[Tutor] recursive problem

[Lie Ryan]

On 09/12/10 04:01, Walter Prins wrote:
> I guess the question to ask/consider is: How can be establish whether a
> particular object supports a particular interface/set of behaviours that
> we require?  E.g. how do we most pythonically check whether some object
> "walks like a list" and "quacks like a list" without tying such code to
> explicit type checking?

In Python? By treating it like a list; and shooting the duck in their
webby feet when it doesn't act like a list.