Mailman 3 June 2011 - Cplusplus-sig

boost::python embedding error - runtime - Mac OS X - 1.38
by Igor Karpov Oct. 1, 2014

Oct. 1, 2014

Hi, I am trying to run the following program: #include <iostream> #include <Python.h> #include <boost/python.hpp> using namespace boost::python; using namespace std; int main(int argc, char** argv) { { // Using Python/C Py_Initialize(); PyObject* main_module = PyImport_ImportModule("__main__"); PyObject* globals = PyEval_GetGlobals(); PyObject* locals = PyEval_GetLocals(); PyRun_SimpleString("print 'Hello World, from Python/C!'\n"); Py_Finalize(); } { // Using boost::python Py_Initialize(); object main_module = import("__main__"); object main_namespace = main_module.attr("__dict__"); try { object ignored = exec("print 'Hello World, from boost::python!'\n", main_namespace); Py_Finalize(); } catch (error_already_set const& e) { PyErr_Print(); return 1; } } return 0; } on Linux (both x86 and x86_64), with Ubuntu's default version of Boost (1.34.1) installed, I am able to do so as expected: $ ./embed Hello World, from Python/C! Hello World, from boost::python! on Mac OS X, I get a runtime error: $ ./embed Hello World, from Python/C! Bus Error Running with gdb, this is the stack trace: Hello World, from Python/C! Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_PROTECTION_FAILURE at address: 0x00000000 0x00000000 in ?? () (gdb) where #0 0x00000000 in ?? () #1 0x00bb618f in PyEval_GetGlobals () #2 0x00bce0dd in PyImport_Import () #3 0x00bce2b0 in PyImport_ImportModule () #4 0x008127d4 in boost::python::import (name=@0xbffff4a8) at libs/python/src/import.cpp:20 #5 0x00004446 in main (argc=1, argv=0xbffff510) at embed.cc:22 For this Mac, boost version is latest (1.38) and python version is: Python 2.5.4 (r254:67917, Dec 23 2008, 14:57:27) [GCC 4.0.1 (Apple Computer, Inc. build 5363)] on darwin Is this a bug? I attached the source and the cmake file I am using to build, for convenience. Thanks, --Igor.

4 6

CMake and getting starting with boost.python
by Braddock Gaskill Aug. 5, 2011

Aug. 5, 2011

Yesterday I became a boost.python user, after years of heavy SWIG usage. I would have started using boost.python years ago except for the bjam learning curve. I spent hours TRYING on multiple occasions, but got lost every time trying to get the page one example to build with bjam. Here is how to build the "greet" example with a four line CMake file: cat >>CMakeLists.txt <<EOF LINK_LIBRARIES(boost_python) INCLUDE_DIRECTORIES("/usr/include/python2.5") LINK_DIRECTORIES("/usr/lib/python2.5") # Not needed? ADD_LIBRARY(hello SHARED hello.cpp) EOF You WILL have to `mv libhello.so hello.so` after building. Works for me under Ubuntu Linux 6.10 after apt-get install cmake python2.5-dev boost-python-dev cmake make mv libhello.so hello.so ipython In [1]: import hello In [2]: hello.greet() Out[2]: 'hello, world' Boost.Python has been a joy to learn and use since I got past bjam. I had a moderately large API wrapped in just my first couple hours of learning (less time than I spent messing with bjam). Any additional advice for using CMake to build boost.python? Braddock Gaskill

4 4

How to import a boost::python dll in windows?
by ichijoji Aug. 5, 2011

Aug. 5, 2011

I'm trying to port some research code that uses boost::python to expose a library to python to windows, but I'm having trouble importing the dll into python. I'm compiling using msvc 2005 and using python 2.5, but when I try to import the module I get this: Traceback (most recent call last): File "main.py", line 1, in <module> import object File "c:\code\sge\code\scripts\object.py", line 1, in <module> import sge ImportError: No module named sge My module is named sge and I'm compiling to sge.dll. Is there some obvious reason why python wouldn't be able to find my dll? When I compile on linux into an so this code works fine. -- View this message in context: http://www.nabble.com/How-to-import-a-boost%3A%3Apython-dll-in-windows--tf3… Sent from the Python - c++-sig mailing list archive at Nabble.com.

