[Python-Dev] PEP 457: Syntax For Positional-Only Parameters (original) (raw)

Benjamin Peterson benjamin at python.org
Wed Oct 9 03:31:56 CEST 2013

2013/10/8 Larry Hastings <larry at hastings.org>:

This PEP proposes a backwards-compatible syntax that should permit implementing any builtin in pure Python code.

This is rather too strong. You can certainly implement them; you just have to implement the argument parsing yourself. Python's call/signature syntax is already extremely expressive, and resolving call arguments to formal parameters is already a complicated (and slow) process. Implementing functions with such strange argument semantics is hardly common enough to justify the whole grouping syntax proposed in this PEP. -1 to that. I think I can live with "/", but YANGTNI still.

-- Regards, Benjamin

More information about the Python-Dev mailing list