[Python-ideas] Null coalescing operators

[Sven R. Kunze]

On 19.09.2015 01:18, Erik wrote:
> Apologies for the self-reply. I just wanted to clarify a couple of 
> things.
>
> On 18/09/15 23:56, Erik wrote:
>> If the foo operator uses the magic method "__foo__" to mean "return an
>> object to be used in place of the operand should it be considered ...
>> false? [or some other definition - I'm not sure]"
>
> Not "false", I think. The "foo" operator is meant to mean "I will go 
> on to use the resulting object in any way imaginable and it must cope 
> with that and return a value from any attempts to use it that will 
> generally mean 'no'" (*).
>
>> If that was a postfix operator which has a high precedence, then:
>>
>> bar = foo?
>> bar.isoformat()
>>
>> and the original syntax suggestion:
>>
>> bar = foo?.isoformat()
>
> Which is clearly wrong - the first part should be:
>
> baz = foo?
> bar = baz.isoformat()
>
> E.
>
> (*) Should we call the operator "shrug"?

Maybe monad?