[Python-ideas] Using "||" (doubled pipe) as the null coalescing operator?

Nick Coghlan ncoghlan at gmail.com
Thu Sep 24 05:00:39 CEST 2015

On 24 Sep 2015 01:59, "Nick Coghlan" <ncoghlan at gmail.com> wrote:
> The only other potential spelling of the coalescence case that comes
> to mind is to make "?" available in conditional expressions as a
> reference to the LHS:
>     data = data if ? is not None else []
>     headers = headers if ? is not None else {}
>     title = user_title if ? is not None else local_default_title if ?
> is not None else global_default_title

One advantage of this more explicit spelling is that it permits sentinels
other than None in the expanded form:

    data = data if ? is not sentinel else default()

Only the shorthand cases (augmented assignment, attribute access, subscript
lookup) would be restricted to checking specifically against None.

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