This will copy lists and keep references to all other objects.
Extending it to also copy other mutable objects like dictionaries is
left as an excercise to the reader:-)
And, of course, Guido will probably post a much more elegant and
-- Jack Jansen | If I can't dance I don't want to be part of Jack.Jansen@cwi.nl | your revolution -- Emma Goldman uunet!cwi.nl!jack G=Jack;S=Jansen;O=cwi;PRMD=surf;ADMD=400net;C=nl