On Tue, 2009-12-01 at 14:38 +0000, Steven D'Aprano wrote: > On Mon, 30 Nov 2009 18:55:46 -0800, The Music Guy wrote: > > > Lie Ryan, I think I see what you're saying about using __dict__ to add > > members to a class, but it's not quite the same. __dict__ is only for > > attributes, NOT properties, methods, etc. which all come from the class > > of an object rather than the object's __dict__. > > Almost but not quite. > > It's just special double-underscore methods like __init__ __add__ etc > that have to be in the class rather than the instance. (To be precise, > you can add such a method to the instance, but it won't be called > automatically.) Likewise staticmethods and classmethods won't work > correctly unless they are in the class. But ordinary methods work fine: > the only tricky bit is creating them in the first place. > > >>> class K(object): > ... pass > ... > >>> k = K() > >>> import types > >>> k.method = types.MethodType(lambda self: "I am %s" % self, k) > >>> k.method() > 'I am <__main__.K object at 0xb7cc7d4c>'
...I'm not sure I follow your logic. Yes, you can create an instancemethod out of a function and assign it to an instance after (or during) its instantiation, which is what Python's class/instance model provides automatically. However, to do so manually in this manner completely disregards the fundamentals of object-oriented programming, not to mention the basic guiding principles of nearly all Python code in existence. It totally breaks inheritance and polymorphism. Maybe I'm missing something, but I can't see how that line of thought helps anything. -- http://mail.python.org/mailman/listinfo/python-list
