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Fri Jan 24 16:53:22 CET 2014 · https://mail.python.org/pipermail/python-dev/2014-January/132010.html

On Fri, Jan 24, 2014 at 10:50 AM, Ram Rachum <ram at rachum.com> wrote:

> I don't like how in Python 3.x, you can't do this:
>
>     lambda (x, y): whatever
>
> It's quite useful in Python 2
>
> if I understand correctly, it's a side effect of such packed arguments not
> being allowed in function definitions. (i.e. def instead of lambda)
>
> Can you please refer me to the original discussion in which it was decided
> to remove this grammar in Python 3? I'd like to understand the arguments
> for it.
>

http://python.org/dev/peps/pep-3113/
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[Python-Dev] lambda (x, y):