[C++-sig] Problem Compiling Boost.Python Example
Hi, I have trouble compiling the simplest examples with Boost.Python. I hope you could help me find out what I'm doing wrong. I am using Microsoft Visual C++ 2010 on 64-bit Windows 7. I use 64-bit version of Python 2.7.2 from Enthought Python Distribution 7.2-2. I installed Boost as described in "Simplified Build From Source" section of Boost getting started guide, i.e. going to Boost.Build directory and typing: bootstarp .\b2 Boost compiled without errors (except for a warning about MPI). Then I created user-config.jam in my home directory containing the following lines: using msvc : 10.0 ; using python : 2.7 : C:\\Python 27 ; Then I tried compiling the tutorial example, but I got the following messages (and no DLL): C:\Boost\boost_1_49_0\libs\python\example\tutorial> bjam ...patience... ...patience... ...found 1592 targets... ...updating 10 targets... msvc.link.dll ..\..\..\..\bin.v2\libs\python\build\msvc-10.0\debug\threading-multi\boost_python-vc100-mt-gd-1_49.dll Creating library ..\..\..\..\bin.v2\libs\python\build\msvc-10.0\debug\threading-multi\boost_python-vc100-mt-gd-1_49.l ib and object ..\..\..\..\bin.v2\libs\python\build\msvc-10.0\debug\threading-multi\boost_python-vc100-mt-gd-1_49.exp function.obj : error LNK2001: unresolved external symbol __imp__PyErr_Format numeric.obj : error LNK2019: unresolved external symbol __imp__PyErr_Format referenced in function "void __cdecl boost:: python::numeric::`anonymous namespace'::throw_load_failure(void)" (?throw_load_failure@?A0xd5ad2121@numeric@python@boost @@YAXXZ) from_python.obj : error LNK2001: unresolved external symbol __imp__PyErr_Format registry.obj : error LNK2001: unresolved external symbol __imp__PyErr_Format class.obj : error LNK2001: unresolved external symbol __imp__PyErr_Format numeric.obj : error LNK2001: unresolved external symbol __imp__PyExc_ImportError numeric.obj : error LNK2019: unresolved external symbol __imp__PyErr_Clear referenced in function "bool __cdecl boost::p ython::numeric::`anonymous namespace'::load(bool)" (?load@?A0xd5ad2121@numeric@python@boost@@YA_N_N@Z) class.obj : error LNK2001: unresolved external symbol __imp__PyErr_Clear function.obj : error LNK2001: unresolved external symbol __imp__PyErr_Clear object_protocol.obj : error LNK2001: unresolved external symbol __imp__PyErr_Clear numeric.obj : error LNK2019: unresolved external symbol __imp__PyCallable_Check referenced in function "bool __cdecl boo st::python::numeric::`anonymous namespace'::load(bool)" (?load@?A0xd5ad2121@numeric@python@boost@@YA_N_N@Z) class.obj : error LNK2001: unresolved external symbol __imp__PyCallable_Check object_protocol.obj : error LNK2001: unresolved external symbol __imp__PyObject_GetAttrString wrapper.obj : error LNK2001: unresolved external symbol __imp__PyObject_GetAttrString numeric.obj : error LNK2019: unresolved external symbol __imp__PyObject_GetAttrString referenced in function "bool __cde cl boost::python::numeric::`anonymous namespace'::load(bool)" (?load@?A0xd5ad2121@numeric@python@boost@@YA_N_N@Z) enum.obj : error LNK2001: unresolved external symbol __imp__PyObject_GetAttrString class.obj : error LNK2001: unresolved external symbol __imp__PyObject_GetAttrString function.obj : error LNK2001: unresolved external symbol __imp__PyObject_GetAttrString numeric.obj : error LNK2019: unresolved external symbol __imp__PyImport_Import referenced in function "bool __cdecl boos t::python::numeric::`anonymous namespace'::load(bool)" (?load@?A0xd5ad2121@numeric@python@boost@@YA_N_N@Z) numeric.obj : error LNK2019: unresolved external symbol __imp__PyObject_IsInstance referenced in function "public: stati c bool __cdecl boost::python::numeric::aux::array_object_manager_traits::check(struct _object *)" (?check@array_object_m anager_traits@aux@numeric@python@boost@@SA_NPAU_object@@@Z) from_python.obj : error LNK2001: unresolved external symbol __imp__PyObject_IsInstance class.obj : error LNK2001: unresolved external symbol __imp__PyObject_IsInstance enum.obj : error LNK2001: unresolved external symbol __imp__PyEval_CallFunction class.obj : error LNK2001: unresolved external symbol __imp__PyEval_CallFunction pickle_support.obj : error LNK2001: unresolved external symbol __imp__PyEval_CallFunction stl_iterator.obj : error LNK2001: unresolved external symbol __imp__PyEval_CallFunction numeric.obj : error LNK2019: unresolved external symbol __imp__PyEval_CallFunction referenced in function "class boost:: python::api::object __cdecl boost::python::call(struc t _object *,class boost::python::api::object const &,struct boost::type *)" (??$call@V object@api@python@boost@@V1234@@python@boost@@YA?AVobject@api@01@PAU_object@@ABV2301@PAU?$type@Vobject@api@python@boost@ @@1@@Z) list.obj : error LNK2001: unresolved external symbol __imp__PyEval_CallFunction dict.obj : error LNK2001: unresolved external symbol __imp__PyEval_CallFunction str.obj : error LNK2001: unresolved external symbol __imp__PyEval_CallFunction function.obj : error LNK2001: unr
[C++-sig] Boost::Python to_python converter
I'm having a conceptual issue with the way C++ interfaces with Python.
I'm trying to convert a C++ object to a Python object, but my attempt
causes the program to crash. I suspect I'm doing a lot of things
wrong. Ultimately I'd like to be able to pass C++ objects to a python
function that modifies their values.
#include
#include
struct Unit
{
int health;
std::string name;
std::string type;
std::pair coord;
};
struct Unit_to_python
{
static PyObject* convert(Unit const& unit)
{
return boost::python::incref(boost::python::object(unit).ptr());
}
};
BOOST_PYTHON_MODULE(game)
{
boost::python::class_("Unit")
.def_readwrite("health", &Unit::health)
.def_readwrite("name", &Unit::name)
.def_readwrite("type", &Unit::type)
.def_readwrite("coord", &Unit::coord)
;
}
int main(int argc, char** argv)
{
Py_Initialize();
boost::python::to_python_converter();
Unit unit1;
unit1.health = 100;
unit1.name = "Tank";
unit1.type = "Armor";
boost::python::object foo(unit1); // crash: stack overflow
return 0;
}
___
Cplusplus-sig mailing list
Cplusplus-sig@python.org
http://mail.python.org/mailman/listinfo/cplusplus-sig
Re: [C++-sig] Boost::Python to_python converter
DarkAnt, have you tried taking out the explicit to_python converter ? I don't think you need that, as the class_ will already implicitly provide that. Also, out of curiosity: I'm not sure the "coord" member conversion will work out-of-the-box, unless you also reflect std::pair to Python using class_<> or a converter. Stefan -- ...ich hab' noch einen Koffer in Berlin... ___ Cplusplus-sig mailing list Cplusplus-sig@python.org http://mail.python.org/mailman/listinfo/cplusplus-sig
Re: [C++-sig] Boost::Python to_python converter
I removed everything except int health and I still crash. If I do not have the explicit to_python converter I receive this error message: TypeError: No to_python (by-value) converter found for C++ type: Unit On Tue, Apr 3, 2012 at 11:20 AM, Stefan Seefeld wrote: > DarkAnt, > > have you tried taking out the explicit to_python converter ? I don't > think you need that, as the class_ will already implicitly provide > that. > Also, out of curiosity: I'm not sure the "coord" member conversion will > work out-of-the-box, unless you also reflect std::pair to > Python using class_<> or a converter. > > Stefan > > -- > > ...ich hab' noch einen Koffer in Berlin... > ___ Cplusplus-sig mailing list Cplusplus-sig@python.org http://mail.python.org/mailman/listinfo/cplusplus-sig
Re: [C++-sig] Boost::Python to_python converter
DarkAnt,
the problem is that you don't initialize / import the newly defined
module. The attached version works fine for me.
