On 5/6/2020 8:33 PM, Chris Angelico wrote:
On Thu, May 7, 2020 at 10:27 AM David Mertz <me...@gnosis.cx> wrote:
The only precedent that jumps out for me is itertools.chain() and
itertools.chain.from_iterable(). It's quite likely that something I don't use
much has used the same pattern though.
(Please don't top-post - you're making it hard to give proper context.
Precedent for what?)
That's an example of a very common pattern of alternate constructors.
So if you want to parallel that with zip, the most logical way would
be something like zip.from_same_length_iterables() or some
abbreviation. And then zip_longest could become
zip.from_iterables_and_fill().
I think David is right: itertools.chain.from_iterable() is the only
place I know of with an attribute on a function that's another function.
Alternate constructors are generally classmethods. Not that the
distinction is terribly important, but it is a distinction, and it's
documented differently.
And it's the documentation that I'm concerned about: I don't think
itertools.chain.from_iterable() is very discoverable. Plenty of people
don't know it exists. That's my concern with this approach.
Eric
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