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Date: Thu, 16 Jan 2014 13:34:08 +0100
From: Ernest =?iso-8859-1?Q?Adrogu=E9?= <nfdisco@gmail.com>
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Subject: Unicode strings as arguments to exceptions
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Xref: csiph.com comp.lang.python:64077

Hi,

There seems to be some inconsistency in the way exceptions handle Unicode
strings.  For instance, KeyError seems to not have a problem with them

>>> raise KeyError('a')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
KeyError: 'a'
>>> raise KeyError(u'=E4')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
KeyError: u'\xe4'

On the other hand ValueError doesn't print anything.

>>> raise ValueError('a')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: a
>>> raise ValueError(u'=E4')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError

I'm using Python 2.7.6 on a Unix machine.