Mailman 3 September 2006 - Cplusplus-sig

how to wrap multi c++ files into python by pyste?
by Qinfeng(Javen) Shi Sept. 14, 2006

Sept. 14, 2006

Dear all, I know how to wrap a single c++ file into python by pyste? Does anybody how to wrap many c++ files into several *.so? We can't wrap every single file seperately because some types and functions used in it may be delared in other file. And puting everything into a huge single file is a ugly thing. Best wishes! Javen Research School of Information Sciences and Engineering Australian National University Locked Bag 8001 Canberra ACT 2601

2 1

extract character from PyObject (c++)
by Markus Heller Sept. 13, 2006

Sept. 13, 2006

Dear List, I have this: a c++ PyObject which contains a unicode string. How can I isolate the individual unicode symbols from the string? Does anybody have sample code? Unfortunately I have only partly understood the definitions as given here: http://docs.python.org/api/unicodeObjects.html Thanks a lot! Markus

1 0

Help about warning C4541 in using VC7.1
by jack833 Sept. 13, 2006

Sept. 13, 2006

Here is My code . but show out warnning C4541 in VC7.1 namespace Unitest { namespace UTester { class UTester { public: UTester(){} virtual ~UTester(){} std::string Foo(){return "FOO";} }; } } warnning show: E:\ProgramFiles\Microsoft Visual Studio.NET 2003\Vc7\Boost\include\boost\python\object\inheritance.hpp(43) : warning C4541: “dynamic_cast”using option /GR- at a Polymorphism “Unitest::UTester::UTester”；May be result in unpredictable behavior. E:\ProgramFiles\Microsoft Visual Studio.NET 2003\Vc7\Boost\include\boost\python\object\inheritance.hpp(41) : while compile template class member function“boost::python::objects::dynamic_id_t boost::python::objects::polymorphic_id_generator<T>::execute(void *)” with [ T=Unitest::UTester::UTester ] can any one help me? -- View this message in context: http://www.nabble.com/Help-about-warning-C4541-in-using-VC7.1-tf2259871.htm… Sent from the Python - c++-sig forum at Nabble.com.

2 2

Re: [C++-sig] Py++ generated code ( was custom smart pointers )
by Roman Yakovenko Sept. 13, 2006

Sept. 13, 2006

On 9/12/06, David Abrahams <dave(a)boost-consulting.com> wrote: > A minimal example would have no "documentation" stringsno use of > named arguments (bp::arg(...)) and no use of things that you get by > default anyway, like default_call_policies. It would not contain > extraneous implicit conversions from int. This is a problem with many > code generators: they create an unreadable mess for anyone who wants > to understand the result. Part of the reason many people despise the > MFC Wizards. I suggest you fix Py++ so it doesn't add vacuous > "documentation" and other needless cruft. 1. Documentation was my fault. By default Py++ does not generate it. 2. default call policies is not generated anymore 3. implicit conversion - well, Py++ tries to generate as "complete code" as possible. This is done for few reasons: * educational reasons, new users to Boost.Python can learn a lot from Py++ generated code. Py++ even has gui: http://language-binding.net/pyplusplus/tutorials/pyplusplus_demo.png * to minimize size of driving script * to minimize Py++ learning curve This case is a little bit special, because a "bug" in C++. Constructors in C++ should be explicit by default. The bottom line is that I turned off generation of "implicit conversion" for constructors. In general, Py++ generates very readable code. -- Roman Yakovenko C++ Python language binding http://www.language-binding.net/

