Laura Creighton wrote:
don't fear mixins and multiple inheritance unduly. They are a practical solution for a lot of problems. You might have one of them.
I don't think mixins are a solution here, because they still require controlling the instantiation of the classes so that you can substitute a class that incorporates the mixin. This seems like a case of "adding new operations to existing things", for which the functional style is appropriate. If dispatching on the classes of the objects is needed, perhaps some implementation of generic functions may be of help, such as functools.singledispatch in Python 3.4, or PEAK-Rules. -- Greg -- https://mail.python.org/mailman/listinfo/python-list
