On Sat, Jun 22, 2013 at 11:31 AM, Steven D'Aprano <steve+comp.lang.pyt...@pearwood.info> wrote: > Thinking about this, I think that the only safe thing to do in Rickython > 4000 is to prohibit putting mutable objects inside tuples. Putting a list > or a dict inside a tuple is just a bug waiting to happen!
I think you're onto something here, but you really haven't gone far enough. Mutable objects *anywhere* are a problem. The solution? Abolish mutable objects. Strings (bytes and Unicode), integers, decimals (floats are a problem to many people), tuples of the above, and dictionaries mapping any of the above to any other of the above, should be enough to do everything. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
