[Python-ideas] PEP 505 (None coalescing operators) thoughts

Terry Reedy tjreedy at udel.edu
Tue Sep 29 02:38:39 CEST 2015

On 9/28/2015 5:48 PM, Luciano Ramalho wrote:
> Glyph tweeted yesterday that everyone should watch the "Nothing is
> Something" 35' talk by Sandi Metz at RailsConf 2015. It's great and,
> in a way, relevant to this discussion.
> https://www.youtube.com/watch?v=29MAL8pJImQ

I understood Metz as advocation avoidig the nil (None) problem by giving 
every class an 'active nothing' that has the methods of the class.  We 
do that for most builtin classes -- 0, (), {}, etc.  She also used the 
identity function with a particular signature in various roles.

Terry Jan Reedy

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