4 4

Miscellaneous Boost.Python Utilities
by Jim Bosch July 6, 2011

July 6, 2011

In the hope that others might find them useful, and perhaps contribute some of their own, I've posted a collection of miscellaneous Boost.Python extensions I've been using at the Boost sandbox: http://svn.boost.org/svn/boost/sandbox/python_extensions Features include: - Conversions between STL containers and Boost.Range iterator ranges and Python builtins like list, tuple, and dict. - Conversions between Boost.Fusion sequences and Python tuples. - A third solution to the const shared_ptr problem (see http://language-binding.net/pyplusplus/troubleshooting_guide/shared_ptr/sha…) that isn't evil (I don't think) and doesn't involve changing the Boost.Python library itself - it simply doesn't use register_ptr_to_python to register the conversion. More info is available in the README file. Also, I'm sure many of the regulars on this list have their own similar extensions, and I'd love to see them collected in one place. If you'd like to add your collection to mine, or have a suggestion for some other place I should put my collection, please let me know. I would like to limit this collection to simple things that don't depend on non-Boost libraries, however. Jim Bosch

2 1

Boost Python - Implementing a Cloning function
by Jay Riley June 30, 2011

June 30, 2011

I'm trying to implement a Cloning function for one of my classes I want to extend to Python. Extending the classes in C++ is easy as I can just override the Clone function, but it's definitely not working like that for Python. Here's the code, with unimportant detail ommitted. template<class T> class Cloneable { public: typedef boost::shared_ptr<T> ClonePtr; virtual ClonePtr Clone() = 0; }; class Action : public Cloneable<Action> { public: virtual ClonePtr Clone() override; } Action::ClonePtr Action::Clone() { return ClonePtr(new Action(*this)); } class Attack : public Action { public: virtual ClonePtr Clone() override; } Attack::ClonePtr Attack::Clone() { return Attack::ClonePtr(new Attack(*this)); } struct AttackWrapper : Game::Battles::Actions::Attack { Cloneable<Action>::ClonePtr AttackWrapper::Clone() { return call_method<Cloneable<Action>::ClonePtr>(self, "Clone"); } Cloneable<Action>::ClonePtr AttackWrapper::CloneDefault() { return this->Action::Clone(); } } I expose it like follows: class_<Attack, boost::shared_ptr<Attack>, std::auto_ptr<AttackWrapper>, bases<Action> >("Attack") .def(init<>()) .def(init<Attack>()) .def("Clone", &Attack::Clone, &AttackWrapper::CloneDefault) ; In my python file: class ScriptedAttack(Attack): def __init__(self, Type, ID, Name, Flags, Power, MPCost = 0, SPCost = 0, Accuracy = 0.9, CritChance = 0.1, DefineOwnUse = False, EleWeights = None, StatusEffectChances = None): #initialization logic def Clone(self): #return ScriptedAttack(self) #what to put here? Fire = ScriptedAttack(ActionType.MagicAction, PrimaryEngine.GetUID(), "Fire", AttackFlags.Projectile | AttackFlags.Elemental, 32, 14, 0, 1.0, 0.1, False, {Elements.Fire: 1.0}) Fire2 = Fire.Clone() ActLibrary.AddAttack(Fire) ActLibrary.AddAttack(Fire2) I'm really not sure how to do this - I'm stuck on what I need to put under def Clone. I know I can't have multiple inits, and I can't define a copy constructor. I know about the copy function in python, but the Action class (base of Attack) has a custom copy constructor I need to be called. Can someone help me out with how to do this? Thanks in advance

1 0

boost python extensions & <dll-path> on HPUX/AIX ?
by Avi Bahra June 30, 2011

June 30, 2011

I have built boost python extension. I have used the <dll-path> to embed the path to boost python shared library. This avoids users of my extension from having to set LD_LIBRARY_PATH when using my extension python-extension ecflow : [ glob src/*.cpp ] .... : <dll-path>$(PYTHON_INSTALL_DIR) ; In my Jamroot.jam: install install-py : Pyext//ecflow : <install-dependencies>on <install-type>PYTHON_EXTENSION <install-type>SHARED_LIB <dll-path>$(PYTHON_INSTALL_DIR) <location>$(PYTHON_INSTALL_DIR) ; This all works like a charm on Linux: However on HPUX, I find that embedded path, is always the development path and not $(PYTHON_INSTALL_DIR) On AIX it seems to be ignored. Does any one know if <dll-path> feature is known to work on HPUX/AIX ? Best regards, Ta, Avi

