use None - that is effectively what you need.
unless of course None is valid in your data set.
--
Anthony Flury
email : anthony.fl...@btinternet.com
Twitter : @TonyFlury
> On Jul 25, 2022, at 10:43 AM, Михаил Крупенков wrote:
>
>
> Yes, I want that when Void is received in a function par
When I have needed this I have added a separate _factory keyword argument
to my function - so the user can specify a value to or a callable to
_factory with the doc string clearly spelling out the semantics - and
what happens if neither is passed - yes another argument but the semantics are
e
