code: def print_last(limit=None, file=None):
      
      if not hasattr(sys, "last_type"):
          raise ValueError("no last exception")
      if file is None:
          file = sys.stderr
      print_exception(sys.last_type, sys.last_value, sys.last_traceback,
                      limit, file)
docs: This is a shorthand for 'print_exception(sys.last_type,
      sys.last_value, sys.last_traceback, limit, file)'.