2018-06-01 python印刷エラースタック

import logging
import traceback
def testPrintStackInfo(self):  
        try:  
            1 / 0   #       
        except BaseException as e:  
            #    1  
            msg = traceback.format_exc() 
            print (msg)  
            #    2  
            logging.exception(e)    
        finally:  
            pass  

エラーがなければmsgはNoneです.