capi-sig March 2020

capi-sig@python.org

5 participants
6 discussions

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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Mail l8st
by casperssidekick 10 Jul '21

10 Jul '21

Sent from my Verizon, Samsung Galaxy smartphone

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Trying to embed Py3.8 w frozen modules -- correct place to seek help?
by Katie Lucas 07 Mar '20

07 Mar '20

Hello. I'm trying to embed a Py3.8 interpreter into a C++ application to use as the "glue" for all the other components. We've come across some complexities -- revolving around the use of frozen modules and multiple interpreter states -- and I'm wondering if this is the correct list to seek some assistance? We can get a single interpreter running. We can add our stream objects and capture the output, we can load our modules (giving the API access) into it and generally everything seems fairly happy in single interp mode. When we try and run a Py_NewInterpreter() to get us more interps to get encapsulation between multiple scripts, it fails to launch (fails to get filesystem's codec). The problem seems to be that the frozen modules added to the launched interpreter are not cached after use. So the cloned interpreter fails to start (it wants either an encoder search path which is null for no filesystem OR to have the encodings module available). The modules don't seem to be being cached because when the import runs them with PyEval_EvalCode, they return nothing. I suspect this is something I've missed about how to configure the original interpreter, but documentation & use-examples for the new split-phase initialisation are rather hard to find. Cheers for any help you can provide, Katie

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capi-sig March 2020