Mailman 3 October 2017 - capi-sig

ANN: expy 0.6.5 released!
by Yingjie Lan 16 Apr '22

16 Apr '22

EXPY is an express way to extend Python! EXPY provides a way to extend python in an elegant way. For more information and a tutorial, see: http://expy.sourceforge.net/ What's new: 1. Correct treatment of __init__ method. 2. Give warnings of missing Py_INCREF on appropriate special type methods. 3. Documentation update. Cheers, Yingjie

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ANNOUNCE: PyBindGen 0.8
by Gustavo Carneiro 10 Mar '22

10 Mar '22

The other day I released PyBindGen 0.8. Main news is that it features a new experimental header file scanner based on pygccxml (i.e., it's similar to py++ in scope, if not in maturity, but does not use boost.pythonunderneath). == What == PyBindGen is a Python module that is geared to generating C/C++ code that binds a C/C++ library for Python. It does so without extensive use of either C++ templates or C pre-processor macros. It has modular handling of C/C++ types, and can be easily extended with Python plugins. The generated code is almost as clean as what a human programmer would write, and does not depend on any library or header files besides Python itself. == Where == https://launchpad.net/pybindgen/ == NEWS == - Support C++ instance attributes through getter/setter methods - Support functions as methods of C++ classes - Support the PyObject* type - Support unsigned int, C strings (char*) (from Mark Lee) - Add basic support for enum types - New experimental automatic module generator based on C/C++ header file scanner and annotations in comments, using pygccxml - Some bug fixes -- Gustavo J. A. M. Carneiro INESC Porto, Telecommunications and Multimedia Unit "The universe is always one step beyond logic." -- Frank Herbert

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C API equivalent to abc.ABCMeta.register?
by Daniel Stutzbach 02 Mar '22

02 Mar '22

I'm the author of an extension module (blist) that provides a type that fits the MutableSequence API. Is there a canonical way for me to register the type as a MutableSequence from the C API? -- Daniel Stutzbach, Ph.D. President, Stutzbach Enterprises, LLC <http://stutzbachenterprises.com>

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Software Development - Application Development - Game Development
by Gary 10 Jan '22

10 Jan '22

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Re: [capi-sig] Is it ok to call PyBaseType_Object.tp_new from external code?
by Serhiy Storchaka 19 Oct '17

19 Oct '17

03.10.17 18:04, Łukasz Jagielski пише: > I've noticed that when calling PyBaseObject_Type.tp_new ( > https://github.com/python/cpython/blob/master/Objects/typeobject.c#L3608), > function excess_args is immediately called which assumes its first > parameter is a tuple. Problem is that tuple struct is bigger that Py_None, > correct me if I'm wrong. I've noticed code in swig which calls object_new > with both args and kwds being Py_None and reported an issue > for it (https://github.com/swig/swig/issues/1109). The question is whether > it's ok to call tp_new on a given PyTypeObject but the second > and third param should always be a tuple and a dict or should some other > api function be called instead? args should be a tuple, kwds should be NULL or a dict.

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Is it ok to call PyBaseType_Object.tp_new from external code?
by Łukasz Jagielski 03 Oct '17

03 Oct '17

Hi, I've noticed that when calling PyBaseObject_Type.tp_new ( https://github.com/python/cpython/blob/master/Objects/typeobject.c#L3608), function excess_args is immediately called which assumes its first parameter is a tuple. Problem is that tuple struct is bigger that Py_None, correct me if I'm wrong. I've noticed code in swig which calls object_new with both args and kwds being Py_None and reported an issue for it (https://github.com/swig/swig/issues/1109). The question is whether it's ok to call tp_new on a given PyTypeObject but the second and third param should always be a tuple and a dict or should some other api function be called instead? Thanks, Łukasz

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