En Fri, 22 Jun 2007 03:43:26 -0300, Roc Zhou <[EMAIL PROTECTED]> escribió:
> I'm sorry but I still have a question, look at this example: >>>> class test: > ... def __init__(self): > ... self.x = 1 > ... def __getattr__(self, attr_name): > ... print attr_name > ... if attr_name == 'y': > ... return 2 > ... else: > ... raise AttributeError, attr_name > ... >>>> t = test() >>>> t.x > 1 >>>> t.y > y > 2 >>>> print t.x > 1 >>>> print t > __str__ > __repr__ > <__main__.test instance at 0xb7f6d6cc> > > Since __str__ and __repr__ does not exist because their names was > printed, why not the "AttributeError" be raised? This is the implementation of str() in action; tries to find a __str__ method and fails; tries to find a __repr__ instead and fails; then uses the default representation. See <http://docs.python.org/ref/customization.html#l2h-179> -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
