over covering on sys.exc_info()

keep_exc.py

#!/usr/bin/env python
#-*- coding:utf-8 -*-
# Author: Kun Huang <academicgareth@gmail.com>
# Created Time: 06/06/13 22:23:18 (CST)
# Modified Time: 07/09/13 12:03:40 (CST)
import sys
try:
    raise ValueError('ddd')
except Exception as dd:
    dd_exc = sys.exc_info()
    try:
        raise ValueError('eee')
    except Exception as ee:
        pass
    raise dd_exc[0], dd_exc[1], dd_exc[2] # this raise dd
    #raise dd_exc # this raise doesn't work
    #raise # this raise ee