The problem of unintended inheritance is typical for OO frameworks and can be explained as follows. Given a class Foo implemented by Alice and a derived class Bar of Foo implemented by Bob. Bar implements a method f. In a later version of Foo Alice also implements a method f. The f of Bar overrides the f of Foo unintentionally. If an instance bar of Bar will be created and some method g of Foo calls f it is the wrong f, namely the one of bar will be called.
To prevent unintended inheritance C# introduced a relatively complex contract semantics using three modifiers virtual, override and new. Is this issue serious for Python programmers, in particular for those working in larger projects ( Twisted, Zope ... ) or is it not? If not, why not? Kay -- http://mail.python.org/mailman/listinfo/python-list
