Mailman 3 September 2011 - capi-sig

ANN: expy 0.6.5 released!
by Yingjie Lan April 16, 2022

April 16, 2022

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 March 10, 2022

March 10, 2022

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 March 2, 2022

March 2, 2022

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 Jan. 10, 2022

Jan. 10, 2022

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getting popen error after long term use
by Simon Kiertscher Sept. 8, 2011

Sept. 8, 2011

Hi all, I hope I post on the correct list, sorry if not. I have written a C-daemon and I use the C/Python API for calling bash commands via python using popen. My daemon seems to run without errors, but after a unknown period of time (sometimes the daemon runs a week without problems, sometimes a month) the program isn't able to run the python scripts any more. I get the following error: Exception exceptions.AttributeError: "'Popen' object has no attribute '_child_created'" in <bound method Popen.__del__ of <subprocess.Popen object at 0x2aaaaf1fa910>> ignored I googled the error but didn't get smarter. So I have no idea if the error is on the python site or on the c site. And I have no idea why the error occurs after a long time of run. I would think (because of the unknown time fact) there is a memory leak or something like that, what else could it be? Has anyone an idea would I could do wrong? My c calls look like that: int shutdown(const char *node_address, struct content *content) { assert(node_address != NULL); PyObject *funk, *prm, *ret; funk = PyObject_GetAttrString(content->modul, "shutdown"); if(funk == NULL) { syslog(LOG_ERR, "[MASTER] [shutdown] CANT LOAD SHUTDOWN FROM %s.PY",content->scriptname); return(EXIT_FAILURE); } prm = Py_BuildValue("(s)", node_address); if(prm == NULL) { Py_CLEAR(funk); syslog(LOG_ERR, "[MASTER] [shutdown] CANT BUILD VALUE"); return(EXIT_FAILURE); } ret = PyObject_CallObject(funk, prm); if(ret == NULL) { Py_CLEAR(funk); Py_CLEAR(ret); syslog(LOG_ERR, "[MASTER] [shutdown] CANT CALL FUNCTION OBJECT"); return(EXIT_FAILURE); } if(PyInt_AsLong(ret)!=0) { Py_CLEAR(prm); Py_CLEAR(funk); Py_CLEAR(ret); syslog(LOG_ERR, "[MASTER] [shutdown] ERROR ON PyInt_AsLong"); return(EXIT_FAILURE); } Py_CLEAR(ret); Py_CLEAR(prm); Py_CLEAR(funk); return EXIT_SUCCESS; } And my Python calls look like that: def shutdown(node_address): p = subprocess.Popen(["ipmitool","-l", "LAN", "-H",node_address,"-U", "root", "-P", config.IPMIPassword, "power", "soft"],stdout=subprocess.PIPE, stderr=subprocess.PIPE) p.communicate() return p.returncode When I kill the daemon after noticing that it can't call he functions any more, I get the following errors in addition: Exception exceptions.IndexError: 'list index out of range' in 'garbage collection' ignored Fatal Python error: unexpected exception during garbage collection I strongly hope someone has an idea about that. Sorry for the bad English. Best Regards, Simon

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