On Jun 23, 2020, at 12:27, Rob Cliffe via Python-Dev <python-dev@python.org>
wrote:
>
> On 23/06/2020 17:01, Guido van Rossum wrote:
>>
>> You can combine several literals in a single pattern using `|` ("or"):
>>
>> ```py
>> case 401|403|404:
>> return "Not allowed"
> The PEP is great, but this strikes me as horribly confusing, given that
> 401|403|404 is already legal syntax.
> IIUC any legal expression can come between `case` and `:`, but expressions
> that contain `|` at their outermost level are interpreted differently than
> from in other contexts.
> Presumably adding parentheses:
> case (401|403|404):
> would make it equivalent to
> case 407:
>
> Is a separator (other than whitespace) actually needed? Can the parser cope
> with
> case 401 403 404:
Maybe the PEP could support this syntax:
case in 401, 403, 404:
That seems like it would be both unambiguous and semantically obvious.
Cheers,
-Barry
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