Maybe it's more the `a ||= b` that acts like a `a = a or b` in Python?
But then I don't think there is a confusion on Python side because
languages with a || operator usually already has a simple | with a
different meaning.
Le jeu. 27 févr. 2020 à 00:28, Nick Coghlan <ncogh...@gmail.com> a écrit :
>
>
>
> On Thu., 27 Feb. 2020, 2:03 am Guido van Rossum, <gu...@python.org> wrote:
>>
>> On Wed, Feb 26, 2020 at 7:43 AM Claudio Jolowicz <cjolow...@gmail.com> wrote:
>>>
>>> In my experience, the expression `value |= other` is a common idiom across
>>> programming languages to provide a default for `value` if it is "unset".
>>
>>
>> Interesting. Can you point to specific examples of this? In what other
>> languages have you seen this? (Not that it would make us change PEP 584, but
>> if this appears common we could probably warn about it prominently in docs
>> and tutorials.)
>
>
> I was thinking that bash scripting might be an example, but I double checked,
> and that's spelled 'VAR="${$VAR:-default value}" '
>
> make has 'VAR ?= "default value"'
>
> C# uses "??=" for null coalescence on assignment.
>
> So I've also never come across "|=" being used for this purpose.
>
> Cheers,
> Nick.
>
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