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Final tweaks: 

- fix the __str__, __unicode__ and __repr__ methods
- some textual tweaks
- add Python 3.0 to the transition plan
This commit is contained in:
Guido van Rossum 2005-10-31 19:22:43 +00:00
parent 0fcf41f3cd
commit 3040eb4a06
1 changed files with 29 additions and 27 deletions
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32
pep-0352.txt
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@ -71,20 +71,19 @@ will cause the deprecation of the existing ``args`` attribute)::
def __str__(self): def __str__(self):
"""Return the str of 'message'""" """Return the str of 'message'"""
return str(self.message return str(self.message
if not self.args if len(self.args) <= 1
else self.args) else self.args)
def __unicode__(self): def __unicode__(self):
"""Return the unicode of 'message'""" """Return the unicode of 'message'"""
return unicode(self.message return unicode(self.message
if not self.args if len(self.args) <= 1
else self.args) else self.args)
def __repr__(self): def __repr__(self):
args_repr = (repr(self.message) if (len(self.args) <= 1):
if not self.args return "%s(%r)" % (self.__class__.__name__, self.message)
else "*%r" % self.args) return "%s%r" % (self.__class__.__name__, self.args)
return "%s(%s)" % (self.__class__.__name__, args_repr)
def __getitem__(self, index): def __getitem__(self, index):
"""Index into arguments passed in during instantiation. """Index into arguments passed in during instantiation.
@ -96,16 +95,16 @@ will cause the deprecation of the existing ``args`` attribute)::
return self.args[index] return self.args[index]
The ``message`` attribute will contain either the argument passed in The ``message`` attribute will contain either the first argument
at instantiation of the object or the empty string. The attribute is passed in at instantiation of the object or the empty string if no
meant to act as a common location to store any extra information that arguments were passed in. The attribute is meant to act as a common
is to be passed along with the exception that goes beyond the location location to store any extra information that is to be passed along
of the exception within the exception hierarchy and the exception's with the exception that goes beyond the location of the exception
type. within the exception hierarchy and the exception's type.
No restriction is placed upon what may be passed in for ``messsage``. No restriction is placed upon what may be passed in for ``messsage``.
This provides backwards-compatibility with how the argument passed This provides backwards-compatibility with how the arguments passed
into Exception has no restrictions. into Exception have no restrictions.
The ``args`` attribute is deprecated. While allowing multiple The ``args`` attribute is deprecated. While allowing multiple
arguments to be passed can be helpful, it is in no way essential. It arguments to be passed can be helpful, it is in no way essential. It
@ -214,11 +213,14 @@ specifically listed.
- deprecate catching exceptions that do not inherit from BaseException - deprecate catching exceptions that do not inherit from BaseException
* Python 2.9 * Python 2.9
- deprecate ``args`` and ``__getitem__`` - deprecate ``args`` and ``__getitem__``
* Python 3.0
- drop ``args`` and ``__getitem__``
References References
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