[Python-ideas] function defaults and an empty() builtin

[Daniel Stutzbach]

On Thu, May 19, 2011 at 9:46 PM, Jack Diederich <jackdied at gmail.com> wrote:

> return nothing when asked for something and raise a ValueError when
> any attempt is made to add/remove items.
>

Couldn't you just use the empty immutable version for whatever type the
optional might be?  For sequences, use ().  For sets, use frozenset().  For
dicts, use ... oh.  Crap.

-- 
Daniel Stutzbach
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