1 0

Wrapper for bytes type?
by Andreas Kloeckner June 26, 2011

June 26, 2011

Hi there, Since boost.python provides a wrapper for str, it should likely also provide bytes if it's on Python version 3 and newer. Andreas

3 2

Using boost::tuple from python
by Jay Riley June 25, 2011

June 25, 2011

I've been trying to figure out how to expose a property in my class that is a boost::tuple. The tuple is defined as follows: typedef boost::shared_ptr<Action> action_ptr; typedef boost::tuple<BattleCharacter*, action_ptr > ActionTargetTuple; It's contained with a class defined as follows: class Action : public Cloneable<Action> { public: //Irrelevant Code Omitted std::vector<ActionTargetTuple> Targets; } I've seen numerous articles while I was searching about how to convert a boost::tuple into a python tuple, but that's not what I'm looking to do. I want to be able to access the tuple as it exists on the Action class. (I know how to do the vector part). The action class is exposed as follows: class_<Action>("Action") .def("Targets", &Action::Targets) ; I figured I might be able to expose the tuple by some variation on the below: class_<ActionTargetTuple>("ActionTargetTuple") .def("get", &ActionTargetTuple::get<int>, return_value_policy<reference_existing_object>()) ; then use get from python, but if it is doable in this way, I'm not sure what the set up needs to be. Does anyone know how to do this/could suggest an alternative? Thanks

2 1

about compiling Boost.Python code in MSVC 10 and python 3.1
by EVA LIN June 25, 2011

