PyErr_Fetch(&ptype, &pvalue, &ptraceback);
PyErr_NormalizeException(&ptype, &pvalue, &ptraceback);
pstr = PyObject_Str(pvalue);
PyErr_Fetch(&ptype, &pvalue, &ptraceback);
PyErr_NormalizeException(&ptype, &pvalue, &ptraceback);
pstr = PyObject_Str(pvalue);