2 Copyright 2008 Free Software Foundation, Inc.
3 This file is part of GNU Radio
5 GNU Radio Companion is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public License
7 as published by the Free Software Foundation; either version 2
8 of the License, or (at your option) any later version.
10 GNU Radio Companion is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
20 from lxml import etree
21 from .. utils import odict
23 XMLSyntaxError = etree.XMLSyntaxError
25 def validate_dtd(xml_file, dtd_file=None):
27 Validate an xml file against its dtd.
28 @param xml_file the xml file
29 @param dtd_file the optional dtd file
30 @throws Exception validation fails
33 dtd = etree.DTD(dtd_file)
34 xml = etree.parse(xml_file)
35 if not dtd.validate(xml.getroot()):
36 raise XMLSyntaxError, '\n'.join(map(str, dtd.error_log.filter_from_errors()))
38 parser = etree.XMLParser(dtd_validation=True)
39 xml = etree.parse(xml_file, parser=parser)
41 raise XMLSyntaxError, '\n'.join(map(str, parser.error_log.filter_from_errors()))
43 def from_file(xml_file):
45 Create nested data from an xml file using the from xml helper.
46 @param xml_file the xml file path
47 @return the nested data
49 xml = etree.parse(xml_file).getroot()
50 return _from_file(xml)
54 Recursivly parse the xml tree into nested data format.
55 @param xml the xml tree
56 @return the nested data
60 return odict({tag: xml.text or ''}) #store empty tags (text is None) as empty string
63 key, value = _from_file(elem).items()[0]
64 if nested_data.has_key(key): nested_data[key].append(value)
65 else: nested_data[key] = [value]
66 #delistify if the length of values is 1
67 for key, values in nested_data.iteritems():
68 if len(values) == 1: nested_data[key] = values[0]
69 return odict({tag: nested_data})
71 def to_file(nested_data, xml_file):
73 Write an xml file and use the to xml helper method to load it.
74 @param nested_data the nested data
75 @param xml_file the xml file path
77 xml = _to_file(nested_data)[0]
78 open(xml_file, 'w').write(etree.tostring(xml, xml_declaration=True, pretty_print=True))
80 def _to_file(nested_data):
82 Recursivly parse the nested data into xml tree format.
83 @param nested_data the nested data
84 @return the xml tree filled with child nodes
87 for key, values in nested_data.iteritems():
88 #listify the values if not a list
89 if not isinstance(values, (list, set, tuple)):
92 node = etree.Element(key)
93 if isinstance(value, (str, unicode)): node.text = value
94 else: node.extend(_to_file(value))
98 if __name__ == '__main__':
99 """Use the main method to test parse xml's functions."""