June 25, 2011

Hi all, I am new to Boost.Python. Following the instruction in the help, I try to compile the quickstart example but there are lots of error I am using MSVC++ 2010, python 3.1 and Boost.Python 1.46.1 As stated in the help, I first install the boost.build and set the user-config.jam so the path of my python are visible to the builder using python : 3.1 : D:/Applications/Python : D:/Applications/Python/include : D:/Applications/Python/libs ; Then, by running the command bjam toolset=msvc --verbose-test test Some issues are pop out D:\Programs\BOOSTS\BoostPython\libs\python\example\MyProject\GetStatistics>bjam toolset=msvc --verbose-test test ...patience... ...patience... ...found 1572 targets... ...updating 21 targets... common.mkdir bin\test_ext.test common.mkdir bin\test_ext.test\msvc-10.0 common.mkdir bin\test_ext.test\msvc-10.0\debug common.mkdir bin\test_ext.test\msvc-10.0\debug\threading-multi copy test_extending.py Invalid Command copy /b + this-file-does-not-exist-A698EE7806899E69 "test_extending.py" "bi n\test_ext.test\msvc-10.0\debug\threading-multi\test_extending.py" ...failed copy test_extending.py bin\test_ext.test\msvc-10.0\debug\threading-mul ti\test_extending.py... ...removing test_extending.py function.obj : error LNK2019: unresolved external symbol __imp__PyObject_SetAttr referenced in function "public: static void __cdecl boost::python::objects::fun ction::add_to_namespace(class boost::python::api::object const &,char const *,cl ass boost::python::api::object const &,char const *)" (?add_to_namespace@functio n@objects@python@boost@@SAXABVobject@api@34@PBD01@Z) object_protocol.obj : error LNK2001: unresolved external symbol __imp__PyObject_ SetAttr function.obj : error LNK2001: unresolved external symbol __imp__PyStaticMethod_T ype function.obj : error LNK2019: unresolved external symbol __imp__PyObject_GetItem referenced in function "public: static void __cdecl boost::python::objects::fun ction::add_to_namespace(class boost::python::api::object const &,char const *,cl ass boost::python::api::object const &,char const *)" (?add_to_namespace@functio n@objects@python@boost@@SAXABVobject@api@34@PBD01@Z) object_protocol.obj : error LNK2001: unresolved external symbol __imp__PyObject_ GetItem function.obj : error LNK2019: unresolved external symbol __imp__PyMethod_New ref erenced in function _function_descr_get function.obj : error LNK2019: unresolved external symbol __imp__PyUnicode_Intern FromString referenced in function _function_get_name function.obj : error LNK2001: unresolved external symbol __imp__PyCFunction_Type life_support.obj : error LNK2019: unresolved external symbol __imp__PyWeakref_Ne wRef referenced in function "struct _object * __cdecl boost::python::objects::ma ke_nurse_and_patient(struct _object *,struct _object *)" (?make_nurse_and_patien t@objects@python@boost@@YAPAU_object@@PAU4@0@Z) life_support.obj : error LNK2019: unresolved external symbol __imp___PyObject_Ne w referenced in function "struct _object * __cdecl boost::python::objects::make_ nurse_and_patient(struct _object *,struct _object *)" (?make_nurse_and_patient@o bjects@python@boost@@YAPAU_object@@PAU4@0@Z) errors.obj : error LNK2001: unresolved external symbol __imp__PyExc_ValueError errors.obj : error LNK2001: unresolved external symbol __imp__PyExc_IndexError errors.obj : error LNK2001: unresolved external symbol __imp__PyExc_OverflowErro r errors.obj : error LNK2019: unresolved external symbol __imp__PyErr_NoMemory ref erenced in function __catch$?handle_exception_impl@python@boost@ @YA_NV?$function 0@X@2@@Z$0 module.obj : error LNK2019: unresolved external symbol __imp__PyModule_Create2 r eferenced in function "struct _object * __cdecl boost::python::detail::init_modu le(struct PyModuleDef &,void (__cdecl*)(void))" (?init_module@detail @python@boos t@@YAPAU_object@@AAUPyModuleDef@@P6AXXZ@Z) builtin_converters.obj : error LNK2019: unresolved external symbol __imp___PyUni code_AsString referenced in function "void * __cdecl boost::python::converter::` anonymous namespace'::convert_to_cstring(struct _object *)" (?convert_to_cstring @?A0x05677deb@converter@python@boost@@YAPAXPAU_object@@@Z) builtin_converters.obj : error LNK2019: unresolved external symbol __imp__PyUnic odeUCS2_FromEncodedObject referenced in function _encode_string_unaryfunc builtin_converters.obj : error LNK2001: unresolved external