[Python-ideas] Adding str.isascii() ?
steve at pearwood.info
Fri Jan 26 20:27:18 EST 2018
On Fri, Jan 26, 2018 at 02:37:14PM +0100, Victor Stinner wrote:
> 2018-01-26 13:39 GMT+01:00 Steven D'Aprano <steve at pearwood.info>:
> > I have no objection to isascii, but I don't think it goes far enough.
> > Sometimes I want to know whether a string is compatible with Latin-1 or
> > UCS-2 as well as ASCII. For that, I used a function that exposes the
> > size of code points in bits:
> Really? I never required such check in practice. Would you mind to
> elaborate your use case?
Dealing with the Supplementary Unicode Planes have the same problems
that older "narrow" builds of Python sufferred from: single code points
were counted as len(2) instead of len(1), slicing could be wrong, etc.
There are still many applications which assume Latin-1 data. For
instance, I use a media player which displays mojibake when passed
anything outside of Latin-1.
Sometimes it is useful to know in advance when text you pass to another
application is going to run into problems because of the other
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