static void
setstate (layer& l, boost::python::tuple state)
{
using namespace boost::python;
if (len(state) != 9)
{
PyErr_SetObject(PyExc_ValueError,
("expected 9-item tuple in call to __setstate__; got %s"
% state).ptr()
);
throw_error_already_set();
}
l.set_clear_label_cache(extract<bool>(state[0]));
l.set_min_zoom(extract<double>(state[1]));
l.set_max_zoom(extract<double>(state[2]));
l.set_queryable(extract<bool>(state[3]));
mapnik::parameters params = extract<parameters>(state[4]);
l.set_datasource(datasource_cache::instance().create(params));
boost::python::list s = extract<boost::python::list>(state[5]);
for (int i=0;i<len(s);++i)
{
l.add_style(extract<std::string>(s[i]));
}
l.set_cache_features(extract<bool>(state[6]));
}