Using your example (thanks, seeing a concrete example is helpful) it appears you can do it the SQL way in Python too:
x = (1 ,2 ,3 ) On Fri, 2021-03-12 at 16:35 -0500, Eric V. Smith wrote: > On 3/12/2021 3:37 PM, Greg Ewing wrote: > > On 13/03/21 5:02 am, Ned Batchelder wrote: > > > I think the only reason anyone ever used leading commas to begin > > > with > > > was because of languages that didn't allow a final trailing > > > comma. > > > In those worlds, to keep the editing smooth, people moved the > > > commas > > > to the beginning of the line, > > > > Which doesn't help unless the language allows leading commas that > > are ignored, and I've never seen a language like that. > > Things are added to the end of lists more often than to the front. > For > example, column names in SQL or parameters in Python. > > Because SQL doesn't allow trailing commas, I've often seen things > written as: > > select a > ,b > ,c > ,d > > Then when you want to add "e" to the end, you just duplicate the ",d" > row and change "d" to "e". > > For Python, you'd do: > > select(a, > b, > c, > d, > ) > > And then similarly add "e," to the end. > > Anyway, since Python already allows trailing commas, I see no need to > add leading ones. Which is a feature I've never seen in any language, > either. And it would make it slightly easier to leave off the first > parameter. > > Eric > > _______________________________________________ > 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/R6AU26PL4QK5LFMW25PP2VUVLFSTDGX6/ > Code of Conduct: http://python.org/psf/codeofconduct/
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