2 1

ImportError for boost.python tutorial
by Gordon Blackshields Sept. 13, 2006

Sept. 13, 2006

Hi everyone, I found this post made back in march in an attempt to get started with boost.python using mingw, after unsuccessfully trying the seemingly very simple example given in the tutorial ("hello.cpp"). After following the advice given in the link (creating the libpython24.a file and so on using pexports and dlltool and so on) but I'm still hitting a brick wall when trying to get the module imported in the interpreter. ("ImportError: dynamic module does not define init function (inithello)") I have the .dll and .pyd files made ok, but pexports shows that hello.pyd isn't exporting inithello as expected. Are there other underlying causes for this import error that i'm just not seeing? The original post that I found is below (the post was cunningly entitled "Problem") Thanks in advance, Gordon Hi, I am not sure this will solve your problem but just in case... I also had similar problems at the beginning. The problem was that the python library shipped with Python installation only works with Microsoft compatible link and I was using, as you do, mingw (gcc). In http://www.boost.org/libs/python/doc/building.html#mingw you will find a detail explanation of what happens and how to solve it. It's really simple. Hope this will help... It is really frustrating at the beginning but once it starts working... boost::python is wonderful! Best Regards, Pedro. > Hi, > I'm trying to build the basic boost.python tutorial that comes with the > distribution. I'm using bjam and mingw. It builds the module, but > upon import, it gives this error: > > ImportError: dynamic module does not define init function (inithello) > > I've found other threads with this problem as a topic, but no > solutions. Somebody has to have solved this.... > > Any ideas? > > Thanks, > -Justin > > OH yeah, I'm using Active Python (perhaps that's it?) -- Pedro -- _______________________________________________ For the largest FREE email in Ireland (25MB) and 20MB of online file storage space - Visit http://www.campus.ie

