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Thu Oct 10 00:12:45 CEST 2013 · https://mail.python.org/pipermail/python-dev/2013-October/129351.html

On Wed, Oct 09, 2013 at 02:25:18PM -0400, Terry Reedy wrote:

> Unlike Georg, I think '/' is plausibly ok. You should, however, 
> explicitly say in the PEP that it was selected not randomly but by rough 
> analogy. Division (/) is the inverse of multiplication (*), and 
> positional-only is sort of the 'inverse' of keyword-only. (If I am 
> wrong, and the above is just an accident, it is at least a way to 
> remember ;-).

I recall that was exactly the analogy Guido used when he first suggested 
the syntax.

-- 
Steven

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[Python-Dev] PEP 457: Syntax For Positional-Only Parameters