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annotate venv/lib/python2.7/site-packages/docutils/writers/docutils_xml.py @ 0:d67268158946 draft

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planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
author bcclaywell
date Mon, 12 Oct 2015 17:43:33 -0400
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1 # $Id: docutils_xml.py 7497 2012-08-16 15:17:29Z milde $
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2 # Author: David Goodger, Paul Tremblay, Guenter Milde
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3 # Maintainer: docutils-develop@lists.sourceforge.net
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4 # Copyright: This module has been placed in the public domain.
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5
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6 """
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7 Simple document tree Writer, writes Docutils XML according to
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8 http://docutils.sourceforge.net/docs/ref/docutils.dtd.
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9 """
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10
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11 __docformat__ = 'reStructuredText'
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12
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13 import sys
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14
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15 # Work around broken PyXML and obsolete python stdlib behaviour. (The stdlib
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16 # replaces its own xml module with PyXML if the latter is installed. However,
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17 # PyXML is no longer maintained and partially incompatible/buggy.) Reverse
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18 # the order in which xml module and submodules are searched to import stdlib
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19 # modules if they exist and PyXML modules if they do not exist in the stdlib.
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20 #
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21 # See http://sourceforge.net/tracker/index.php?func=detail&aid=3552403&group_id=38414&atid=422030
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22 # and http://lists.fedoraproject.org/pipermail/python-devel/2012-July/000406.html
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23 import xml
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24 if "_xmlplus" in xml.__path__[0]: # PyXML sub-module
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25 xml.__path__.reverse() # If both are available, prefer stdlib over PyXML
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26
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27 import xml.sax.saxutils
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28 from StringIO import StringIO
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29
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30 import docutils
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31 from docutils import frontend, writers, nodes
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32
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33
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34 class RawXmlError(docutils.ApplicationError): pass
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35
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36
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37 class Writer(writers.Writer):
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38
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39 supported = ('xml',)
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40 """Formats this writer supports."""
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41
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42 settings_spec = (
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43 '"Docutils XML" Writer Options',
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44 None,
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45 (('Generate XML with newlines before and after tags.',
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46 ['--newlines'],
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47 {'action': 'store_true', 'validator': frontend.validate_boolean}),
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48 ('Generate XML with indents and newlines.',
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49 ['--indents'],
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50 {'action': 'store_true', 'validator': frontend.validate_boolean}),
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51 ('Omit the XML declaration. Use with caution.',
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52 ['--no-xml-declaration'],
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53 {'dest': 'xml_declaration', 'default': 1, 'action': 'store_false',
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54 'validator': frontend.validate_boolean}),
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55 ('Omit the DOCTYPE declaration.',
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56 ['--no-doctype'],
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57 {'dest': 'doctype_declaration', 'default': 1,
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58 'action': 'store_false', 'validator': frontend.validate_boolean}),))
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59
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60 settings_defaults = {'output_encoding_error_handler': 'xmlcharrefreplace'}
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61
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62 config_section = 'docutils_xml writer'
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63 config_section_dependencies = ('writers',)
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64
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65 output = None
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66 """Final translated form of `document`."""
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67
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68 def __init__(self):
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69 writers.Writer.__init__(self)
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70 self.translator_class = XMLTranslator
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71
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72 def translate(self):
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73 self.visitor = visitor = self.translator_class(self.document)
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74 self.document.walkabout(visitor)
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75 self.output = ''.join(visitor.output)
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76
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77
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78 class XMLTranslator(nodes.GenericNodeVisitor):
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79
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80 xml_declaration = '<?xml version="1.0" encoding="%s"?>\n'
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81 # TODO: add stylesheet options similar to HTML and LaTeX writers?
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82 #xml_stylesheet = '<?xml-stylesheet type="text/xsl" href="%s"?>\n'
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83 doctype = (
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84 '<!DOCTYPE document PUBLIC'
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85 ' "+//IDN docutils.sourceforge.net//DTD Docutils Generic//EN//XML"'
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86 ' "http://docutils.sourceforge.net/docs/ref/docutils.dtd">\n')
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87 generator = '<!-- Generated by Docutils %s -->\n'
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88
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89 xmlparser = xml.sax.make_parser()
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90 """SAX parser instance to check/exctract raw XML."""
