Python - Start interactive shell on exception

fail_interactive.py

#!/usr/bin/python

import sys
import os, traceback

try:
    pass    # put code that may fail here
except:
    print traceback.format_exc()              # print the exception
    os.environ['PYTHONINSPECT'] = 'Y'         # start interactive/inspect mode (like using the -i option)
    if 'PYTHONSTARTUP' in os.environ:
        pyrc = os.environ['PYTHONSTARTUP']
        if os.path.exists(pyrc):
            execfile(pyrc)                    # run the user's pythonstartup file if it exists