gistfile1.cpp

string GetPythonErrorString()
{
  try{
    PyObject *ptype, *pvalue, *ptraceback;
    PyErr_Fetch(&ptype, &pvalue, &ptraceback);

    object prev_stderr = import("sys").attr("stderr");
    object output_cacher = import("cStringIO").attr("StringIO")();
    import("sys").attr("stderr") = output_cacher;

    PyErr_Restore(ptype, pvalue, ptraceback);
    PyErr_Print();

    import("sys").attr("stderr") = prev_stderr;

    return extract<string>(output_cacher.attr("getvalue")())();
  }catch(...){
    handle_exception();
    PyErr_Clear();
    return "";
  }
}