2 1

New Patch for opaque_pointer_converter
by Gottfried Ganßauge Sept. 12, 2006

Sept. 12, 2006

Please find attached a completely new patch against the current CVS Head. This incorporates my patch from earlier today into the CVS Head. Further I implemented cross module support in so far as the converter registers itself only if not another module already has registered the same converter before. The opaque test case has been update to check for the segmentation fault mentioned in my previous post. A test case for the cross module support is included (crossmod_opaque). I also updated the documentation for opaque. I tested my patch with - GCC-4.1 running on GNU/Linux 2.6.16.21-0.13-default x86_64 - Visual-C++-6.5 running on Windows XP - Visual-C++-7.1 running on Windows XP The patch is applied by calling patch -p1 < opaque_patch in the root of the boost hierarchy. Files patched are: boost_head/boost/python/opaque_pointer_converter.hpp boost_head/libs/python/doc/v2/opaque.html boost_head/libs/python/doc/v2/opaque_pointer_converter.html boost_head/libs/python/doc/v2/reference.html boost_head/libs/python/doc/v2/return_opaque_pointer.html boost_head.orig/libs/python/test/crossmod_opaque_a.cpp boost_head/libs/python/test/crossmod_opaque_a.cpp boost_head/libs/python/test/crossmod_opaque_b.cpp boost_head/libs/python/test/crossmod_opaque.py boost_head/libs/python/test/Jamfile boost_head/libs/python/test/Jamfile.v2 boost_head/libs/python/test/opaque.py Enjoy ... Gottfried diff -r -x 'Entries*' -x .jamdeps -x '*.test' -x '*.run' -x '*.output' -x '*.o' -x '*.so' -uN boost_head.orig/boost/python/opaque_pointer_converter.hpp boost_head/boost/python/opaque_pointer_converter.hpp --- boost_head.orig/boost/python/opaque_pointer_converter.hpp 2006-02-12 17:09:08.000000000 +0100 +++ boost_head/boost/python/opaque_pointer_converter.hpp 2006-09-09 01:29:10.942429483 +0200 @@ -1,4 +1,4 @@ -// Copyright Gottfried Ganßauge 2003. +// Copyright Gottfried Ganßauge 2003..2006. // Distributed under the Boost Software License, Version 1.0. (See // accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) @@ -11,6 +11,7 @@ # include <boost/python/detail/prefix.hpp> # include <boost/python/lvalue_from_pytype.hpp> # include <boost/python/to_python_converter.hpp> +# include <boost/python/converter/registrations.hpp> # include <boost/python/detail/dealloc.hpp> # include <boost/python/detail/none.hpp> # include <boost/python/type_id.hpp> @@ -44,9 +45,16 @@ { opaque() { - type_object.tp_name = const_cast<char*>(type_id<Pointee*>().name()); - converter::registry::insert(&extract, type_id<Pointee>()); - converter::registry::insert(&wrap, type_id<Pointee*>()); + if (type_object.tp_name == 0) + { + type_object.tp_name = const_cast<char*>(type_id<Pointee*>().name()); + if (PyType_Ready (&type_object) < 0) + { + throw error_already_set(); + } + + register_self(); + } } static opaque instance; @@ -78,6 +86,17 @@ } } + void register_self() { + converter::registration const *existing = + converter::registry::query (type_id<Pointee*>()); + + if ((existing == 0) || (existing->m_to_python == 0)) + { + converter::registry::insert(&extract, type_id<Pointee>()); + converter::registry::insert(&wrap, type_id<Pointee*>()); + } + } + struct python_instance { PyObject_HEAD diff -r -x 'Entries*' -x .jamdeps -x '*.test' -x '*.run' -x '*.output' -x '*.o' -x '*.so' -uN boost_head.orig/libs/python/doc/v2/opaque.html boost_head/libs/python/doc/v2/opaque.html --- boost_head.orig/libs/python/doc/v2/opaque.html 1970-01-01 01:00:00.000000000 +0100 +++ boost_head/libs/python/doc/v2/opaque.html 2006-09-09 01:15:56.899776733 +0200 @@ -0,0 +1,134 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> + +<html> + <head> + <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> + <link rel="stylesheet" type="text/css" href="../boost.css"> + + <title>Boost.Python - <boost/python/opaque_pointer_converter.hpp></title> + </head> + + <body> + <table border="0" cellpadding="7" cellspacing="0" width="100%" summary= + "header"> + <tr> + <td valign="top" width="300"> + <h3><a href="../../../../index.htm"><img height="86" width="277" + alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3> + </td> + + <td valign="top"> + <h1 align="center"><a href="../index.html">Boost.Python</a></h1> + + <h2 align="center">Header + <boost/python/opaque_pointer_converter.hpp></h2> + </td> + </tr> + </table> + <hr> + + <h2>Contents</h2> + + <dl class="page-index"> + <dt><a href="#classes">Classes</a></dt> + + <dd> + <dl class="page-index"> + <dt><a href="#opaque-spec">Class template + <code>opaque<Pointee></code></a></dt> + + <dd> + <dl class="page-index"> + <dt><a href="#opaque-spec-synopsis">Class template + <code>opaque</code> synopsis</a></dt> + </dl> + </dd> + </dl> + </dd> + + <dt><a href="#macros">Macros</a></dt> + <dd> + <dl class="page-index"> + <dt><a href="#BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID-spec">Macro + <code>BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID</code></a></dt> + </dl> + </dd> + + <dt><a href="#see-also">See Also</a></dt> + </dl> + <hr> + + <h2><a name="classes"></a>Classes</h2> + + <h3><a name="opaque-spec"></a>Class template + <code>opaque<P></code></h3> + + <p><code>opaque<></code> registers itself as a converter from + Python objects to pointers to undefined types and vice versa.