Stefan
--
...ich hab' noch einen Koffer in Berlin...
#include
#include
struct Unit
{
int health;
std::string name;
std::string type;
std::pair coord;
};
namespace bpl = boost::python;
BOOST_PYTHON_MODULE(game)
{
bpl::class_("Unit")
.def_readwrite("health", &Unit::health)
.def_readwrite("name", &Unit::name)
.def_readwrite("type", &Unit::type)
.def_readwrite("coord", &Unit::coord)
;
}
int main(int argc, char** argv)
{
PyImport_AppendInittab( "game", &initgame);
Py_Initialize();
bpl::object module = bpl::import("game");
Unit unit1;
unit1.health = 100;
unit1.name = "Tank";
unit1.type = "Armor";
bpl::object foo(unit1);
std::cout << bpl::extract(bpl::str(foo)) << std::endl;
}
___
Cplusplus-sig mailing list
Cplusplus-sig@python.org
http://mail.python.org/mailman/listinfo/cplusplus-sig
Re: [C++-sig] Boost::Python to_python converter
Thanks a bunch Stefan! On Tue, Apr 3, 2012 at 12:01 PM, Stefan Seefeld wrote: > DarkAnt, > > the problem is that you don't initialize / import the newly defined > module. The attached version works fine for me. > > Stefan > > -- > > ...ich hab' noch einen Koffer in Berlin... > ___ Cplusplus-sig mailing list Cplusplus-sig@python.org http://mail.python.org/mailman/listinfo/cplusplus-sig
Re: [C++-sig] Problem Compiling Boost.Python Example
On Tue, Apr 3, 2012 at 4:12 AM, Payam Shiva wrote: > Hi, > > I have trouble compiling the simplest examples with Boost.Python. I > hope you could help me find out what I'm doing wrong. > I am using Microsoft Visual C++ 2010 on 64-bit Windows 7. I use 64-bit > version of Python 2.7.2 from Enthought Python Distribution 7.2-2. I > installed Boost as described in "Simplified Build From Source" section > of Boost getting started guide, i.e. going to Boost.Build directory > and typing: > bootstarp > .\b2 > > Boost compiled without errors (except for a warning about MPI). Then I > created user-config.jam in my home directory containing the following > lines: > using msvc : 10.0 ; > using python : 2.7 : C:\\Python 27 ; > > Then I tried compiling the tutorial example, but I got the following > messages (and no DLL): > Building Boost.Python can be a real adventure. From where I'm sitting right now, I wouldn't be able to tell you what is wrong because I'm no expert myself. I had recently done a debug build, and wrote down my steps, at home. However, I'm betting you don't really need to build. It looks to me like you're not as concerned with building the DLL as you with just using them. If that is the case, then maybe consider the pre-built libraries you could get here: http://www.boostpro.com/download/ That *should* just work, but you could smash into some odd compatibility stuff with however Enthought built their distribution--then you'd have to build from source. ___ Cplusplus-sig mailing list Cplusplus-sig@python.org http://mail.python.org/mailman/listinfo/cplusplus-sig
Re: [C++-sig] Cplusplus-sig Digest, Vol 43, Issue 2
>It looks to me like you're not as concerned with building the DLL as you with >just > using them. If that is the case, then maybe consider the pre-built > libraries you could get here: > > http://www.boostpro.com/download/ The problem is that my home computer, which I use for development, isn't connected to the internet. Downloading Boost sources from school and building them at home is the only way for me to install Boost, because BoostPro doesn't offer an offline installer. (Well, it does. But only for enterprise customers. That's not an option for me either) ___ Cplusplus-sig mailing list Cplusplus-sig@python.org http://mail.python.org/mailman/listinfo/cplusplus-sig
