On Fri, Nov 21, 2014 at 4:54 PM, Gill Shen <gillar...@gmail.com> wrote: > How is this behavior implemented under the hood? And why is this allowed at > all? Is it just a curiosity or can you do something useful with it?
Simple: The list contains itself. When you dereference the list, you get back the original list. It does have value; you just have to be careful of any recursive operation like printing it out - the repr() for a list carefully checks for this. ChrisA -- https://mail.python.org/mailman/listinfo/python-list