I'm trying to find the source of . .

phpjunkie · July 3, 2026, 8:43pm

I’m trying to locate the source that sys.excepthook points to in the GitHub repository so I can see the design and how it colors the exceptions, and I’m having a hard time finding it.

Stanfromireland · July 3, 2026, 8:48pm

The implementation of sys.excepthook lives in Python/sysmodule.c:

github.com/python/cpython

Python/sysmodule.c

cde31ec13


      
          /*[clinic input]
          sys.excepthook
          
              exctype:   object
              value:     object
              traceback: object
              /
          
          Handle an exception by displaying it with a traceback on sys.stderr.
          [clinic start generated code]*/
          
          static PyObject *
          sys_excepthook_impl(PyObject *module, PyObject *exctype, PyObject *value,
                              PyObject *traceback)
          /*[clinic end generated code: output=18d99fdda21b6b5e input=ecf606fa826f19d9]*/
          {
              PyErr_Display(NULL, value, traceback);
              Py_RETURN_NONE;
          }