Talin asked: > Also, on a completely different subject: Has there been much discussion > about extending the use of the 'is' keyword to do type comparisons a la > C# (e.g. "if x is list:") ? > > -- Talin
No, is already has a specific, well defined meaning - object identity. IDLE 1.1 >>> a = [1,2,3] >>> a is list False >>> b = type(a) >>> b <type 'list'> >>> b is list True "Extending it" to mean something entirely different to what it currently means is a bad idea, and is also unnessecary - the builtin function isinstance already provides the functionaliy you're looking for: >>> isinstance(b, list) False >>> isinstance(a, list) True >>> However, use sparingly - calling isinstance unnessecarily rather than relying on polymorphism is considered pretty unpythonic, and usually reflects pretty poor OO design. -- http://mail.python.org/mailman/listinfo/python-list
