ``sys.path``
are no longer searched when looking for ``foo.pxd``.
Patch by Jeroen Demeyer.
* Memory leaks in the embedding main function were fixed.
Original patch by Michael Enßlin.
* Some complex Python expressions could fail to compile inside of finally
* Unprefixed 'str' literals were not supported as C varargs arguments.
* Fixed type errors in conversion enum types to/from Python. Note that
this imposes stricter correctness requirements on enum declarations.
* Changed mangling scheme in header files generated by ``cdef api``
* Installation under CPython 3.3+ no longer requires a pass of the
2to3 tool. This also makes it possible to run Cython in Python
3.3+ from a source checkout without installing it first.
Patch by Petr Viktorin.
* ``jedi-typer.py`` (in ``Tools/``) was extended and renamed to
``jedityper.py`` (to make it importable) and now works with and
requires Jedi 0.9. Patch by Tzer-jen Wei.
| 2015-07-01 11:55:42 by Thomas Klausner | Files touched by this commit (2) | |
Update to 0.22:
* Crash when returning values on generator termination.
* In some cases, exceptions raised during internal isinstance() checks were
* Runtime reported file paths of source files (e.g for profiling and tracing)
are now relative to the build root directory instead of the main source file.
* Tracing exception handling code could enter the trace function with an active
* The internal generator function type was not shared across modules.
* Comparisons of (inferred) ctuples failed to compile.
* Closures inside of cdef functions returning ``void`` failed to compile.
* Using ``const`` C++ references in intermediate parts of longer expressions
could fail to compile.
* C++ exception declarations with mapping functions could fail to compile when
pre-declared in .pxd files.
* C++ compilation could fail with an ambiguity error in recent MacOS-X Xcode
* C compilation could fail in pypy3.
* Fixed a memory leak in the compiler when compiling multiple modules.
* When compiling multiple modules, external library dependencies could leak
into later compiler runs. Fix by Jeroen Demeyer. This fixes ticket 845.
| 2015-02-17 15:00:01 by Thomas Klausner | Files touched by this commit (3) | |
Update to 0.22:
* C functions can coerce to Python functions, which allows passing them
around as callable objects.
* C arrays can be assigned by value and auto-coerce from Python iterables
and to Python lists (and tuples).
* Extern C functions can now be declared as cpdef to export them to
the module's Python namespace. Extern C functions in pxd files export
their values to their own module, iff it exists.
* Anonymous C tuple types can be declared as (ctype1, ctype2, ...).
* PEP 479: turn accidental StopIteration exceptions that exit generators
into a RuntimeError, activated with future import "generator_stop".
* Looping over ``reversed(range())`` is optimised in the same way as
``range()``. Patch by Favian Contreras.
* Mismatching 'except' declarations on signatures in .pxd and .pyx files failed
to produce a compile error.
* Failure to find any files for the path pattern(s) passed into ``cythonize()``
is now an error to more easily detect accidental typos.
* The ``logaddexp`` family of functions in ``numpy.math`` now has correct
* In Py2.6/7 and Py3.2, simple Cython memory views could accidentally be
interpreted as non-contiguous by CPython, which could trigger a CPython
bug when copying data from them, thus leading to data corruption.
See CPython issues 12834 and 23349.
* Preliminary support for defining the Cython language with a formal grammar.
To try parsing your files against this grammar, use the --formal_grammar directive.
* ``_`` is no longer considered a cacheable builtin as it could interfere with
* Cythonize-computed metadata now cached in the generated C files.
* Several corrections and extensions in numpy, cpython, and libcpp pxd files.
| 2014-12-30 15:23:48 by Thomas Klausner | Files touched by this commit (2) | |
Update to 0.21.2:
* Crash when assigning a C value to both a Python and C target at the same time.
* Automatic coercion from C++ strings to ``str`` generated incomplete code that
failed to compile.
* Declaring a constructor in a C++ child class erroneously required a default
constructor declaration in the super class.
* ``resize_smart()`` in ``cpython.array`` was broken.
* Functions in ``libcpp.cast`` are now declared as ``nogil``.
* Some missing C-API declarations were added.
* Py3 main code in embedding program code was lacking casts.
* Exception related to distutils "Distribution" class type in \
latest CPython 2.7 and 3.4 releases when setuptools is being imported later.
| 2014-10-23 12:09:49 by Thomas Klausner | Files touched by this commit (3) | |
Update to 0.21.1:
* New ``cythonize`` option ``-a`` to generate the annotated HTML source view.
* Missing C-API declarations in ``cpython.unicode`` were added.
* Passing ``language='c++'`` into cythonize() globally enables C++ mode for
all modules that were not passed as Extension objects (i.e. only source
files and file patterns).
* ``Py_hash_t`` is a known type (used in CPython for hash values).
* ``PySlice_*()`` C-API functions are available from the ``cpython.slice``
* Allow arrays of C++ classes.
* Reference leak for non-simple Python expressions in boolean and/or expressions.
* To fix a name collision and to reflect availability on host platforms,
standard C declarations [ clock(), time(), struct tm and tm* functions ]
were moved from posix/time.pxd to a new libc/time.pxd. Patch by Charles
* Rerunning unmodified modules in IPython's cython support failed.
Patch by Matthias Bussonier.
* Casting C++ ``std::string`` to Python byte strings failed when
auto-decoding was enabled.
* Fatal exceptions in global module init code could lead to crashes
if the already created module was used later on (e.g. through a
stale reference in sys.modules or elsewhere).
* ``cythonize.py`` script was not installed on MS-Windows.
* Compilation no longer fails hard when unknown compilation options are
passed. Instead, it raises a warning and ignores them (as it did silently
before 0.21). This will be changed back to an error in a future release.
| 2014-09-15 08:47:10 by Thomas Klausner | Files touched by this commit (1) |
Why did I commit that, I wonder.