code: def showtraceback(self, *args, **kwargs):
          
          try:
              type, value, tb = sys.exc_info()
              sys.last_type = type
              sys.last_value = value
              sys.last_traceback = tb
              tblist = traceback.extract_tb(tb)
              del tblist[:1]
              list = traceback.format_list(tblist)
              if list:
                  list.insert(0, "Traceback (most recent call last):\n")
              list[len(list):] = traceback.format_exception_only(type, value)
          finally:
              tblist = tb = None
          map(self.write, list)
docs: Display the exception that just occurred.
  
          We remove the first stack item because it is our own code.
  
          The output is written by self.write(), below.