Python 自定义一个 异常
2012-01-12
有时候,我们会遇到 系统自带的 异常不够用.
Python 提供了自定义异常类型
代码如下:
#!/usr/bin/env python
# encoding: utf-8
class ShortInputException(Exception):
def __init__(self, length, atleast):
Exception.__init__(self)
self.length = length
self.atleast = atleast
try :
s = raw_input('Enter something -->')
if len(s) < 3:
raise ShortInputException(len(s), 3)
except EOFError:
print '\nWhy did you do an EOF on me?'
except ShortInputException, x:
print 'ShortInputException: The input was of length %d, \
was expecting at least %d' % (x.length, x.atleast)
else :
print 'No exception was raised.'