add unescape method to xml.sax.saxutils

[mboedick]

BPO	613256
Nosy	@loewis
Files	saxutils_escape_patch: patch to add unescape method to xml.sax.saxutils saxutils.diff: add unescape() method for saxutils

^{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 = 'https://github.com/loewis'
closed_at = <Date 2002-10-26.14:52:19.000>
created_at = <Date 2002-09-23.15:47:16.000>
labels = ['expert-XML']
title = 'add unescape method to xml.sax.saxutils'
updated_at = <Date 2002-10-26.14:52:19.000>
user = 'https://bugs.python.org/mboedick'

bugs.python.org fields:

activity = <Date 2002-10-26.14:52:19.000>
actor = 'loewis'
assignee = 'loewis'
closed = True
closed_date = None
closer = None
components = ['XML']
creation = <Date 2002-09-23.15:47:16.000>
creator = 'mboedick'
dependencies = []
files = ['4584', '4585']
hgrepos = []
issue_num = 613256
keywords = ['patch']
message_count = 4.0
messages = ['41210', '41211', '41212', '41213']
nosy_count = 2.0
nosy_names = ['loewis', 'mboedick']
pr_nums = []
priority = 'normal'
resolution = 'accepted'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue613256'
versions = ['Python 2.3']

[mboedick]

This patch adds an unescape() method to saxutils to
convert an xml-escaped string back to its original form

It also modifies the escape() method so that the core
escaping takes places after any additional escaping
passed in via the dictionary. This will guarantee that
returned string is properly escaped for xml no matter
what is passed in via the dictionary.

[loewis]

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Can you please provide documentation and test cases?

[mboedick]

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user_id=119895

added documentation and test cases

no longer changes the order in which escape() modifies the
string with core and passed-in replacements

[loewis]

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user_id=21627

Thanks for the patch, committed as

xmlsaxutils.tex 1.4;
test_sax.py 1.23;
output/test_sax 1.11;
saxutils.py 1.17;
ACKS 1.213;
NEWS 1.504;