[issue29809] TypeError in traceback.print_exc - unicode does not have the buffer interface

[STINNER Victor]

STINNER Victor added the comment:

sys.stderr.write() accepts Unicode (encoded to sys.stderr.encoding), whereas io.BytesIO.write() requires bytes:

>>> import sys; sys.stderr.write(u'\xe9\n')
é

>>> import io; io.BytesIO().write(u'\xe9\n')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'unicode' does not have the buffer interface


You should write an helper function (class with a write method) encoding Unicode strings.


> The same test runs without error on Python 3.

Yeah, it's now time to upgrade to Python 3 ;-)

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<http://bugs.python.org/issue29809>
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