PEP 570: Python Positional-Only Parameters

[guido (Guido van Rossum)]

@storchaka

See issue36518 which significantly decreases the need in positional-only parameters in Python (although PEP 570 still has a value for solving other problems). The change is surprisingly tiny.

I would like to consider that separately, and very carefully – in fact I think it’s PEP-worthy, not something to just do with a BPO issue and a GitHub PR. It is a very subtle change in the meaning of **kwds, affecting every function whose definition uses **kwds. It certainly doesn’t solve the problems that PEP 570 sets out to solve.