make_tuple with boost::python under Visual Studio 9 -

trying build following simple example

#include <boost/python.hpp>  using namespace boost::python; tuple head_and_tail(object sequence) {     return make_tuple(sequence[0],sequence[-1]); } 

available here, end compilation error under visual studio 9

error c2668: 'boost::python::make_tuple' : ambiguous call overloaded function 1>        c:\program files\boost_1_42_0\boost/python/detail/make_tuple.hpp(22): 'boost::python::tuple boost::python::make_tuple<boost::python::api::object_item,boost::python::api::object_item>(const a0 &,const a1 &)' 1>        1>        [ 1>            a0=boost::python::api::object_item, 1>            a1=boost::python::api::object_item 1>        ] 1>        c:\program files\boost_1_42_0\boost/tuple/detail/tuple_basic.hpp(802): or       'boost::tuples::tuple<t0,t1,t2,t3,t4,t5,t6,t7,t8,t9> boost::tuples::make_tuple<boost::python::api::object_item,boost::python::api::object_item>(const t0 &,const t1 &)' [found using argument-dependent lookup] 1>        1>        [ 1>            t0=boost::python::api::proxy<boost::python::api::item_policies>, 1>            t1=boost::python::api::proxy<boost::python::api::item_policies>, 1>            t2=boost::tuples::null_type, 1>            t3=boost::tuples::null_type, 1>            t4=boost::tuples::null_type, 1>            t5=boost::tuples::null_type, 1>            t6=boost::tuples::null_type, 1>            t7=boost::tuples::null_type, 1>            t8=boost::tuples::null_type, 1>            t9=boost::tuples::null_type 1>        ] 

is bug in boost::python, or doing wrong? how can above program compile?

using full namespace, fixes problem:

#include <boost/python.hpp>  using namespace boost::python; tuple head_and_tail(object sequence) {     return boost::python::make_tuple(sequence[0],sequence[-1]); }