On Wed, Dec 1, 2021 at 2:17 AM Chris Angelico <ros...@gmail.com> wrote:
> I've just updated PEP 671 https://www.python.org/dev/peps/pep-0671/ > with some additional information about the reference implementation, > and some clarifications elsewhere. > > *PEP 671: Syntax for late-bound function argument defaults* > > Questions, for you all: > > 1) If this feature existed in Python 3.11 exactly as described, would > you use it? > > Currently, I'm thinking "absolutely not". However, I thought the same about the walrus operator and I now miss not being able to use it in a program that includes support for Python 3.6 and where I have literally dozens of places where I would use it if I could. > 2) Independently: Is the syntactic distinction between "=" and "=>" a > cognitive burden? > Yes. I really think that using a keyword like defer, or from_calling_scope ;-), would significantly reduce the cognitive burden. > 4) If "no" to question 1, is there some other spelling or other small > change that WOULD mean you would use it? (Some examples in the PEP.) > *Perhaps* if a keyword would be used instead of symbols, I might reconsider. I find the emphasis of trying to cram too much information in single lines of code to be really a burden. Many years ago, I argued very unsuccessfully for using a 'where:' code block for annotations. (To this day, I still believe it would make the code much more readable, at the cost of a slight duplication.) Using what is at first glance a cryptic operator like => for late binding is not helping readability, especially when type annotations are thrown in the mix. Aside: at the same time, I can see how using => instead of lambda as a potential win in readability, including for beginners. > 5) Do you know how to compile CPython from source, and would you be > willing to try this out? Please? :) > Sorry, I'm not interested enough at this point but, given the amount of work you put into this, I decided that the least I could do is provide feedback rather than be a passive reader. André Roberge > _______________________________________________ > Python-ideas mailing list -- python-ideas@python.org > To unsubscribe send an email to python-ideas-le...@python.org > https://mail.python.org/mailman3/lists/python-ideas.python.org/ > Message archived at > https://mail.python.org/archives/list/python-ideas@python.org/message/UVOQEK7IRFSCBOH734T5GFJOEJXFCR6A/ > Code of Conduct: http://python.org/psf/codeofconduct/ >
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