> On an unrelated note, I'm curious, what's the difference between an > instance of an object, and an instance of an empty class? Calling the > object builtin returns an <object object at ...>, which I would expect > would function the same as a 'class blah(object): pass', but they do > not function similarly at all. > > >>> class A(object): pass > >>> a = A() > >>> a.i = 5 > >>> a.i > 5 > >>> > > >>> a = object() > >>> a.i = 5 > Traceback (most recent call last): > File "<stdin>", line 1, in ? > AttributeError: 'object' object has no attribute 'i' Instances of 'object' don't have an instance dict, so they are uncapable of having instance variables. When you use a class statement, instances of the subclass get an instance dict, unless __slots__ is used in that class statement. --Guido van Rossum (home page: http://www.python.org/~guido/)
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