</p> + + <h4><a name="opaque-spec-synopsis"></a>Class template + <code>opaque</code> synopsis</h4> +<pre> +namespace boost { namespace python +{ + template<class Pointee> + struct opaque + { + opaque(); + }; +}} +</pre> + + <h4><a name="opaque-spec-constructor"></a>Class template + <code>opaque</code> constructor</h4> +<pre> +opaque(); +</pre> + + <dl class="function-semantics"> + <dt><b>Effects:</b> + <ul> + <li>Registers the instance as a + <a href="lvalue_from_pytype.html#lvalue_from_pytype-spec"> <code>lvalue_from_pytype</code></a> + converter from Python objects into opaque pointers.</p> + <p>The Python Objects created are named after the type pointed to + by the opaque pointer being wrapped.</p></li> + <li>Registers the instance as a + <a href="to_python_converter.html#to_python_converter-spec"> <code>to_python_converter</code></a> + from opaque pointers to Python objects.</p></li> + </ul> + <p>If there is already an instance registered by another module, this + instance doesn't try to register again in order to avoid warnings + about multiple registrations.</p> + + <h4>Note</h4> + <p>Normally only a single instance of this class is created for every + Pointee.</p> + </dt> + </dl> + + <h2><a name="macros"></a>Macros</h2> + + <h3><a name="BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID-spec"></a> + Macro BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID(Pointee)</h3> + <p>This macro must be used to define specializations of the + <a href="type_id.html#type_id-spec">type_id</a> function + which can't be instantiated for incomplete types.</p> + <h4>Note</h4> + <p>The macro must be invoked in every translation unit which uses the + opaque converter.</p> + + <h2><a name="see-also"></a>See Also</h2> + <p> + <a href="return_opaque_pointer.html">return_opaque_pointer</a> + </p> + + <p>Revised + 10 September, 2006 + </p> + + <p><i>© Copyright 2003..2006 Haufe Mediengruppe. All Rights + Reserved.</i></p> + </body> +</html> + diff -r -x 'Entries*' -x .jamdeps -x '*.test' -x '*.run' -x '*.output' -x '*.o' -x '*.so' -uN boost_head.orig/libs/python/doc/v2/opaque_pointer_converter.html boost_head/libs/python/doc/v2/opaque_pointer_converter.html --- boost_head.orig/libs/python/doc/v2/opaque_pointer_converter.html 2005-08-03 14:20:42.000000000 +0200 +++ boost_head/libs/python/doc/v2/opaque_pointer_converter.html 1970-01-01 01:00:00.000000000 +0100 @@ -1,142 +0,0 @@ -<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> - -<html> - <head> - <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> - <link rel="stylesheet" type="text/css" href="../boost.css"> - - <title>Boost.Python - <boost/python/opaque_pointer_converter.hpp></title> - </head> - - <body> - <table border="0" cellpadding="7" cellspacing="0" width="100%" summary= - "header"> - <tr> - <td valign="top" width="300"> - <h3><a href="../../../../index.htm"><img height="86" width="277" - alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3> - </td> - - <td valign="top"> - <h1 align="center"><a href="../index.html">Boost.Python</a></h1> - - <h2 align="center">Header - <boost/python/opaque_pointer_converter.hpp></h2> - </td> - </tr> - </table> - <hr> - - <h2>Contents</h2> - - <dl class="page-index"> - <dt><a href="#classes">Classes</a></dt> - - <dd> - <dl class="page-index"> - <dt><a href="#opaque_pointer_converter-spec">Class template - <code>opaque_pointer_converter<P></code></a></dt> - - <dd> - <dl class="page-index"> - <dt><a href="#opaque_pointer_converter-spec-synopsis">Class template - <code>opaque_pointer_converter</code> synopsis</a></dt> - </dl> - </dd> - </dl> - </dd> - - <dt><a href="#macros">Macros</a></dt> - <dd> - <dl class="page-index"> - <dt><a href="#BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID-spec">Macro - <code>BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID</code></a></dt> - </dl> - </dd> - - <dt><a href="#examples">Example</a></dt> - - <dt><a href="#see-also">See Also</a></dt> - </dl> - <hr> - - <h2><a name="classes"></a>Classes</h2> - - <h3><a name="opaque_pointer_converter-spec"></a>Class template - <code>opaque_pointer_converter<P></code></h3> - - <p><code>opaque_pointer_converter<></code> is derived from - <a href="to_python_converter.html#to_python_converter-spec"> - <code>to_python_converter</code></a> - and registers itself as an - <a href="lvalue_from_pytype.html#lvalue_from_pytype-spec"> - <code>lvalue_from_pytype</code></a> converter from Python objects - into pointers to undefined types. - Thus it may be used as a converter from opaque pointers into - Python objects and vice versa.