In article <33f40372-13fb-4d52-921d-8ab00685c...@q30g2000prq.googlegroups.com>, Sean DiZazzo <half.ital...@gmail.com> wrote: > >Why is it that you can setattr() on an instance of a class that >inherits from "object", but you can't on an instance of "object" >itself? > >>>> o = object() >>>> setattr(o, "x", 1000) >Traceback (most recent call last): > File "<stdin>", line 1, in <module> >AttributeError: 'object' object has no attribute 'x' > >>>> class Object(object):pass >... >>>> o = Object() >>>> setattr(o, "x", 1000) >>>> o.x >1000 > >I notice that the first example's instance doesn't have a __dict__. >Is the second way the idiom?
>>> class C(object): ... __slots__ = [] ... >>> x = C() >>> x.foo = 'bar' Traceback (most recent call last): File "<stdin>", line 1, in ? AttributeError: 'C' object has no attribute 'foo' -- Aahz (a...@pythoncraft.com) <*> http://www.pythoncraft.com/ "At Resolver we've found it useful to short-circuit any doubt and just refer to comments in code as 'lies'. :-)" --Michael Foord paraphrases Christian Muirhead on python-dev, 2009-3-22 -- http://mail.python.org/mailman/listinfo/python-list
