I don't know if this is a module bug or a documentation bug.  I'm
using the documentation from the manual on python.org.

>>> x = TextWrapper()
>>> x.wrap(u'abcd')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/local/lib/python2.3/textwrap.py", line 239, in wrap
    text = self._munge_whitespace(text)
  File "/usr/local/lib/python2.3/textwrap.py", line 99, in _munge_whitespace
    text = text.translate(self.whitespace_trans)
TypeError: character mapping must return integer, None or unicode

If you do x.replace_whitespace = True, then it will wrap the text.

So either whitespace replacement needs to be fixed, or the docs
need to be updated to note that you have to set replace_whitespace
to false if you want to wrap unicode.

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Greg, can you take a look?

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I'm almost competely ignorant of Unicode, and so is textwrap.py.  
I'll try to get help on python-dev to fix this, or figure it out myself.  
Failing that, the inability to handle Unicode should be documented.

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Hopefully fixed in rev 1.19 of textwrap.py.  Not in test
suite yet, so I'm leaving this one "pending".

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OK, tested in rev 1.18 of test/test_textwrap.py.