1 class ShortInputException(Exception):
2 def __init__(self, length, atleast):
3 Exception.__init__(self)
4 self.length = length
5 self.atleast = atleast
6
7 try:
8 s = raw_input('Enter something --> ')
9
10 if len(s) < 3 :
11 raise ShortInputException(len(s), 3)
12 except EOFError:
13 print '\nWhy did you do an EOF on me?'
14 except ShortInputException, x:
15 print 'ShortInputException: The input was of length %d, \
16 was expecting at least %d' % (x.length, x.atleast)
17 else:
18 print 'No exception was raised.'
x就是 ShortInputException的对象
这是python 2.6之前的语法
2.6之后建议使用 except ShortInputException as x:
