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Mon Feb 6 15:11:20 CET 2006 · https://mail.python.org/pipermail/python-dev/2006-February/060450.html

On Fri, 2006-02-03 at 20:02 +0100, "Martin v. Löwis" wrote:
> Donovan Baarda wrote:
> > Before set() the standard way to do them was to use dicts with None
> > Values... to me the "{1,2,3}" syntax would have been a logical extension
> > of the "a set is a dict with no values, only keys" mindset. I don't know
> > why it wasn't done this way in the first place, though I missed the
> > arguments where it was rejected.
> 
> There might be many reasons; one obvious reason is that you can't spell
> the empty set that way.

Hmm... how about "{,}", which is the same trick tuples use for the empty
tuple?

-- 
Donovan Baarda <abo at minkirri.apana.org.au>
http://minkirri.apana.org.au/~abo/

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[Python-Dev] syntactic support for sets