On Wed, Jun 23, 2021 at 6:41 AM Soni L. <fakedme...@gmail.com> wrote: > > > > On 2021-06-22 5:23 p.m., Chris Angelico wrote: > > On Wed, Jun 23, 2021 at 6:13 AM Soni L. <fakedme...@gmail.com> wrote: > > > Think about it like this, extension methods give you the ability to make > > > imported functions that look like this: > > > > > > foo(bar, baz) > > > > > > look like this instead: > > > > > > bar.foo(baz) > > > > > > That's all there is to them. They're just a lie to change how you > > > read/write the code. Some languages have an whole operator that has a > > > similar function, where something like bar->foo(baz) is sugar for > > > foo(bar, baz). The OP doesn't specify any particular mechanism for > > > extension methods, so e.g. making the dot operator be implemented by a > > > local function in the module, which delegates to the current attribute > > > lookup mechanism by default, would be perfectly acceptable. It's like > > > deprecating the existing dot operator and introducing a completely > > > different one that has nothing to do with attribute lookup! > > > > uh... I'm lost. Are you saying that that's a good thing? You *want* to > > replace the existing dot operator with one that has nothing to do with > > attribute lookup?? I don't get it. > > Sure! As long as the new one can call getattr! > > Let's say the new dot operator looks like this: > > # file1.py > def __dot__(left, right): > print(left) > print(right) > ... > foo = [] > foo.bar > > Now, this would actually print the list [] and the string "bar". > > Then you can just use getattr to get attribute lookup behaviour out of it! > > def __dot__(left, right): > return getattr(left, right) > foo = [] > foo.bar > > It would have local scope, similar to uh... locals. Y'know how locals > are just sugar for locals()['foo'] and stuff? Yeah.
Not really, no, they're not. :) The dictionary returned by locals() isn't actually an implementation detail of local name lookups. Have you put any thought into how you would deal with the problem of recursive __dot__ calls? ChrisA _______________________________________________ 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/NEI23TBWA3QKRGYIWTBJV3SK5O6MWXZC/ Code of Conduct: http://python.org/psf/codeofconduct/
