Mailman 3 June 2010 - 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

3 3

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

2 1

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>

3 2

Re: [capi-sig] PyRun_InteractiveOne from string?
by Dave Brotherstone 15 Jun '10

15 Jun '10

Thanks so much.. that looks like exactly what I want to do. Looks like you've done a fantastic job on the integration there - makes my weedy little console look very plain :) Just need to work out why boost::python won't exec code.InteractiveConsole() now :) Thanks again. Dave. On Thu, Jun 10, 2010 at 9:29 PM, Campbell Barton <ideasman42(a)gmail.com>wrote: > In blender 2.5 we have an interactive console with multi-line support > and auto complete. > Demo of using the console > > http://sites.google.com/site/satishgoda/blender/learningblender25/introduct… > > Heres the script which interfaces python and blenders generic console > api, look at how it uses the 'code' module. > > http://www.google.com/codesearch/p?hl=en#J_CGftyjihw/release/scripts/op/con… > > We do our own line editing functionality but basically you can use the > code module like this > import code > namespace = {'__builtins__': __builtins__} > code.InteractiveConsole(namespace) > is_multiline = console.push(line_exec) # <--- this is the line you > need to run in a loop and give user input to. > > even though you mention not having a console, for the record that can > be done like this... > PyRun_String("__import__('code').interact()", Py_eval_input, > namespace, namespace); > > On Thu, Jun 10, 2010 at 8:59 PM, Dave Brotherstone <davegb(a)pobox.com> > wrote: > > Hi, > > > > I hope I'm asking this in the right place... I've embedded Python in an > > application, and I'm now trying to emulate a "console" for immediate > > commands. I can see PyRun_InteractiveOneFlags and the variants are used > to > > send single statements, but there doesn't seem to be any variants that > take > > a string, only a FILE*. I'm in a windows app, so there's no console. (I > > actually have effectively two text boxes, one multi-line read only for > > stdout/stderr, and one input.), I know the prompt would be in the wrong > > place, but that's no biggie. > > > > PyRun_String does almost what I want, except that it fails on multiline > > statements (if ... : etc). > > > > I just wanted to check if there's an API I've missed, or, whether anyone > can > > recommend an approach. > > > > I think I could either: > > a) Emulate the console through an FILE* - not sure quite how this works > in > > Windows, but I'm sure it's possible > > b) Copy what PyRun_InteractiveOneFlags() does, just replacing > > the PyParser_ASTFromFile with PyParser_ASTFromString. Only problem here > is > > that I seem to need mod_ty, and not sure whether it's a good idea to use > > something that looks like an internal type. > > > > Many thanks for any comments. > > > > Dave. > > _______________________________________________ > > capi-sig mailing list > > capi-sig(a)python.org > > http://mail.python.org/mailman/listinfo/capi-sig > > > > > > -- > - Campbell > _______________________________________________ > capi-sig mailing list > capi-sig(a)python.org > http://mail.python.org/mailman/listinfo/capi-sig >

2 2

Linking with a static python library.
by F van der Meeren 15 Jun '10

15 Jun '10

Hi, I am trying to figure out, what files to copy with my app so I am able to initialize the python runtime. Where can I find information about this? Thank you, Filip

2 1

PyRun_InteractiveOne from string?
by Dave Brotherstone 10 Jun '10

10 Jun '10

Hi, I hope I'm asking this in the right place... I've embedded Python in an application, and I'm now trying to emulate a "console" for immediate commands. I can see PyRun_InteractiveOneFlags and the variants are used to send single statements, but there doesn't seem to be any variants that take a string, only a FILE*. I'm in a windows app, so there's no console. (I actually have effectively two text boxes, one multi-line read only for stdout/stderr, and one input.), I know the prompt would be in the wrong place, but that's no biggie. PyRun_String does almost what I want, except that it fails on multiline statements (if ... : etc). I just wanted to check if there's an API I've missed, or, whether anyone can recommend an approach. I think I could either: a) Emulate the console through an FILE* - not sure quite how this works in Windows, but I'm sure it's possible b) Copy what PyRun_InteractiveOneFlags() does, just replacing the PyParser_ASTFromFile with PyParser_ASTFromString. Only problem here is that I seem to need mod_ty, and not sure whether it's a good idea to use something that looks like an internal type. Many thanks for any comments. Dave.

2 1

set default encoding in C program
by Shaun Savage 10 Jun '10

10 Jun '10

I have to have Unicode strings in my program. Trying to set the default encoding to utf-8 is a pain. (another *RANT*). the way i was thinking about doing it is create a sitecustomization.py in the directory that the executable is in. That does not work. I can not change site.py or sitecustomization.py. How do you set the default encoding to 'utf-8'? shaun

4 3

Re: [capi-sig] capi-sig Digest, Vol 35, Issue 4
by Shaun Savage 05 Jun '10

05 Jun '10

sorry about the attachment On 06/05/2010 06:00 PM, capi-sig-request(a)python.org wrote: > Next problems, (and hope last) > > I have started some Python threads, and want to wait for them to finish. > > I wrote this program to demonstrate my problem. I am on a 64 bit > machine, Ubuntu. > > I tried playing around with GIL state but it does not change anything, > so it is commented out. > > when using pthreads it works (of course) > when I use python threads the sleep does not work and the threads all > exit on the _join > > ------------------------------ > > _______________________________________________ > capi-sig mailing list > capi-sig(a)python.org > http://mail.python.org/mailman/listinfo/capi-sig > > > End of capi-sig Digest, Vol 35, Issue 4 > *************************************** > #include <Python.h> #include <pthread.h> #include <time.h> #include <stdio.h> typedef struct _thrdStruct { int num; pthread_t self; } thrdStruct; void* thrdFunc( void *p ) { thrdStruct *thrd = ( thrdStruct* ) p; thrd->self = pthread_self(); //PyGILState_STATE gstate = PyGILState_Ensure(); printf( "THRD %d\n", thrd->num); //Py_BEGIN_ALLOW_THREADS sleep(15); //Py_END_ALLOW_THREADS //PyGILState_Release(gstate); return NULL; } int main( int argc, char *argv[] ) { thrdStruct thrds[10]; pthread_t self[10] = {0}; int rv, i; void *stat; PyGILState_STATE gstate; Py_Initialize(); PyEval_InitThreads(); gstate = PyGILState_Ensure(); for (i=0;i<10;i++) { thrds[i].num = i; rv = PyThread_start_new_thread( thrdFunc, &thrds[i] ); //rv = pthread_create( &self[i], NULL, thrdFunc, &thrds[i] ); } PyGILState_Release(gstate); //Py_BEGIN_ALLOW_THREADS sleep(1); //Py_END_ALLOW_THREADS for (i=0;i<10;i++) { if ( self[i] != thrds[i].self ) printf( "%d %x %x\n", i, self[i], thrds[i].self); } for (i=0;i<10;i++) { rv = pthread_join( thrds[i].self, &stat ); } Py_Finalize(); }

1 0

PyThreads and pthreads
by Shaun Savage 05 Jun '10

05 Jun '10

Next problems, (and hope last) I have started some Python threads, and want to wait for them to finish. I wrote this program to demonstrate my problem. I am on a 64 bit machine, Ubuntu. I tried playing around with GIL state but it does not change anything, so it is commented out. when using pthreads it works (of course) when I use python threads the sleep does not work and the threads all exit on the _join

1 0