For what its worth, I find the proposed syntax confusing and difficult to read. Conceptually it makes sense, but using existing set operations seems like a far more readable way to handle this case.
On Tue, Dec 31, 2019 at 11:03 AM Richard Damon <rich...@damon-family.org> wrote: > On 12/31/19 1:20 AM, iman.h.a.kha...@gmail.com wrote: > > Hi > > I think the following syntax's: > > > > if foo in foobar or bar in foobar or baz in foobar: > > pass > > if foo in foobar and bar in foobar and baz in foobar: > > pass > > > > can be more readable and shorter if written as: > > > > if foo or bar or baz in foobar: > > pass > > if foo and bar and baz in foobar: > > pass > > > > maybe for "is" instead of: > > > > if foobar is foo or foobar is bar or foobar is baz: > > pass > > > > if foobar is foo or bar or baz: > > pass > > > > now the recommended syntax translate to this: (I think so) > > > > if foo (IS NOT '0' or None or empty) or bar (IS NOT '0' or None or > empty) or baz in foobar > > > > so probably we must introduce a new type of 'or' (I recommend the > CAPITAL "OR","AND") so this: > > > > if foo OR bar OR baz in foobar: > > pass > > > > translates to this: > > > > if foo in foobar or bar in foobar or baz in foobar: > > pass > > IF I were to change the syntax ( which I don't propose), I believe the > construct like foo or bar or baz in foobar to give you issues parsing. > An alternative which is, in my opinion, more readable would be if > any(foo, bar, baz) in foobar (and the alternative if all(foo, bar, baz) > in foobar). To do this any and all could make a specially tagged tupl > which interacts with operators like 'in' in a special way where it > applies each of its members and or/ands the results. > > It may even be possible to do this with the existing Python by defining > a suitable class any and all with an appropriate constructor and > implementing its own version of things like in. (not sure if we can > override 'is') > > -- > Richard Damon > _______________________________________________ > 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/VGN4PW5LV7LMDA3ORP33BYBHJDEFMEGU/ > Code of Conduct: http://python.org/psf/codeofconduct/ > -- -Jon
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