Simon Cross <[EMAIL PROTECTED]> added the comment: One of the examples Christoph tried was
unicode(Exception(u'\xe1')) which fails quite oddly with: UnicodeEncodeError: 'ascii' codec can't encode character u'\xe1' in position 0: ordinal not in range(128) The reason for this is Exception lacks an __unicode__ method implementation so that unicode(e) does something like unicode(str(e)) which attempts to convert the exception arguments to the default encoding (almost always ASCII) and fails. Fixing this seems quite important. It's common to want to raise errors with non-ASCII characters (e.g. when the data which caused the error contains such characters). Usually the code raising the error has no way of knowing how the characters should be encoded (exceptions can end up being written to log files, displayed in web interfaces, that sort of thing). This means raising exceptions with unicode messages. Using unicode(e.message) is unattractive since it won't work in 3.0 and also does not duplicate str(e)'s handling of the other exception __init__ arguments. I'm attaching a patch which implements __unicode__ for BaseException. Because of the lack of a tp_unicode slot to mirror tp_str slot, this breaks the test that calls unicode(Exception). The existing test for unicode(e) does unicode(Exception(u"Foo")) which is a bit of a non-test. My patch adds a test of unicode(Exception(u'\xe1')) which fails without the patch. A quick look through trunk suggests implementing tp_unicode actually wouldn't be a huge job. My worry is that this would constitute a change to the C API for PyObjects and has little chance of acceptance into 2.6 (and in 3.0 all these issues disappear anyway). If there is some chance of acceptance, I'm willing to write a patch that adds tp_unicode. ---------- nosy: +hodgestar Added file: http://bugs.python.org/file10559/exception-unicode.diff _______________________________________ Python tracker <[EMAIL PROTECTED]> <http://bugs.python.org/issue2517> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
