Hello,
I'm having trouble trying to override a method on a class exposed to
Python. I cannot modify the original class, so I need to wrap it to
change the behaviour of some methods to be Python compatible. The
classes look like the following:
struct DocumentWrap : Document, wrapper<Document>
{
DocumentWrap() : Document(){ };
DocumentWrap(const Document&) { };
wstring toString()
{
wstring w(_T("test"));
return w;
}
int test(){
return 1;
}
};
class_<Hits>("Hits", init<int>())
.def("doc", &Hits::doc, return_internal_reference<>());
class_<DocumentWrap>("Document")
.def("toString", &DocumentWrap::toString)
.def("test", &DocumentWrap::test)
;
Hits::doc returns a Document. If I do:
>>> d = Document()
>>> d.test()
1
>>> d.toString()
"test"
I get the right answer. However, If I obtain the class through Hits I
get a reference to a c++ object of type Document (not DocumentWrap) so
trying to execute the methods yield:
Traceback (most recent call last):
File "t.py", line 10, in <module>
d.test()
Boost.Python.ArgumentError: Python argument types in
Document.test(Document)
did not match C++ signature:
test(DocumentWrap {lvalue})
Traceback (most recent call last):
File "t.py", line 10, in <module>
d.toString()
Boost.Python.ArgumentError: Python argument types in
Document.toString(Document)
did not match C++ signature:
toString(DocumentWrap {lvalue})
Is there any way to get python to understand the internal reference to
Document can be treated as a DocumentWrap?
Thanks in advance!
Best Regards,
--
Nicolas Lara
Linux user #380134
http://nicolas-lara.blogspot.com/
Public key id: 0x152e7713 at http://subkeys.pgp.net/
_______________________________________________
Cplusplus-sig mailing list
Cplusplus-sig@python.org
http://mail.python.org/mailman/listinfo/cplusplus-sig
