[C++-sig] exporting a boost::python::dict containing a boost::python::list

[Ronny Herzog]

Dear all,

I want to export a boost::python::dict containing a boost::python::list. 
However, when I print this list in Python, I get an unlimited output of 
some strange numbers:

namespace bp = boost::python;

class readraw
{
....

		bp::list mk_pyPeak_list()
		{
			bp::list py_peak_list;
			for (int i = 0; i < peak_number; i++)
			{
				py_peak_list.append(bp::make_tuple(peak_list[0][i].mz, 
peak_list[0][i].intensity));
			}
			return py_peak_list;
		}

		bp::dict peak_list_info()
		{
			bp::dict info;
			//bp::object pn = peak_number;
			//info["peakNumber"] = peak_number;
			//std::cout << bp::extract<int>(mk_pyPeak_list().attr("__len__")();
			bp::list l(mk_pyPeak_list());
			info["peakList"] = l;

			return info;
		}
	};

BOOST_PYTHON_MODULE(readraw)
{
	bp::class_<readraw>("readraw", bp::init<int>())
		.def("add_peak", &readraw::add_peak)
		.def("peak_list_info", &readraw::peak_list_info)
		.def("average_scans", &readraw::average_scans)
		;

In Python:
 >>> print rawfilereader.peak_list_info()

Results in smth. like:
...
  (-431602080.0, -6.2774385622041925e+66), (-431602080.0, 
-6.2774385622041925e+66
), (-431602080.0, -6.2774385622041925e+66), (-431602080.0, 
-6.2774385622041925e+
66), (-431602080.0, -6.2774385622041925e+66), (-431602080.0, 
-6.2774385622041925
e+66), (-431602080.0, -6.2774385622041925e+66), (-431602080.0, 
-6.27743856220419
25e+66), (-431602080.0, -6.2774385622041925e+66), (-431602080.0, 
-6.277438562204
1925e+66), (-431602080.0, -6.2774385622041925e+66), (-431602080.0, 
-6.2774385622
041925e+66), (-431602080.0, -6.2774385622041925e+66), (-431602080.0, 
-6.27743856
...

What am I doing wrong?

Thanks for the help,
Ronny