On 27 October 2016 at 00:17, Chris Barker <chris.bar...@noaa.gov> wrote: > I"ve lost track of what (If anything) is actually being proposed here... so > I"m going to try a quick summary: > > > 1) an easy way to spell "remove all the characters other than these" > > I think that's a good idea. What with unicode having an enormous number of > code points, it really does make sense to have a way to specify only what > you want, rather than what you don't want. > > Back in the good old days of 1-byte chars, it wasn't hard to build up a full > 256 element translate table -- not so much anymore. And one of the whole > points of str.translate() is good performance. > > a) a new method: > > str.remove_all_but(sequence_of_chars) > (naming TBD) > > b) a new flag in translate (Kind of like the decode keywords) > > str.translate(table, missing='ignore'|'remove') > > > (b) has the advantage of adding translation and removal in one fell swoop -- > but if you only want to remove, then you have to make a translation table of > 1:1 mappings = not hard, but a annoying:
Exactly that is the proposal. And for same exact reason that you point out, I also can't give a comment what would be better. It would be indeed quite strange from syntactical POV if I just want to remove "all except" and must call translate(). So ideally both should exist I think. Mikhail _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
