[Python-ideas] Re: Argumenting in favor of first()

Dec. 8, 2019


      On Sun, Dec 8, 2019 at 11:03 AM Anders Hovmöller <boxed@killingar.net>
wrote:
...
...
On 8 Dec 2019, at 19:40, Guido van Rossum <guido@python.org> wrote:
def first(it, /, default=None):
    it = iter(it)
    try:
        return next(it)
    except StopIteration:
        return default
Why ban the use of keyword argument for the default value?
You must misremember PEP 570. This use of `/` means that `it` must be
passed positional (it's mandatory and it's the "main" argument), but that
`default` can be specified positionally or via a keyword.

-- 
--Guido van Rossum (python.org/~guido)
*Pronouns: he/him **(why is my pronoun here?)*
<http://feministing.com/2015/02/03/how-using-they-as-a-singular-pronoun-can-c...>