I've never used compress() either. But I probably HAVE selected only the "truthy" elements of an iterable. The obvious way to do that is:
it = (x for x in it if x) It feels like changing compress() would just be more obscure, but not add to clarity. On Mon, Sep 13, 2021, 5:07 PM Rob Cliffe via Python-ideas < python-ideas@python.org> wrote: > My 2c: > I don't remember ever seeing itertools.compress (although I've > occasionally browsed through itertools), and I've certainly never used > it. However, having worked out what it does, my first reaction was that > this would be a harmless and mildly convenient change. But might it not > lead to bugs if the second argument were accidentally omitted? > Best wishes > Rob Cliffe > > On 13/09/2021 12:07, m...@dyatkovskiy.com wrote: > > Hi! > > > > I propose to enhance "itertools.compress" in such a way so if you don't > provide selectors, then "data" itself is used as a selectors. > > So "compress(a)" would be equivalent to "compress(a, a)" > > > > For example: > > > >>>> from itertools import compress > > > >>>> [*compress([0, 1, 2, 3]))] > > [1, 2, 3] > > > >>>> [*compress(["", "CFLAGS=-O3"])] > > ["CFLAGS=-O3"] > > > >>>> opts = compress([None, "", "-filove-python", "CFLAGS=-O3"]) > >>>> " ".join(opts) > > '-filove-python CFLAGS=-O3' > > > > What do you think guys about this? Perhaps it was proposed by someone > else? > > > > Thanks! > > Stepan Dyatkovskiy > > _______________________________________________ > > 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/LVD63OEWRTTU542NKFODLERXCM7LEQ5D/ > > Code of Conduct: http://python.org/psf/codeofconduct/ > > _______________________________________________ > 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/433A57HX3XICLCX2TT4M3G5AL34OWOA2/ > Code of Conduct: http://python.org/psf/codeofconduct/ >
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