Chris Angelico added the comment:

And of course, I make a copy/paste error in a trivial piece of example code.

def str_width(s):
  width=1
  for ch in map(ord,s):
    if ch > 0xFFFF: return 4
    if ch > 0xFF: width=2
  return width

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue17629>
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