[issue17629] Expose string width to Python

[Ezio Melotti]

Ezio Melotti added the comment:

max(map(ord, s)) or your str_width(s) are not much more complicated than s.width(), just slower, so it's just a problem of performance.

len() is a much more common operation so it makes sense to have a fast built-in function.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17629>
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