Roman Yakovenko wrote: > 2009/1/17 Paul Melis <pyplusp...@assumetheposition.nl>: > >> But when trying to run >> >> import doh >> >> class MyCallback(doh.Callback): >> def execute(self, t): >> print t >> return 1 >> >> m = MyCallback() >> >> t = doh.Thing() >> t.setCallback(m) >> t.update() >> >> i'm getting >> >> Traceback (most recent call last): >> File "no_to_python_converter.py", line 12, in <module> >> t.update() >> TypeError: No to_python (by-value) converter found for C++ type: Thing". >> >> And I fail to see why... >> > > Mu guess: you need to use boost::python::register_ptr_to_python< Thin >(); > ( > http://www.boost.org/doc/libs/1_37_0/libs/python/doc/v2/register_ptr_to_python.html > ) > Well, that only seems to work on smart pointers, i.e. ref_ptr<Thing>. >From the docs: "|<boost/python/register_ptr_to_python.hpp>| supplies |register_ptr_to_python|, a function template which registers a conversion for smart pointers to Python" > I have more or less complete example, which exports custom pointer > class and its usage to Python: > http://www.language-binding.net/pyplusplus/troubleshooting_guide/smart_ptrs/smart_ptrs.html > Right, I did find it while trying to solve the above. But where our code differs is that my wrapper class (CallbackWrap) needs to pass a Thing* to Python and that's where it goes wrong. Your wrapper only returns an integer and doesn't pass any parameters to Python. I think that is the crucial difference here.
Regards, Paul _______________________________________________ Cplusplus-sig mailing list Cplusplus-sig@python.org http://mail.python.org/mailman/listinfo/cplusplus-sig
