recently I have been experimenting with a new api for blender3d, one of the things it needs to be able to do is give python errors (tracebacks) to our own error reporting api.
The problem is that Python/C api has no way to get the text that PyErr_Print() prints, as a string.
This seems not such an unusual thing for an api to require, after all, many applications dont run with a console to display text.
So far I think there are 3 ways to do this. that pipe. I havnt tried this yet and I'm not sure if its a good cross
- Create a pipe, open it with fdopen(), then temporarily replace stderr and stdout and call PyErr_Print().... then get the text from
platform solution. that builds a string rather then printing it. This really isnt an
- Copy and paste Pythons C traceback function into my own function
attractive option.
- Use pythons traceback module from C (this isnt so bad, but Id prefer not to have core parts of our api relying on *.py modules)
Is there some other way to do this? or is anyone currently doing this in their application?
Here is the Python 3.x C api code for getting the traceback. -------------------- snip
static void pyop_error_report(ReportList *reports) { /* # in python this would be... import traceback string = ' '.join(traceback.format_exc()) */ PyObject *type, *value, *traceback;
PyObject *mod;
PyObject *ret, *list, *string, *args;
/* Save the current exception */
PyErr_Fetch(&type, &value, &traceback);
mod = PyImport_ImportModule("traceback");
if (!mod) {
/* print some error */
return;
}
list= PyObject_CallMethod(mod, "format_exception", "OOO", type,value, traceback);
string= PyUnicode_FromString("\n");
ret= PyUnicode_Join(string, list);
Py_DECREF(list);
Py_DECREF(string);
BKE_report(reports, RPT_ERROR, _PyUnicode_AsString(ret));
Py_DECREF(ret);
PyErr_Clear();}
--
- Campbell