</p> - - <h4><a name="opaque_pointer_converter-spec-synopsis"></a>Class template - <code>opaque_pointer_converter</code> synopsis</h4> -<pre> -namespace boost { namespace python -{ - template<class Pointer> - struct opaque_pointer_converter - : to_python_converter< - Pointer, opaque_pointer_converter<Pointer> > - { - explicit opaque_pointer_converter(char const* name); - }; -}} -</pre> - - <h4><a name="opaque_pointer_converter-spec-constructor"></a>Class template - <code>opaque_pointer_converter</code> constructor</h4> -<pre> -explicit opaque_pointer_converter(char const* name); -</pre> - - <dl class="function-semantics"> - <dt><b>Effects:</b> - <p>Registers the instance as a - <a href="lvalue_from_pytype.html#lvalue_from_pytype-spec"> - <code>lvalue_from_pytype</code></a> converter from Python objects - into opaque pointers.</p> - <p>The name is used for the type of the Python Objects created; - it should be printable but needn't be an - <a href="definitions.html#ntbs">ntbs</a> because the object type is - not supposed to be user constructible within python scripts.</p> - </dt> - </dl> - - <h2><a name="macros"></a>Macros</h2> - - <h3><a name="BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID-spec"></a> - Macro BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID(Pointee)</h3> - <p>This macro must be used to define specializations of the - <a href="type_id.html#type_id-spec">type_id</a> function - which can't be instantiated for incomplete types.</p> - <h4>Note</h4> - <p>In order for this to work in a cross-module environment the macro must - be invoked in every translation unit which uses the - opaque_pointer_converter.</p> - - <h2><a name="examples"></a>Example</h2> - - please see example for <a href="return_opaque_pointer.html#examples"> - return_opaque_pointer</a>. - - <h2><a name="see-also"></a>See Also</h2> - <p> - <a href="return_opaque_pointer.html">return_opaque_pointer</a> - </p> - - <p>Revised - 10 March, 2003 - </p> - - <p><i>© Copyright 2003 Haufe Mediengruppe. All Rights - Reserved.</i></p> - </body> -</html> - diff -r -x 'Entries*' -x .jamdeps -x '*.test' -x '*.run' -x '*.output' -x '*.o' -x '*.so' -uN boost_head.orig/libs/python/doc/v2/reference.html boost_head/libs/python/doc/v2/reference.html --- boost_head.orig/libs/python/doc/v2/reference.html 2006-01-16 21:37:23.000000000 +0100 +++ boost_head/libs/python/doc/v2/reference.html 2006-09-09 01:15:09.923641734 +0200 @@ -904,26 +904,26 @@ </dd> <dt><a href= - "opaque_pointer_converter.html">opaque_pointer_converter.hpp</a></dt> + "opaque.html">opaque_pointer_converter.hpp</a></dt> <dd> <dl class="index"> <dt><a href= - "opaque_pointer_converter.html#classes">Classes</a></dt> + "opaque.html#classes">Classes</a></dt> <dd> <dl class="index"> <dt><a href= - "opaque_pointer_converter.html#opaque_pointer_converter-spec">opaque_pointer_converter</a></dt> + "opaque.html#opaque-spec">opaque</a></dt> </dl> </dd> - <dt><a href="opaque_pointer_converter.html#macros">Macros</a></dt> + <dt><a href="opaque.html#macros">Macros</a></dt> <dd> <dl class="index"> <dt><a href= - "opaque_pointer_converter.html#BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID-spec"> + "opaque.html#BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID-spec"> BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID</a></dt> </dl> </dd> diff -r -x 'Entries*' -x .jamdeps -x '*.test' -x '*.run' -x '*.output' -x '*.o' -x '*.so' -uN boost_head.orig/libs/python/doc/v2/return_opaque_pointer.html boost_head/libs/python/doc/v2/return_opaque_pointer.html --- boost_head.orig/libs/python/doc/v2/return_opaque_pointer.html 2004-10-05 17:45:46.000000000 +0200 +++ boost_head/libs/python/doc/v2/return_opaque_pointer.html 2006-09-09 01:17:07.269985049 +0200 @@ -67,7 +67,7 @@ undefined types such that the return value is copied into a new Python object.</p> <p>In addition to specifying the <code>return_opaque_pointer</code> - policy the <a href="opaque_pointer_converter.html#BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID-spec"> + policy the <a href="opaque.html#BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID-spec"> <code>BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID</code></a> macro must be used to define specializations for the <a href="type_id.html#type_id-spec">type_id</a> function @@ -174,8 +174,8 @@ <h2><a name="see-also"></a>See Also</h2> <p> - <a href="opaque_pointer_converter.html"> - opaque_pointer_converter</a> + <a href="opaque.html"> + opaque</a> </p> <p>Revised diff -r -x 'Entries*' -x .jamdeps -x '*.test' -x '*.run' -x '*.output' -x '*.o' -x '*.so' -uN boost_head.orig/libs/python/test/crossmod_opaque_a.cpp boost_head/libs/python/test/crossmod_opaque_a.cpp --- boost_head.orig/libs/python/test/crossmod_opaque_a.cpp 1970-01-01 01:00:00.000000000 +0100 +++ boost_head/libs/python/test/crossmod_opaque_a.cpp 2006-09-09 01:27:49.269150496 +0200 @@ -0,0 +1,26 @@ +// Copyright Gottfried Ganßauge 2006. +// Distributed under the Boost Software License, Version 1.0. (See +// accompanying file LICENSE_1_0.