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

[Ralf Grosse-Kunstleve]

without having looked at your code ...

most likely this is a memory issue. run with valgrind (valgrind.org or man
valgrind) to pin-point the problem.

On Fri, Jul 20, 2012 at 7:55 AM, Ronny Herzog <herzog at mpi-cbg.de> wrote:

>
> 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
>
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