Mike Meyer wrote:
> Peter Hansen <[EMAIL PROTECTED]> writes:
>
>
>>Mike Meyer wrote:
>>
>>>Yes. I once grabbed an old program that did assignments to None. But
>>>that's always been a bad idea.
>>
>>What was the use case!?
>
>
> Unpacking a tuple. Something like this:
>
> (foo, bar, None) = gen_tuple(stuff)
Goodness, that's bad form. I can just see someone copying it and doing:
(foo, bar, None) = gen_tuple(stuff)
if foo is None:
......
and wondering why the program doesn't work properly.
If you had to do that, you might try:
foo, bar, _ = gen_tuple(stuff)
or in a more complex case.
foo, _, _, bar, _, baz, _ = gen_tuple(stuff)
as '_' is already special cased (last result in interactive mode), and
is already used for "don't care" sematics in Prolog.
--
http://mail.python.org/mailman/listinfo/python-list
