On Sun, Aug 30, 2020 at 8:36 PM Random832 <random...@fastmail.com> wrote:
> The thing that bothers me with new dunders is - can it be done in such a > way that *all* possible ways of calling it with only positional arguments > behave the same as presently when the old one is defined, and an intuitive > way with the new one, without requiring the calling bytecode to know which > signature is going to be used? > Probably not. (And knowing the signature is impossible -- there are too many layers of C code between the bytecode and the function object being called.) This is why I ended up with the simplest proposal possible -- keyword args get added to the end of `__getitem__` and `__setitem__`, ensuring that `d[1, k=3]` is like `d[1]` + keyword, not like `d[1,]` + keyword. -- --Guido van Rossum (python.org/~guido) *Pronouns: he/him **(why is my pronoun here?)* <http://feministing.com/2015/02/03/how-using-they-as-a-singular-pronoun-can-change-the-world/>
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