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt) +# include <boost/python/return_opaque_pointer.hpp> +# include <boost/python/def.hpp> +# include <boost/python/module.hpp> +# include <boost/python/return_value_policy.hpp> + +typedef struct opaque_ *opaque; + +opaque the_op = ((opaque) 0x47110815); + +opaque get() { return the_op; } + +BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID(opaque_) + +namespace bpl = boost::python; + +BOOST_PYTHON_MODULE(crossmod_opaque_a) +{ + bpl::def ( + "get", + &::get, + bpl::return_value_policy<bpl::return_opaque_pointer>()); +} diff -r -x 'Entries*' -x .jamdeps -x '*.test' -x '*.run' -x '*.output' -x '*.o' -x '*.so' -uN boost_head.orig/libs/python/test/crossmod_opaque_b.cpp boost_head/libs/python/test/crossmod_opaque_b.cpp --- boost_head.orig/libs/python/test/crossmod_opaque_b.cpp 1970-01-01 01:00:00.000000000 +0100 +++ boost_head/libs/python/test/crossmod_opaque_b.cpp 2006-09-09 01:27:59.984268728 +0200 @@ -0,0 +1,26 @@ +// Copyright Gottfried Ganßauge 2006. +// Distributed under the Boost Software License, Version 1.0. (See +// accompanying file LICENSE_1_0.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt) +# include <boost/python/return_opaque_pointer.hpp> +# include <boost/python/def.hpp> +# include <boost/python/module.hpp> +# include <boost/python/return_value_policy.hpp> + +typedef struct opaque_ *opaque; + +opaque the_op = ((opaque) 0x47110815); + +opaque get() { return the_op; } + +BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID(opaque_) + +namespace bpl = boost::python; + +BOOST_PYTHON_MODULE(crossmod_opaque_b) +{ + bpl::def ( + "get", + &::get, + bpl::return_value_policy<bpl::return_opaque_pointer>()); +} diff -r -x 'Entries*' -x .jamdeps -x '*.test' -x '*.run' -x '*.output' -x '*.o' -x '*.so' -uN boost_head.orig/libs/python/test/crossmod_opaque.py boost_head/libs/python/test/crossmod_opaque.py --- boost_head.orig/libs/python/test/crossmod_opaque.py 1970-01-01 01:00:00.000000000 +0100 +++ boost_head/libs/python/test/crossmod_opaque.py 2006-09-09 01:28:09.835458056 +0200 @@ -0,0 +1,14 @@ +# Copyright Gottfried Ganßauge 2006. +# Distributed under the Boost Software License, Version 1.0. (See +# accompanying file LICENSE_1_0.txt or copy at +# http://www.boost.org/LICENSE_1_0.txt) + +print "running..." + +import crossmod_opaque_a +import crossmod_opaque_b + +crossmod_opaque_a.get() +crossmod_opaque_b.get() + +print "Done." diff -r -x 'Entries*' -x .jamdeps -x '*.test' -x '*.run' -x '*.output' -x '*.o' -x '*.so' -uN boost_head.orig/libs/python/test/Jamfile boost_head/libs/python/test/Jamfile --- boost_head.orig/libs/python/test/Jamfile 2006-03-03 10:08:39.000000000 +0100 +++ boost_head/libs/python/test/Jamfile 2006-09-09 00:24:06.515671506 +0200 @@ -170,6 +170,10 @@ [ bpl-test extract ] +[ +bpl-test crossmod_opaque + : crossmod_opaque.py crossmod_opaque_a.cpp crossmod_opaque_b.cpp +] [ bpl-test opaque ] [ bpl-test voidptr ] diff -r -x 'Entries*' -x .jamdeps -x '*.test' -x '*.run' -x '*.output' -x '*.o' -x '*.so' -uN boost_head.orig/libs/python/test/Jamfile.v2 boost_head/libs/python/test/Jamfile.v2 --- boost_head.orig/libs/python/test/Jamfile.v2 2006-08-24 21:03:35.000000000 +0200 +++ boost_head/libs/python/test/Jamfile.v2 2006-09-09 00:23:20.919424482 +0200 @@ -114,6 +114,10 @@ [ bpl-test extract ] +[ +bpl-test crossmod_opaque + : crossmod_opaque.py crossmod_opaque_a.cpp crossmod_opaque_b.cpp +] [ bpl-test opaque ] [ bpl-test voidptr ] diff -r -x 'Entries*' -x .jamdeps -x '*.test' -x '*.run' -x '*.output' -x '*.o' -x '*.so' -uN boost_head.orig/libs/python/test/opaque.py boost_head/libs/python/test/opaque.py --- boost_head.orig/libs/python/test/opaque.py 2003-08-26 15:11:51.000000000 +0200 +++ boost_head/libs/python/test/opaque.py 2006-09-09 01:27:25.419113167 +0200 @@ -1,5 +1,5 @@ # -*- coding: iso-latin-1 -*- -# Copyright Gottfried Ganßauge 2003. Permission to copy, use, +# Copyright Gottfried Ganßauge 2003..2006. Permission to copy, use, # modify, sell and distribute this software is granted provided this # copyright notice appears in all copies. This software is provided # "as is" without express or implied warranty, and with no claim as @@ -66,6 +66,11 @@ >>> try: use2(get()) ... except TypeError: pass ... else: print 'expected a TypeError' + + This used to result in a segmentation violation + +>>> type(get()) != type (get2()) +1 """ def run(args = None): import sys

