Lowell Kirsh wrote:
I'm not sure I get it. What's the purpose of using a delegate rather than having the object itself supply the return value?
Alex Martelli wrote:
Lowell Kirsh <[EMAIL PROTECTED]> wrote:
What might these exceptions be?
It's HIGHLY advisable to have your __getattr__ methods raise AttributeError for any requested name that starts and ends with double underscores, possibly with some specific and specifically designed exceptions.
For example, delegation of such requests to some other object: def __getattr__(self, name): return getattr(self._delegate, name)
In such cases you may decide you do not need to block __specials__, because you're OK with having self._delegate supply them or be responsible to raise AttributeError if necessary.
Alex
The point is that you can keep a reference to some object, and it's the next best thing to having subclassed the object's class but with closer control.
regards Steve
A: Top-posting Q: What puts things in the wrong order on newsgroup postings -- Meet the Python developers and your c.l.py favorites March 23-25 Come to PyCon DC 2005 http://www.python.org/pycon/2005/ Steve Holden http://www.holdenweb.com/ -- http://mail.python.org/mailman/listinfo/python-list