symbol __imp__PyBool _Type builtin_converters.obj : error LNK2001: unresolved external symbol __imp__PyFloa t_Type builtin_converters.obj : error LNK2001: unresolved external symbol __imp__PyComp lex_Type builtin_converters.obj : error LNK2019: unresolved external symbol __imp__PyLong _AsLongLong referenced in function "public: static __int64 __cdecl boost::python ::converter::`anonymous namespace'::long_long_rvalue_from_python::extract(struct _object *)" (?extract@long_long_rvalue_from_python@?A0x05677deb@converter @pytho n@boost@@SA_JPAU_object@@@Z) builtin_converters.obj : error LNK2019: unresolved external symbol __imp__PyLong _AsUnsignedLongLong referenced in function "public: static unsigned __int64 __cd ecl boost::python::converter::`anonymous namespace'::unsigned_long_long_rvalue_f rom_python::extract(struct _object *)" (?extract@unsigned_long_long_rvalue_from_ python@?A0x05677deb@converter@python@boost@@SA_KPAU_object@@@Z) builtin_converters.obj : error LNK2019: unresolved external symbol __imp__PyComp lex_RealAsDouble referenced in function "public: static class std::complex<doubl e> __cdecl boost::python::converter::`anonymous namespace'::complex_rvalue_from_ python::extract(struct _object *)" (?extract@complex_rvalue_from_python @?A0x0567 7deb@converter@python@boost@@SA?AV?$complex@N@std@@PAU_object@@@Z) builtin_converters.obj : error LNK2019: unresolved external symbol __imp__PyComp lex_ImagAsDouble referenced in function "public: static class std::complex<doubl e> __cdecl boost::python::converter::`anonymous namespace'::complex_rvalue_from_ python::extract(struct _object *)" (?extract@complex_rvalue_from_python @?A0x0567 7deb@converter@python@boost@@SA?AV?$complex@N@std@@PAU_object@@@Z) builtin_converters.obj : error LNK2019: unresolved external symbol __imp__PyUnic odeUCS2_AsWideChar referenced in function "public: static class std::basic_strin g<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> > __cde cl boost::python::converter::`anonymous namespace'::wstring_rvalue_from_python:: extract(struct _object *)" (?extract@wstring_rvalue_from_python @?A0x05677deb@con verter@python@boost@@SA?AV?$basic_string@_WU?$char_traits@_W@std @@V?$allocator@_ W@2@@std@@PAU_object@@@Z) builtin_converters.obj : error LNK2019: unresolved external symbol __imp__PyByte s_AsString referenced in function "public: static class std::basic_string<char,s truct std::char_traits<char>,class std::allocator<char> > __cdecl boost::python: :converter::`anonymous namespace'::string_rvalue_from_python::extract(struct _ob ject *)" (?extract@string_rvalue_from_python@?A0x05677deb@converter @python@boost @@SA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@ @PAU_object@@ @Z) builtin_converters.obj : error LNK2019: unresolved external symbol __imp__PyByte s_Size referenced in function "public: static class std::basic_string<char,struc t std::char_traits<char>,class std::allocator<char> > __cdecl boost::python::con verter::`anonymous namespace'::string_rvalue_from_python::extract(struct _object *)" (?extract@string_rvalue_from_python@?A0x05677deb@converter@python@boost @@SA ?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@PAU_object@ @@Z) builtin_converters.obj : error LNK2019: unresolved external symbol __imp__PyLong _AsUnsignedLong referenced in function "public: static unsigned char __cdecl boo st::python::converter::`anonymous namespace'::unsigned_int_rvalue_from_python<un signed char>::extract(struct _object *)" (?extract@ ?$unsigned_int_rvalue_from_py thon@E@?A0x05677deb@converter@python@boost@@SAEPAU_object@@@Z) builtin_converters.obj : error LNK2019: unresolved external symbol __imp__PyUnic odeUCS2_AsUTF8String referenced in function "void __cdecl boost::python::convert er::`anonymous namespace'::`dynamic initializer for 'py_unicode_as_string_unaryf unc''(void)" (??