2017-03-03 6:13 GMT+01:00 Mike Miller <python-id...@mgmiller.net>:
> Agreed, I've rarely found a need for a "second None" or sentinel either, but
> once every few years I do.  So, this use case doesn't seem to be common
> enough to devote special syntax or a keyword to from my perspective.

The question here is how to have an official support of this feature
in inspect.signature().

If we go to the special value (singleton) way, Ellispis doesn't work
neither since a few modules use Ellipsis for legit use case. Recent
user: the typing module for "Callable[[arg, ...], result]".

Victor
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