On 02/12/2013 21:14, Ned Batchelder wrote:
On 12/2/13 3:38 PM, Ethan Furman wrote:
On 11/29/2013 04:44 PM, Steven D'Aprano wrote:
Out of the nine tests, Python 3.3 passes six, with three tests being
failures or dubious. If you believe that the native string type should
operate on code-points, then you'll think that Python does the right
thing.
I think Python is doing it correctly. If I want to operate on
"clusters" I'll normalize the string first.
Thanks for this excellent post.
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~Ethan~
This is where my knowledge about Unicode gets fuzzy. Isn't it the case
that some grapheme clusters (or whatever the right word is) can't be
normalized down to a single code point? Characters can accept many
accents, for example. In that case, you can't always normalize and use
the existing string methods, but would need more specialized code.
A better way of saying it is that there are codepoints for some grapheme
clusters. Those 'precomposed' codepoints exist because some legacy
character sets contained them, and having a one-to-one mapping
encouraged Unicode's adoption.
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