__Epy_unicode_as_string_unaryfunc@?A0x05677deb@converter @python@ boost@@YAXXZ) iterator.obj : error LNK2001: unresolved external symbol __imp__PyExc_StopIterat ion stl_iterator.obj : error LNK2019: unresolved external symbol __imp__PyIter_Next referenced in function "public: void __thiscall boost::python::objects::stl_inpu t_iterator_impl::increment(void)" (?increment@stl_input_iterator_impl @objects@py thon@boost@@QAEXXZ) object_protocol.obj : error LNK2019: unresolved external symbol __imp__PyObject_ GetAttr referenced in function "class boost::python::api::object __cdecl boost:: python::api::getattr(class boost::python::api::object const &,class boost::pytho n::api::object const &)" (?getattr@api@python@boost@@YA?AVobject@123 @ABV4123@0@Z ) object_protocol.obj : error LNK2019: unresolved external symbol __imp__PyErr_Exc eptionMatches referenced in function "class boost::python::api::object __cdecl b oost::python::api::getattr(class boost::python::api::object const &,class boost: :python::api::object const &,class boost::python::api::object const &)" (?getatt r@api@python@boost@@YA?AVobject@123@ABV4123@00@Z) object_protocol.obj : error LNK2019: unresolved external symbol __imp__PyObject_ SetItem referenced in function "void __cdecl boost::python::api::setitem(class b oost::python::api::object const &,class boost::python::api::object const &,class boost::python::api::object const &)" (?setitem@api@python@boost @@YAXABVobject@1 23@00@Z) object_protocol.obj : error LNK2019: unresolved external symbol __imp__PyObject_ DelItem referenced in function "void __cdecl boost::python::api::delitem(class b oost::python::api::object const &,class boost::python::api::object const &)" (?d elitem@api@python@boost@@YAXABVobject@123@0@Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyObject _RichCompare referenced in function "class boost::python::api::object __cdecl bo ost::python::api::operator>(class boost::python::api::object const &,class boost ::python::api::object const &)" (??Oapi@python@boost@@YA?AVobject@012 @ABV3012@0@ Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyNumber _Add referenced in function "class boost::python::api::object __cdecl boost::pyt hon::api::operator+(class boost::python::api::object const &,class boost::python ::api::object const &)" (??Hapi@python@boost@@YA?AVobject@012@ABV3012@0@Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyNumber _Subtract referenced in function "class boost::python::api::object __cdecl boost ::python::api::operator-(class boost::python::api::object const &,class boost::p ython::api::object const &)" (??Gapi@python@boost@@YA?AVobject@012@ABV3012@0 @Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyNumber _Multiply referenced in function "class boost::python::api::object __cdecl boost ::python::api::operator*(class boost::python::api::object const &,class boost::p ython::api::object const &)" (??Dapi@python@boost@@YA?AVobject@012@ABV3012@0 @Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyNumber _FloorDivide referenced in function "class boost::python::api::object __cdecl bo ost::python::api::operator/(class boost::python::api::object const &,class boost ::python::api::object const &)" (??Kapi@python@boost@@YA?AVobject@012 @ABV3012@0@ Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyNumber _Remainder referenced in function "class boost::python::api::object __cdecl boos t::python::api::operator%(class boost::python::api::object const &,class boost:: python::api::object const &)" (??Lapi@python@boost@@YA?AVobject@012 @ABV3012@0@Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyNumber _Lshift referenced in function "class boost::python::api::object __cdecl boost:: python::api::operator<<(class boost::python::api::object const &,class boost::py thon::api::object const &)" (??6api@python@boost@@YA?AVobject@012@ABV3012@0 @Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyNumber _Rshift referenced in function "class boost::python::api::object __cdecl boost:: python::api::operator>>(class boost::python::api::object const &,class boost::py thon::api::object const &)" (??5api@python@boost@@YA?AVobject@012@ABV3012@0 @Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyNumber _And referenced in function "class boost::python::api::object __cdecl boost::pyt hon::api::operator&(class boost::python::api::object const &,class boost::python ::api::object const &)" (??Iapi@python@boost@@YA?AVobject@012@ABV3012@0@Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyNumber _Xor referenced in function "class boost::python::api::object __cdecl boost::pyt hon::api::operator^(class boost::python::api::object const &,class boost::python ::api::object const &)" (??Tapi@python@boost@@YA?AVobject@012@ABV3012@0@Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyNumber _Or referenced in function "class boost::python::api::object __cdecl boost::pyth on::api::operator|(class boost::python::api::object const &,class boost::python: :api::object const &)" (??Uapi@python@boost@@YA?AVobject@012@ABV3012@0@Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyNumber _InPlaceAdd referenced in function "class boost::python::api::object & __cdecl b oost::python::api::operator+=(class boost::python::api::object &,class boost::py thon::api::object const &)" (??Yapi@python@boost@@YAAAVobject@012 @AAV3012@ABV301 2@@Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyNumber _InPlaceSubtract referenced in function "class boost::python::api::object & __cd ecl boost::python::api::operator-=(class boost::python::api::object &,class boos t::python::api::object const &)" (??Zapi@python@boost@@YAAAVobject@012 @AAV3012@A BV3012@@Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyNumber _InPlaceMultiply referenced in function "class boost::python::api::object & __cd ecl boost::python::api::operator*=(class boost::python::api::object &,class boos t::python::api::object const &)" (??Xapi@python@boost@@YAAAVobject@012 @AAV3012@A BV3012@@Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyNumber _InPlaceFloorDivide referenced in function "class boost::python::api::object & _ _cdecl boost::python::api::operator/=(class boost::python::api::object &,class b oost::python::api::object const &)" (??_0api@python@boost@@YAAAVobject@012 @AAV30 12@ABV3012@@Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyNumber _InPlaceRemainder referenced in function "class boost::python::api::object & __c decl boost::python::api::operator%=(class boost::python::api::object &,class boo st::python::api::object const &)" (??_1api@python@boost@@YAAAVobject@012 @AAV3012 @ABV3012@@Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyNumber _InPlaceLshift referenced in function "class boost::python::api::object & __cdec l boost::python::api::operator<<=(class boost::python::api::object &,class boost ::python::api::object const &)" (??_3api@python@boost@@YAAAVobject@012 @AAV3012@A BV3012@@Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyNumber _InPlaceRshift referenced in function "class boost::python::api::object & __cdec l boost::python::api::operator>>=(class boost::python::api::object &,class boost ::python::api::object const &)" (??_2api@python@boost@@YAAAVobject@012 @AAV3012@A BV3012@@Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyNumber _InPlaceAnd referenced in function "class boost::python::api::object & __cdecl b oost::python::api::operator&=(class boost::python::api::object &,class boost::py thon::api::object const &)" (??_4api@python@boost@@YAAAVobject@012 @AAV3012@ABV30 12@@Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyNumber _InPlaceXor referenced in function "class boost::python::api::object & __cdecl b oost::python::api::operator^=(class boost::python::api::object &,class boost::py thon::api::object const &)" (??_6api@python@boost@@YAAAVobject@012 @AAV3012@ABV30 12@@Z) object_operators.obj : error LNK2019: unresolved external symbol __imp__PyNumber _InPlaceOr referenced in function "class boost::python::api::object & __cdecl bo ost::python::api::operator|=(class boost::python::api::object &,class boost::pyt hon::api::object const &)" (??_5api@python@boost@@YAAAVobject@012 @AAV3012@ABV301 2@@Z) wrapper.obj : error LNK2019: unresolved external symbol __imp__PyDict_GetItemStr ing referenced in function "protected: class boost::python::override __thiscall boost::python::detail::wrapper_base::get_override(char const *,struct _typeobjec t *)const " (?get_override@wrapper_base@detail@python@boost@ @IBE?AVoverride@34@P BDPAU_typeobject@@@Z) wrapper.obj : error LNK2001: unresolved external symbol __imp__PyMethod_Type import.obj : error LNK2019: unresolved external symbol __imp__PyImport_ImportMod ule referenced in function "class boost::python::api::object __cdecl boost::pyth on::import(class boost::python::str)" (?import@python@boost@@YA?AVobject@api @12@ Vstr@12@@Z) exec.obj : error LNK2019: unresolved external symbol __imp__PyRun_StringFlags re ferenced in function "class boost::python::api::object __cdecl boost::python::ev al(class boost::python::str,class boost::python::api::object,class boost::python ::api::object)" (?eval@python@boost@@YA?AVobject@api@12@Vstr@12@V3412@1@Z) exec.obj : error LNK2019: unresolved external symbol __imp__PyEval_GetGlobals re ferenced in function "class boost::python::api::object __cdecl boost::python::ev