Unicode xmlcharrefreplace produces backslash not xml style.

[odontomatix]

BPO	1674223
Nosy	@doerwalter

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2007-03-05.17:54:51.000>
created_at = <Date 2007-03-05.17:11:09.000>
labels = ['invalid']
title = 'Unicode xmlcharrefreplace produces backslash not xml style.'
updated_at = <Date 2007-03-05.17:54:51.000>
user = 'https://bugs.python.org/odontomatix'

bugs.python.org fields:

activity = <Date 2007-03-05.17:54:51.000>
actor = 'doerwalter'
assignee = 'none'
closed = True
closed_date = None
closer = None
components = ['None']
creation = <Date 2007-03-05.17:11:09.000>
creator = 'odontomatix'
dependencies = []
files = []
hgrepos = []
issue_num = 1674223
keywords = []
message_count = 2.0
messages = ['31431', '31432']
nosy_count = 2.0
nosy_names = ['doerwalter', 'odontomatix']
pr_nums = []
priority = 'normal'
resolution = 'not a bug'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue1674223'
versions = ['Python 2.5']

[odontomatix]

In Python 2.4.2 and 2.5, and maybe other versions too, the unicode string encoder for producing xml style unicode output (example, © for copyright symbol) produces the wrong style -- it produces backslash encoding (\xa9 for same copyright unicode character).

Example at Python shell:
u'\u2122'.encode('unicode_escape','xmlcharrefreplace')
should produce: ™
but it produces \u2122

The same happens when it is used in a program. The print output of the encoded unicode contains backslash encodings as though the method 'backslashreplace' had been used.

[doerwalter]

u'\u2122'.encode('unicode_escape','xmlcharrefreplace') produces \u2122 because that's the way the unicode_escape codec outputs unicode codepoints. For unicode_escape the xmlcharrefreplace error handler never kicks in. If you want the error handler to kick in, you have to use an encoding that doesn't support the character you want to encode. The best candidate is probably ascii:

>> u"\u2122".encode("ascii", "xmlcharrefreplace")
>> '"'