关于Exception Class的问题。

baif

UID: 41632
帖子: 79
积分: 181
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1^# baif 发表于 2005-11-28 11:07

关于Exception Class的问题。

[baif@Baif pydocs]$ cat myerror2.py

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CODE:

#! /bin/py
  # Filename: myerror2.py

  class MyError(Exception):
               def __int__(self, value):
                              self.value = value;
               def __str__(self):
                              return repr(self.value);
  try:
               raise MyError(4);
  except MyError, e:
               print e.value;

[baif@Baif pydocs]$ py myerror2.py

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CODE:

Traceback (most recent call last):
File "myerror2.py", line 12, in ?
print e.value;
AttributeError: MyError instance has no attribute 'value'

不行？我换import...

[baif@Baif pydocs]$ cat myerror.py

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CODE:

#! /bin/py
  # Filename: myerror.py

  class MyError(Exception):
               def __int__(self, value):
                              self.value = value;
               def __str__(self):
                              return repr(self.value);

[baif@Baif pydocs]$ py

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CODE:

Python 2.4.1 (#1, May 16 2005, 15:19:29)
  [GCC 4.0.0 20050512 (Red Hat 4.0.0-5)] on linux2
  Type "help", "copyright", "credits" or "license" for more information.
  >>> import myerror
  >>> dir(myerror.MyError)
  ['__doc__', '__getitem__', '__init__', '__int__', '__module__', '__str__']
  >>> try:
  ...          raise myerror.MyError(4);
  ... except myerror.MyError, e:
  ...          print e.value;
  ...
  Traceback (most recent call last):
File "<stdin>", line 4, in ?
  AttributeError: MyError instance has no attribute 'value'

还是不行啊
再试试。。。

[baif@Baif ~]$ py

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CODE:

Python 2.4.1 (#1, May 16 2005, 15:19:29)
[GCC 4.0.0 20050512 (Red Hat 4.0.0-5)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> class MyError(Exception):
...          def __init__(self, value):
...                            self.value = value;
...          def __str__(self):
...                            return repr(self.value);
...
>>> try:
...          raise MyError(4);
... except MyError, e:
...          print e.value;
...
4
>>>

行是行了，就是搞不清楚为什么会这样

tom_01

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2^# tom_01 发表于 2005-11-28 11:36

QUOTE:

原帖由 baif 于 2005-11-28 11:07 发表
[baif@Baif pydocs]$ cat myerror2.py[code]
#! /bin/py
  # Filename: myerror2.py

  class MyError(Exception):
               def __int__(self, value):
                              self.val ...

def __int__(self,value):#拼写错误

baif

UID: 41632
帖子: 79
积分: 181
在线时间: 8 小时

3^# baif 发表于 2005-11-28 17:47

真是还不如自己输入代码。