al(class boost::python::str,class boost::python::api::object,class boost::python ::api::object)" (?eval@python@boost@@YA?AVobject@api@12@Vstr@12@V3412@1@Z) exec.obj : error LNK2019: unresolved external symbol __imp__PyRun_FileExFlags re ferenced in function "class boost::python::api::object __cdecl boost::python::ex ec_file(class boost::python::str,class boost::python::api::object,class boost::p ython::api::object)" (?exec_file@python@boost@@YA?AVobject@api@12@Vstr @12@V3412@ 1@Z) D:\Programs\BOOSTS\BoostPython\bin.v2\libs\python\build\msvc-10.0\debug\threadin g-multi\boost_python-vc100-mt-gd-1_46_1.dll : fatal error LNK1120: 130 unresolve d externals call "d:\Applications\MSVC\VC\vcvarsall.bat" x86 >nul link /NOLOGO /INCREMENTAL:NO /DLL /DEBUG /MACHINE:X86 /subsystem:console /out:"D :\Programs\BOOSTS\BoostPython\bin.v2\libs\python\build\msvc-10.0\debug\threading -multi\boost_python-vc100-mt-gd-1_46_1.dll" /IMPLIB:"D:\Programs\BOOSTS\BoostPyt hon\bin.v2\libs\python\build\msvc-10.0\debug\threading-multi\boost_python-vc100- mt-gd-1_46_1.lib" /LIBPATH:"D:\Applications\Python\libs" @"D:\Programs\BOOSTS\ BoostPython\bin.v2\libs\python\build\msvc-10.0\debug\threading-multi\boost_pytho n-vc100-mt-gd-1_46_1.dll.rsp" if %ERRORLEVEL% NEQ 0 EXIT %ERRORLEVEL% ...failed msvc.link.dll D:\Programs\BOOSTS\BoostPython\bin.v2\libs\python\build\ msvc-10.0\debug\threading-multi\boost_python-vc100-mt-gd-1_46_1.dll D:\Programs\ BOOSTS\BoostPython\bin.v2\libs\python\build\msvc-10.0\debug\threading-multi\boos t_python-vc100-mt-gd-1_46_1.lib D:\Programs\BOOSTS\BoostPython\bin.v2\libs\pytho n\build\msvc-10.0\debug\threading-multi\boost_python-vc100-mt-gd-1_46_1.pdb... ...removing D:\Programs\BOOSTS\BoostPython\bin.v2\libs\python\build\msvc-10.0\de bug\threading-multi\boost_python-vc100-mt-gd-1_46_1.lib ...removing D:\Programs\BOOSTS\BoostPython\bin.v2\libs\python\build\msvc-10.0\de bug\threading-multi\boost_python-vc100-mt-gd-1_46_1.pdb ...skipped <pbin\msvc-10.0\debug\threading-multi>extending.pyd for lack of <pD:\ Programs\BOOSTS\BoostPython\bin.v2\libs\python\build\msvc-10.0\debug\threading-m ulti>boost_python-vc100-mt-gd-1_46_1.lib... ...skipped <pbin\msvc-10.0\debug\threading-multi>extending.lib for lack of <pD:\ Programs\BOOSTS\BoostPython\bin.v2\libs\python\build\msvc-10.0\debug\threading-m ulti>boost_python-vc100-mt-gd-1_46_1.lib... ...skipped <pbin\msvc-10.0\debug\threading-multi>extending.pdb for lack of <pD:\ Programs\BOOSTS\BoostPython\bin.v2\libs\python\build\msvc-10.0\debug\threading-m ulti>boost_python-vc100-mt-gd-1_46_1.lib... ...skipped <pbin\test_ext.test\msvc-10.0\debug\threading-multi>test_ext for lack of <pbin\test_ext.test\msvc-10.0\debug\threading-multi>test_extending.py... common.mkdir bin\test_embed.test common.mkdir bin\test_embed.test\msvc-10.0 common.mkdir bin\test_embed.test\msvc-10.0\debug common.mkdir bin\test_embed.test\msvc-10.0\debug\threading-multi ...skipped <pbin\test_embed.test\msvc-10.0\debug\threading-multi>test_embed.exe for lack of <pD:\Programs\BOOSTS\BoostPython\bin.v2\libs\python\build\msvc-10.0\ debug\threading-multi>boost_python-vc100-mt-gd-1_46_1.lib... ...skipped <pbin\test_embed.test\msvc-10.0\debug\threading-multi>test_embed.pdb for lack of <pD:\Programs\BOOSTS\BoostPython\bin.v2\libs\python\build\msvc-10.0\ debug\threading-multi>boost_python-vc100-mt-gd-1_46_1.lib... ...skipped <pbin\test_embed.test\msvc-10.0\debug\threading-multi>test_embed.run for lack of <pbin\test_embed.test\msvc-10.0\debug\threading-multi>test_embed.exe ... ...failed updating 4 targets... ...skipped 9 targets... ...updated 8 targets...

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Clearing lists in boost-python
by charles75 June 22, 2011

June 22, 2011

Hi, I've been trying to clear a list of dictionaries from a list without success. The code below is a simple example of what I'm trying to achieve. dict a, b; list mylist; mylist.append(a); mylist.append(b); mylist.clear(); When I type in the last statement I get the error below from the linker ‘class boost::python::list’ has no member named ‘clear’. Is there another way of clearing the list? Thanks in advance for any help. -- View this message in context: http://boost.2283326.n4.nabble.com/Clearing-lists-in-boost-python-tp3617273… Sent from the Python - c++-sig mailing list archive at Nabble.com.

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