En Fri, 22 Jun 2007 02:48:50 -0300, Roc Zhou <[EMAIL PROTECTED]> escribió:
> I know what's wrong. Thank you. And I think > try: > return self.__dict__[attr_name] > is unnecessary, because python will do it itself for us. Exactly; by the time __getattr__ is called, you already know attr_name is not there. > So now I have to overload __str__, but how can I make self.__str__ > print as builtin str(): at here, I want get the result like: > <test instance at 0xb7bbb90c> > ? I would do the opposite: *only* create inexistent attributes when they are not "special". This way you don't mess with Python internals. ... def __getattr__(self, name): ... if name[:2]!='__' or name[-2:]!='__': ... self.__dict__[name] = 'inexistent' ... return self.__dict__[name] ... raise AttributeError,name This way you don't create "fake" attributes for things like __bases__ by example, and dir(), vars(), repr() etc. work as expected. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
