Infinitely nested containers

Chris Angelico rosuav at gmail.com
Fri Nov 21 18:47:55 CET 2014


On Sat, Nov 22, 2014 at 4:39 AM,  <random832 at fastmail.us> wrote:
> There's no reason not to allow it with tuples, but you can't do it.
> Mainly because doing it in a single literal would require special
> syntax, whereas you can simply append to a list a reference to itself.
>
> I think I tried on at least one python version and printing the tuple
> crashed with a recursion depth error, since it had no special protection
> for this case the way list printing does.

You can do it in C, I believe - PyTuple_New() followed by
PyTuple_SetItem(x, 0, x) should do it.

ChrisA



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