./devel/py-cython, C-Extensions for Python

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Branch: CURRENT, Version: 0.28.5, Package name: py27-cython-0.28.5, Maintainer: pkgsrc-users

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
Python code.

Required to run:
[devel/py-setuptools] [lang/python27]

Required to build:

Master sites:

SHA1: d3e9c49cb1fef58e7ddbfec8ac8c388bae554333
RMD160: 673d6a4ea7f195b98cd004de31ce511fc668f93e
Filesize: 1837.019 KB

Version history: (Expand)

CVS history: (Expand)

   2018-08-07 11:36:42 by Adam Ciarcinski | Files touched by this commit (2) | Package updated
Log message:
py-cython: updated to 0.28.5


Bugs fixed

* The discouraged usage of GCC's attribute optimize("Os") was replaced \ 
by the
  similar attribute cold to reduce the code impact of the module init functions.

* A reference leak in Py2.x was fixed when comparing str to unicode for equality.
   2018-07-09 08:34:28 by Adam Ciarcinski | Files touched by this commit (2) | Package updated
Log message:
py-cython: updated to 0.28.4

Bugs fixed
* Reallowing tp_clear() in a subtype of an @no_gc_clear extension type generated \ 
an invalid C function call to the (non-existent) base type implementation.
* Exception catching based on a non-literal (runtime) tuple could fail to match \ 
the exception.
* Compile fix for CPython 3.7.0a2.
   2018-05-29 13:45:06 by Adam Ciarcinski | Files touched by this commit (2) | Package updated
Log message:
py-cython: updated to 0.28.3

Bugs fixed
* Set iteration was broken in non-CPython since 0.28.
* UnicodeEncodeError in Py2 when %s formatting is optimised for unicode strings.
* Work around a crash bug in g++ 4.4.x by disabling the size reduction setting \ 
of the module init function in this version.
   2018-04-13 08:55:45 by Adam Ciarcinski | Files touched by this commit (2) | Package updated
Log message:
py-cython: updated to 0.28.2

0.28.2 (2018-04-13)
Features added
abs() is faster for Python long objects.
The C++11 methods front() and end() were added to the declaration of libcpp.string.
The C++11 methods reserve() and bucket_count() are declared for libcpp.unordered_map.

Bugs fixed
The copy of a read-only memoryview was considered read-only as well, whereas a \ 
common reason to copy a read-only view is to make it writable. The result of the \ 
copying is now a writable buffer by default.
The switch statement generation failed to apply recursively to the body of \ 
converted if-statements.
NULL was sometimes rejected as exception return value when the returned type is \ 
a fused pointer type.
Fixed compatibility with PyPy 5.11.

Other changes
The NumPy tutorial was rewritten to use memoryviews instead of the older buffer \ 
declaration syntax.
   2018-03-19 09:22:54 by Adam Ciarcinski | Files touched by this commit (2) | Package updated
Log message:
py-cython: updated to 0.28.1

Bugs fixed
PyFrozenSet_New() was accidentally used in PyPy where it is missing from the C-API.
Assignment between some C++ templated types were incorrectly rejected when the \ 
templates mix const with ctypedef.
Undeclared C++ no-args constructors in subclasses could make the compilation \ 
fail if the base class constructor was declared without nogil.
Bytes %-formatting inferred basestring (bytes or unicode) as result type in some \ 
cases where bytes would have been safe to infer.
None was accidentally disallowed as typed return value of dict.pop().
   2018-03-15 10:30:18 by Adam Ciarcinski | Files touched by this commit (3) | Package updated
Log message:
py-cython: updated to 0.28

