异常处理

try: 
    name = [‘a‘,‘b‘,‘c‘]
    name[5]      ##定义错误的索引，IndexError
    info_dic = {}
    info_dic[‘a‘]    ##定义错误的键值，KeyError
    
except IndexError:
    print ‘Your list is out of range...‘
except KeyError:
    print ‘Your dic is out of key... ‘

##except (IndexError,KeyError):      等同上面，同时抓取两个错误

#!/usr/bin/python
# -*- coding: UTF-8 -*-
try:
    fh = open("testfile", "w")
    fh.write("这是一个测试文件，用于测试异常!!")
finally:
    print "Error: 没有找到文件或读取文件失败"

$ python test.py 
Error: 没有找到文件或读取文件失败

try:
    10/0
except Exception as e:
    print ‘aaaaaaa‘, e
    raise e
else:
    print(‘ok‘)
finally:
    print(‘finally‘)
print(‘hello world‘)

aaaaaaa integer division or modulo by zero
Traceback (most recent call last):
finally
  File "E:/test/test.py", line 11, in <module>
    raise e
ZeroDivisionError: integer division or modulo by zero