ElementTree排序问题

最新推荐文章于 2024-01-24 10:48:22 发布

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最新推荐文章于 2024-01-24 10:48:22 发布

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本文介绍如何通过修改ElementTree源代码来禁用XML属性的默认排序行为，包括去除属性排序及基于命名空间的排序。

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http://stackoverflow.com/questions/14257978/elementtree-setting-attribute-order

Apply monkey patch as mentioned below::
in ElementTree.py file, there is a functionnamed as _serialize_xml;
in this function; apply the below mentioned patch;

##for k, v in sorted(items): # remove the sorted here

for k, v in items:

if isinstance(k, QName):

k = k.text

if isinstance(v, QName):

v = qnames[v.text]

else:

v = _escape_attrib(v, encoding)

write(" %s=\"%s\"" % (qnames[k], v))

here; remove the sorted(items) andmake it just items like i have doneabove.

Also to disable sorting based on namespace(because in above patch; sorting isstill present when namespace is present for xml attribute; otherwise ifnamespace is not present; then above is working fine); so to do that, replaceall {} with collections.OrderedDict() from ElementTree.py

0a1,52
> #
> # ElementTree
> # $Id: ElementTree.py 3440 2008-07-18 14:45:01Z fredrik $
> #
> # light-weight XML support for Python 2.3 and later.
> #
> # history (since 1.2.6):
> # 2005-11-12 fl   added tostringlist/fromstringlist helpers
> # 2006-07-05 fl   merged in selected changes from the 1.3 sandbox
> # 2006-07-05 fl   removed support for 2.1 and earlier
> # 2007-06-21 fl   added deprecation/future warnings
> # 2007-08-25 fl   added doctype hook, added parser version attribute etc
> # 2007-08-26 fl   added new serializer code (better namespace handling, etc)
> # 2007-08-27 fl   warn for broken /tag searches on tree level
> # 2007-09-02 fl   added html/text methods to serializer (experimental)
> # 2007-09-05 fl   added method argument to tostring/tostringlist
> # 2007-09-06 fl   improved error handling
> # 2007-09-13 fl   added itertext, iterfind; assorted cleanups
> # 2007-12-15 fl   added C14N hooks, copy method (experimental)
> #
> # Copyright (c) 1999-2008 by Fredrik Lundh.  All rights reserved.
> #
> # fredrik@pythonware.com
> # http://www.pythonware.com
> #
> # --------------------------------------------------------------------
> # The ElementTree toolkit is
> #
> # Copyright (c) 1999-2008 by Fredrik Lundh
> #
> # By obtaining, using, and/or copying this software and/or its
> # associated documentation, you agree that you have read, understood,
> # and will comply with the following terms and conditions:
> #
> # Permission to use, copy, modify, and distribute this software and
> # its associated documentation for any purpose and without fee is
> # hereby granted, provided that the above copyright notice appears in
> # all copies, and that both that copyright notice and this permission
> # notice appear in supporting documentation, and that the name of
> # Secret Labs AB or the author not be used in advertising or publicity
> # pertaining to distribution of the software without specific, written
> # prior permission.
> #
> # SECRET LABS AB AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
> # TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANT-
> # ABILITY AND FITNESS.  IN NO EVENT SHALL SECRET LABS AB OR THE AUTHOR
> # BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
> # DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
> # WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
> # ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
> # OF THIS SOFTWARE.
> # --------------------------------------------------------------------
2c54,55
< import collections
---
> # Licensed to PSF under a Contributor Agreement.
> # See http://www.python.org/psf/license for licensing details.
74c127
<     import ElementPath
---
>     from . import ElementPath
154c207
<     def __init__(self, tag, attrib=collections.OrderedDict(), **extra):
---
>     def __init__(self, tag, attrib={}, **extra):
474c527
< def SubElement(parent, tag, attrib=collections.OrderedDict(), **extra):
---
> def SubElement(parent, tag, attrib={}, **extra):
785c838
<     namespaces = collections.OrderedDict()
---
>     namespaces = {}
865c918,919
<                     for v, k in (namespaces.items()):  # sort on prefix
---
>                     for v, k in sorted(namespaces.items(),
>                                        key=lambda x: x[1]):  # sort on prefix
872c926
<                 for k, v in items:  # lexical order
---
>                 for k, v in sorted(items):  # lexical order
1264c1318
<     ids = collections.OrderedDict()
---
>     ids = {}
1420c1474
<         self._names = collections.OrderedDict() # name memo cache
---
>         self._names = {} # name memo cache
1442c1496
<         self.entity = collections.OrderedDict()
---
>         self.entity = {}
1476c1530
<         attrib = collections.OrderedDict()
---
>         attrib = {}
1485c1539
<         attrib = collections.OrderedDict()
---
>         attrib = {}