Hi If I derive a class (eg Matrix) from list I presume this implies the classic OOP 'is a' relation between the derived and super class.
I therefore presume I can use a derived class in any context that I can use the superclass. In the given example I want to apply deepcopy() to the Matrix instance (on initialisation) to ensure that the list part is not affected by subsequent changes to the initialising list or Matrix but this gives me a string of errors (some of which imply I'm trying to copy the class rather than the instance). Anyone got any thoughts on this???? Phil -- http://mail.python.org/mailman/listinfo/python-list
