On 2020-05-01 3:41 p.m., Chris Angelico wrote:
On Sat, May 2, 2020 at 4:38 AM Soni L. <fakedme+py@gmail.com> wrote:
On 2020-05-01 3:10 p.m., Brandt Bucher wrote:
I have pushed a first draft of PEP 618:
https://www.python.org/dev/peps/pep-0618
Please let me know what you think – I'd love to hear any *new* feedback that hasn't yet been addressed in the PEP!
What about using an optional kwarg for a handler for mismatched lengths? I made a post about it on the other thread and it's not addressed in the PEP. It'd make zip capable of doing zip_shortest, zip_equal (aka zip(strict=True)) and zip_longest, it's not stringly-typed, and it's user-extensible. Something along the lines of zip(foo, bar, baz, and_then=lambda consumed_items, iters: ...).
YAGNI.
examples: # iterates in chunks, e.g. a very large file that wouldn't fit all in RAM zip(*[iter(x)]*32, and_then=lambda res, _: (yield res)) # strict zip sentinel = object() def zip_eq(res, iters): if res or any(next(x, sentinel) is not sentinel for x in iters): raise ValueError zip(a, b, c, and_then=zip_eq) # this would ideally be zip.strict e.g. zip(a, b, c, and_then=zip.strict), but w/e. # normal (shortest) zip but using an explicit function def no_op(*args, **kwargs): pass zip(a, b, c, and_then=no_op)
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