python-list to c++-vector

Mmmm ... if you really want to only have list, you may use
boost::python::list as argument : simpler, clearer and boost.python does
the verification job for you !


But if you want to be able to extract every sequence, I would suggest
the use of python iterator as it's more general. For that, you should
use the PyObject_GetIter function (or there is a boost object ???) and
then use the "next" attribute like this :

void set( boost::python::object o ) 
{
  try
    {
      object iter_obj = object( handle<>( PyObject_GetIter( o.ptr() ) ) );
      while( 1 )
	{
	  object obj = extract