On Tue, Jan 21, 2014 at 12:07 PM, Joseph L. Casale <jcas...@activenetwerx.com> wrote: > foo = MyClass() > # This calls __set__ > foo.some_property = [x for x in range(5)] > # This bypasses __set__ obviously. > foo.some_property.append(5) > > So re-implementing my own list class has the draw back for the user that he > must create the > data type is assigning directly. I want to avoid this. What workaround can I > leverage to catch > the append event so I can avoid the new data type?
You're going to have to subclass list if you want to intercept its methods. As I see it, there are two ways you could do that: when it's set, or when it's retrieved. I'd be inclined to do it in __set__, but either could work. In theory, you could make it practically invisible - just check to see if you're trying to __set__ a list, and if you are, set a magical list instead. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
