Thanks very much. This is the elegant kind of solution I was looking for. I
had hoped there was a way to do it without even addressing the matter of
surrogates, but apparently not. The reason I don't like this is that it
depends on knowing that python internally stores strings in UTF-16. I expected
that there would be some built-in iterator that would return the code points.
(Actually, this all started when I realized that s[k] wouldn't necessarily give
me the kth character of the string s.)
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