Boost::Python: Converting to and from custom class pointers

Boost::Python series List Dictionary Pointer conversion Site: boost.org (Documentation) [edit]

NOTE: Sadly this code isn't working 100% correctly, I have a new versions which I will add here soon

Code: Converting your custom class to a python usable class

1. CustomString* factory(const char* str){
2.     return new CustomString(str);
3. }
4.  
5. struct CustomString_to_PyStr: to_python_converter<CustomString*, CustomString_to_PyStr> {
6.     static PyObject* convert(CustomString* x) {
7.         return PyString_FromString(x->c_str());
8.     }
9. };
10.  
11. void* extract_CustomString(PyObject* op){
12.     return CustomString::stringWithCString(PyString_AsString(op));
13. }
14.  
15. BOOST_PYTHON_MODULE(Foo){
16.     CustomString_to_PyStr();
17.     boost::python::converter::registry::insert(&extract_CustomString, boost::python::type_id<CustomString>());
18. }

With this code we can convert to and from a custom string class. In python we use the regular strings and in C++ we can use our custom string class. This would work with any class of course.