[C++-sig] Type converter not found for property

[Alex Leach]

On Thu, 09 May 2013 07:55:07 +0100, Wichert Akkerman <wichert at wiggy.net>  
wrote:

>
> On May 8, 2013, at 23:31 , "Alex Leach" <beamesleach at gmail.com> wrote:
>
>> That error means the type_id of uuid is not in the bp registry.
>>
>> I think you can fix this by deriving uuid_to_python from  
>> >>to_python_converter, as demonstrated in the pytype_function  
>> example[1]. >>This will add the get_pytype function call, and on  
>> initialisation, should >>hopefully add what's missing: a call to  
>> `registry::lookup`[2].
>
> I'm afraid that doesn't work. To test this I changes my converter struct  
> to derive from >bp::converter::wrap_pyttype<&PyStringType> and pass  
> has_get_type=true to the to_python_converter call, but I still >get the  
> exact same error.

Fair enough. I see your conversion function doesn't use bp::object, but a  
raw PyObject instead.  Using a bp::object might do the registration for  
you.. Probably not. Alternatively, you could try adding this to your  
registration code:-


converter::registration& uuid_converter
    = const_cast<converter::registration&>(
        converter::registry::lookup(type_id<boost::uuids::uuid>()) );

uuid_converter.m_class_object =
# if PY_VERSION_HEX >= 0x03000000
     &PyUnicode_Type;
#else
     &PyString_Type;
#endif


That will get you past the current error, at least, but there's probably  
an easier solution...


HTH,
Alex
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/cplusplus-sig/attachments/20130509/b3bcbb49/attachment.html>