I suggest (a) renaming as test.test is confusing, eg call the file/module test_file, and the class test_class (b) I think from your previous post that test.test() simply calls the constructor for class test, and this constructor is defined in python, returning an object not a pointer, so perhaps try extract<Component> not extract<Component*>
Best Lewis Bayforest Technologies Limited 48 Dover St, Mayfair London W1S 4FF work1: +44 203 968 5167 email: lewis.ev...@bayforest.ai web: https://bayforest.ai/ On Thu, May 14, 2020 at 5:00 PM <cplusplus-sig-requ...@python.org> wrote: > Send Cplusplus-sig mailing list submissions to > cplusplus-sig@python.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://mail.python.org/mailman/listinfo/cplusplus-sig > or, via email, send a message with subject or body 'help' to > cplusplus-sig-requ...@python.org > > You can reach the person managing the list at > cplusplus-sig-ow...@python.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Cplusplus-sig digest..." > > > Today's Topics: > > 1. Re: Cplusplus-sig Digest, Vol 125, Issue 3 (Carlos Duran) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 13 May 2020 17:50:16 +0200 > From: Carlos Duran <carlos_w...@zohomail.eu> > To: "cplusplus-sig" <cplusplus-sig@python.org> > Subject: Re: [C++-sig] Cplusplus-sig Digest, Vol 125, Issue 3 > Message-ID: > <1720ebab660.12aad1dbc94224.6884088036261319...@zohomail.eu> > Content-Type: text/plain; charset="utf-8" > > Hello again, > > > > I rewrite part of the code, but I didn't find my error. > > My new code is: > > cat ../src/DemiWu.cpp > > #include <boost/python.hpp> > > > > #include <DemiComponent.hpp> > > #include <DemiWu.hpp> > > #include <iostream> > > #include <string> > > > > using namespace boost::python; > > using namespace DemiWu; > > > > #if PY_MAJOR_VERSION >= 3 > > #?? define INIT_MODULE PyInit_DemiWu > > ??? extern "C" PyObject* INIT_MODULE(); > > #else > > #?? define INIT_MODULE initDemiwu > > ??? extern "C" void INIT_MODULE(); > > #endif > > > > int main() > > { > > ????? PyImport_AppendInittab((char*)"DemiWu", INIT_MODULE); > > ????? Py_Initialize(); > > ????? object main = import("__main__"); > > ????? object global = main.attr("__dict__"); > > ????? PySys_SetPath(L"."); > > ????? global["test"] = import("test"); // How can I check the import? > > > > ????? object funcObj = global["test"].attr("test"); > > ????? std::cout << std::boolalpha; > > ????? std::cout << funcObj.is_none() << "\n"; // funcObj.is_none() == false > > ????? object resultObj = funcObj(); > > ????? std::cout << resultObj.is_none() << "\n"; // resultObj.is_none() == > false > > > > ????? // I suppose that in "real" code I need to check every time I use > attr method. > > ????? extract<std::string> > exclass(funcObj.attr("__class__").attr("__name__")); > > ????? if(exclass.check()) > > ????? ????? std::cout << "test.test.__class__.__name__: " << exclass() << > "\n"; // exclass() == "class" > > ????? extract<std::string> > exclass2(resultObj.attr("__class__").attr("__name__")); > > ????? if(exclass2.check()) > > ????? ????? std::cout << "test.test().__class__.__name__: " << exclass2() > << "\n"; // exclass2() == "test" > > ????? extract<std::string> > exbase(funcObj.attr("__base__").attr("__name__")); > > ????? if(exbase.check()) > > ????? ????? std::cout << "test.test.__base__.__name__: " << exbase() << > "\n"; // exbase() == "Component" > > ????? // It seems that resultObj is correct, I think that I am using > extract<> function wrong. > > ????? extract<Component*> ex(resultObj); > > ????? if(ex.check()){ > > ????? ????? Component * const b=ex(); > > ????? ????? b->on_create(); ? > > ????? ????? std::cout << "SUCCESS\n"; > > ????? ????? return 0; > > ????? } else { > > ????? ????? std::cout << "FAIL\n"; // And again the program jumps here. > > ????? ????? return 1; > > ????? } > > } > > > > And the execution: > > ./DemiWu > > false > > false > > test.test.__class__.__name__: class > > test.test().__class__.__name__: test > > test.test.__base__.__name__: Component > > FAIL > > > > Thank you for your response > > > > Carlos > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://mail.python.org/pipermail/cplusplus-sig/attachments/20200513/e8d19d13/attachment-0001.html > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > Cplusplus-sig mailing list > Cplusplus-sig@python.org > https://mail.python.org/mailman/listinfo/cplusplus-sig > > > ------------------------------ > > End of Cplusplus-sig Digest, Vol 125, Issue 5 > ********************************************* > -- Bayforest Capital Limited ( Bayforest®) is an Appointed Representative of G10 Capital Limited. 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