[Python-ideas] Re: PEP 671: Syntax for late-bound function argument defaults

Love the proposed syntax, it's clear and visible without being verbose. I was a bit worried with the "=:" syntax as, at first glance, it can be easily mistaken with a regular "=" but you can't miss "=>". Also, I think the syntax fits really well with the meaning of the operator, which is important. I'm also partial to "?=", as a second option, as it reads like a ternary operator (x?=len(y) -> x if x else len(y)) The point about scope for late-binding is also interesting and a good idea. It gives us what I think is powerful syntax for OO: class Foo: def bar(self, baz=>self.baz): ... This is great! +10 from me.