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91 xmlparser.setFeature(
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92 "http://xml.org/sax/features/external-general-entities", True)
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93
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94 def __init__(self, document):
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95 nodes.NodeVisitor.__init__(self, document)
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96
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97 # Reporter
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98 self.warn = self.document.reporter.warning
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99 self.error = self.document.reporter.error
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100
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101 # Settings
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102 self.settings = settings = document.settings
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103 self.indent = self.newline = ''
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104 if settings.newlines:
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105 self.newline = '\n'
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106 if settings.indents:
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107 self.newline = '\n'
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108 self.indent = ' '
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109 self.level = 0 # indentation level
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110 self.in_simple = 0 # level of nesting inside mixed-content elements
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111
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112 # Output
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113 self.output = []
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114 if settings.xml_declaration:
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115 self.output.append(
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116 self.xml_declaration % settings.output_encoding)
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117 if settings.doctype_declaration:
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118 self.output.append(self.doctype)
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119 self.output.append(self.generator % docutils.__version__)
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120
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121 # initialize XML parser
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122 self.the_handle=TestXml()
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123 self.xmlparser.setContentHandler(self.the_handle)
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124
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125 # generic visit and depart methods
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126 # --------------------------------
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127
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128 def default_visit(self, node):
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129 """Default node visit method."""
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130 if not self.in_simple:
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131 self.output.append(self.indent*self.level)
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132 self.output.append(node.starttag(xml.sax.saxutils.quoteattr))
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133 self.level += 1
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134 if isinstance(node, nodes.TextElement):
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135 self.in_simple += 1
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136 if not self.in_simple:
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137 self.output.append(self.newline)
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138
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139 def default_departure(self, node):
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140 """Default node depart method."""
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141 self.level -= 1
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142 if not self.in_simple:
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143 self.output.append(self.indent*self.level)
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144 self.output.append(node.endtag())
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145 if isinstance(node, nodes.TextElement):
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146 self.in_simple -= 1
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147 if not self.in_simple:
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148 self.output.append(self.newline)
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149
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150
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151 # specific visit and depart methods
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152 # ---------------------------------
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153
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154 def visit_Text(self, node):
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155 text = xml.sax.saxutils.escape(node.astext())
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156 self.output.append(text)
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157
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158 def depart_Text(self, node):
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159 pass
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160
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161 def visit_raw(self, node):
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162 if 'xml' not in node.get('format', '').split():
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163 # skip other raw content?
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164 # raise nodes.SkipNode
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165 self.default_visit(node)
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166 return
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167 # wrap in <raw> element
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168 self.default_visit(node) # or not?
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169 xml_string = node.astext()
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170 self.output.append(xml_string)
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171 self.default_departure(node) # or not?
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172 # Check validity of raw XML:
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173 if isinstance(xml_string, unicode) and sys.version_info < (3,):
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174 xml_string = xml_string.encode('utf8')
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175 try:
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176 self.xmlparser.parse(StringIO(xml_string))
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177 except xml.sax._exceptions.SAXParseException, error:
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178 col_num = self.the_handle.locator.getColumnNumber()
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179 line_num = self.the_handle.locator.getLineNumber()
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180 srcline = node.line
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181 if not isinstance(node.parent, nodes.TextElement):
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182 srcline += 2 # directive content start line
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183 msg = 'Invalid raw XML in column %d, line offset %d:\n%s' % (
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184 col_num, line_num, node.astext())
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185 self.warn(msg, source=node.source, line=srcline+line_num-1)
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186 raise nodes.SkipNode # content already processed
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187
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188
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189 class TestXml(xml.sax.ContentHandler):
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190
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191 def setDocumentLocator(self, locator):
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192 self.locator = locator