I think only using the first third of the quote makes your argument too terse Steven.
To include the second part: "There should be one-- and preferably only one" which implies "It is preferable there is exactly one qualified pilot in the cockpit", and we arrive (if abbreviated) at what James said. However, to use the full quote as inspiration: "There must be at least one qualified pilot in the cockpit and there should not be a tie for seniority" and it flips again! Regardless Steven, I don't think it matters (except for setting the record straight[1]), they are not essential to his proposal? He uses this idea in his argument to say we should adopt *one* of := and ?=. Firstly, I think his application there is correct (if you assume at least one would be adopted, I think only one would be) but secondly I think his email has a strong air of false dichotomy: Python could well adopt a different solution or no solution at all and those are perfectly acceptable outcomes and I would advocate "no solution" as I prefer it over his two proposals. [1] https://xkcd.com/386/ On Tue, 19 May 2020 at 01:33, Steven D'Aprano <st...@pearwood.info> wrote: > On Mon, May 18, 2020 at 01:06:22PM -0000, James Lu wrote: > > > "There should be one-- and preferably only one --obvious way to do it." > > Yes? > > "There should be one" does not mean the same thing as "there shouldn't > be two". > > "There should be one qualified pilot in the cockpit of the plane at all > times during the flight" is not the same as "There should not be two > qualified pilots in the cockpit". > > > > -- > Steven > _______________________________________________ > Python-ideas mailing list -- python-ideas@python.org > To unsubscribe send an email to python-ideas-le...@python.org > https://mail.python.org/mailman3/lists/python-ideas.python.org/ > Message archived at > https://mail.python.org/archives/list/python-ideas@python.org/message/IA32WCRDPACLI6R562GDPETV6WQRUBSV/ > Code of Conduct: http://python.org/psf/codeofconduct/ >
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