Cdef classes can now multiply inherit from ordinary Python classes.
Type inference is now supported for Pythran compiled NumPy expressions.
The const modifier can be applied to memoryview declarations to allow read-only \ 
buffers as input.
C code in the docstring of a cdef extern block is copied verbatimly into the \ 
generated file. Patch by Jeroen Demeyer.
When compiling with gcc, the module init function is now tuned for small code \ 
size instead of whatever compile flags were provided externally. Cython now also \ 
disables some code intensive optimisations in that function to further reduce \ 
the code size.
Decorating an async coroutine with @cython.iterable_coroutine changes its type \ 
at compile time to make it iterable. While this is not strictly in line with \ 
PEP-492, it improves the interoperability with old-style coroutines that use \ 
yield from instead of await.
The IPython magic has preliminary support for JupyterLab.
The new TSS C-API in CPython 3.7 is supported and has been backported. Patch by \ 
Naotoshi Seo.
Cython knows the new Py_tss_t type defined in PEP-539 and automatically \ 
initialises variables declared with that type to Py_tss_NEEDS_INIT, a value \ 
which cannot be used outside of static assignments.
The set methods .remove() and .discard() are optimised. Patch by Antoine Pitrou.
dict.pop() is optimised. Original patch by Antoine Pitrou.
Iteration over sets and frozensets is optimised.
Safe integer loops (< range(2^30)) are automatically optimised into C loops.
alist.extend([a,b,c]) is optimised into sequential list.append() calls for short \ 
literal sequences.
Calls to builtin methods that are not specifically optimised into C-API calls \ 
now use a cache that avoids repeated lookups of the underlying C function.
Single argument function calls can avoid the argument tuple creation in some cases.
Some redundant extension type checks are avoided.
Formatting C enum values in f-strings is faster, as well as some other special cases.
String formatting with the ‘%’ operator is optimised into f-strings in \ 
simple cases.
Subscripting (item access) is faster in some cases.
Some bytearray operations have been optimised similar to bytes.
Some PEP-484/526 container type declarations are now considered for loop \ 
Indexing into memoryview slices with view[i][j] is now optimised into view[i, j].
Python compatible cython.* types can now be mixed with type declarations in \ 
Cython syntax.
Name lookups in the module and in classes are faster.
Python attribute lookups on extension types without instance dict are faster.
Some missing signals were added to libc/signal.pxd. Patch by Jeroen Demeyer.
The warning about repeated extern declarations is now visible by default.
The exception handling of the function types used by CPython’s type slot \ 
functions was corrected to match the de-facto standard behaviour, so that code \ 
that uses them directly benefits from automatic and correct exception \ 
propagation. Patch by Jeroen Demeyer.
Defining the macro CYTHON_NO_PYINIT_EXPORT will prevent the module init function \ 
from being exported as symbol, e.g. when linking modules statically in an \ 
embedding setup. Patch by AraHaan.
   2017-11-06 11:12:29 by Adam Ciarcinski | Files touched by this commit (2) | Package updated
Log message:
py-cython: updated to 0.27.3


Bugs fixed

* String forward references to extension types like \ 
  failed to find the named type.

* NumPy slicing generated incorrect results when compiled with Pythran.

* Fix "undefined reference" linker error for generators on Windows in \ 

* Adapt to recent C-API change of ``PyThreadState`` in CPython 3.7.

* Fix signature of ``PyWeakref_GetObject()`` API declaration.
   2017-10-23 22:46:22 by Adam Ciarcinski | Files touched by this commit (2) | Package updated
Log message:
py-cython: updated to 0.27.2


Bugs fixed
* Comprehensions could incorrectly be optimised away when they appeared in boolean
  test contexts.
* The special methods ``__eq__``, ``__lt__`` etc. in extension types did not type
  their first argument as the type of the class but ``object``.
* Crash on first lookup of "cline_in_traceback" option during \ 
exception handling.
* Some nested module level comprehensions failed to compile.
* Compiler crash on some complex type declarations in pure mode.
* ``std::unordered_map.erase()`` was declared with an incorrect ``void`` return
  type in ``libcpp.unordered_map``.
* Invalid use of C++ ``fallthrough`` attribute before C++11 and similar issue in \ 
* Compiler crash on misnamed properties.