3 5

PyCode_New and new.code() functions
by anders langlands Sept. 12, 2006

Sept. 12, 2006

Does anyone know how to use either PyCode_New or new.code()?? Specifically I want to use new.code() and new.function() to generate some python functions from strings, which I can then call in python at some later time. My trouble is I can find exactly zero documentation on the use of these functions :( Any help would be greatly appreciated. Cheers, Anders

2 7

[tutorial] Auto-Overloading example bug?
by Roman Yakovenko Sept. 12, 2006

Sept. 12, 2006

Hi. I could be wrong, but it seems to me that the Boost.Python tutorials contains bug. ( http://boost.org/libs/python/doc/tutorial/doc/html/python/functions.html#py…) The compiler ( I use msvc 7.1 ) is not able to compile the code. The main reason is that it can not decide what "f" to select. I mean, it does not know what address it should pass to "def" function. The same thing occurs for BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS. It seems to me that it is right. Some thoughts. I think, that in this case( auto-overloading example ) function "def" should not take reference to function. It should be enough to pass an instance of the constructed class. Same logic could be applied on class_::def method too. -- Roman Yakovenko C++ Python language binding http://www.language-binding.net/

3 7

Is there a way to automatically convert a smart_ptr to a held_type (try 2)
by Allen Bierbaum Sept. 11, 2006

Sept. 11, 2006

Note: I posted this message a very long time ago on this list and still haven't found a solution. Several months ago David suggested that I repost the message again to see if anyone can help out. I am finally getting back to this project so here is the repost. I am wrapping a C++ library with boost.python that has multiple types of smart ptrs for it's objects. It has a ptr<> type that holds the object and provides a ref counting interface (through and addRef()/subRef() interface). It then has a ref_ptr<> type that acts like a "standard" smart pointer by holding a ptr<> internally and calling the ref handling operations upon construction and destruction. To correctly handle the memory for the objects, I want my boost.python class wrappers for a class T to be held using ref_ptr<T>. I can do this with: class_<T, bases<...>, ref_ptr<T> >("T",...); This all works fine. I run into a problem though when I want to use wrapped method that return ptr<>'s to objects instead of a full ref_ptr<>. For example if I wrap a method like this: ptr<Base> createObject() { ... } then when I call this from boost.python it needs to figure out that it should convert the ptr<Base> to a ref_ptr<Base>. I know that I can use register_ptr_to_python<ptr<Base> > to register a to_python converter for the type, but as I understand it this will cause the python wrapper to store the C++ object using a ptr<> type internally. This won't work correctly because it will not do any memory reference counting. What I need is a way to tell boost python that anytime it needs to convert a ptr<Base> to python it should first convert it to a ref_ptr<Base> (using a standard copy constructor in ref_ptr<>) and then use this ref_ptr as the held type like normal. At first I thought that implicitly_convertible<> would help: implicitly_convertible<ptr<Base>, ref_ptr<Base> >(); But this doesn't seem to do anything for me. (this really isn't too surprising since this isn't what implicitly_convertible is for, but it seemed worth a try). Has anyone else ran into anything similar? Any ideas? Thanks, Allen

3 25

RuntimeError: unidentifiable C++ exception
by Qun Cao Sept. 11, 2006

Sept. 11, 2006

Hi Everyone, I created a simple class wrapper like this BOOST_PYTHON_MODULE(PythonTest) { class_<MyClass,boost::noncopyable>("pMyClass", init<char const*>()); } When I try to initialize pMyClass in python, I got this error: Traceback (most recent call last): File "<stdin>", line 1, in ? RuntimeError: unidentifiable C++ exception MyClass is part of a third party GameEngine, I can successfully use it in C++. Can anyone suggest what might went wrong here? Thanks a lot, Qun

3 2