异常处理1.3

3.代码友好，自动处理垃圾,with.


4.自己定义异常？继承exception类。


a
b
c


    import logging   
 
    logger = logging.getLogger()

    logfile = 'test.log'
    hdlr = logging.FileHandler('sendlog.txt')

    formatter = logging.Formatter('%(asctime)s %(levelname)s %(message)s')

    hdlr.setFormatter(formatter)

    logger.addHandler(hdlr)

    logger.setLevel(logging.NOTSET)



"""

import sys
import logging

try:
a+b
except:
exc = sys.exc_info()
logging.debug(exc[1])
#print exc