annotate Lib/xml/etree/ElementTree.py @ 78069:a8aa77458e12 3.2

Add c_size_t and c_ssize_t to the ctypes summary table.
author Antoine Pitrou <solipsis@pitrou.net>
date Thu, 12 Jul 2012 20:31:50 +0200
parents 23ffaf975267
children 17c528cff63f 65fc79fb4eb2
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1 #
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2 # ElementTree
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3 # $Id: ElementTree.py 3440 2008-07-18 14:45:01Z fredrik $
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4 #
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5 # light-weight XML support for Python 2.3 and later.
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6 #
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7 # history (since 1.2.6):
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8 # 2005-11-12 fl added tostringlist/fromstringlist helpers
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9 # 2006-07-05 fl merged in selected changes from the 1.3 sandbox
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10 # 2006-07-05 fl removed support for 2.1 and earlier
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11 # 2007-06-21 fl added deprecation/future warnings
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12 # 2007-08-25 fl added doctype hook, added parser version attribute etc
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13 # 2007-08-26 fl added new serializer code (better namespace handling, etc)
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14 # 2007-08-27 fl warn for broken /tag searches on tree level
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15 # 2007-09-02 fl added html/text methods to serializer (experimental)
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16 # 2007-09-05 fl added method argument to tostring/tostringlist
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17 # 2007-09-06 fl improved error handling
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18 # 2007-09-13 fl added itertext, iterfind; assorted cleanups
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19 # 2007-12-15 fl added C14N hooks, copy method (experimental)
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20 #
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21 # Copyright (c) 1999-2008 by Fredrik Lundh. All rights reserved.
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22 #
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23 # fredrik@pythonware.com
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24 # http://www.pythonware.com
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25 #
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26 # --------------------------------------------------------------------
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27 # The ElementTree toolkit is
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28 #
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29 # Copyright (c) 1999-2008 by Fredrik Lundh
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30 #
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31 # By obtaining, using, and/or copying this software and/or its
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32 # associated documentation, you agree that you have read, understood,
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33 # and will comply with the following terms and conditions:
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34 #
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35 # Permission to use, copy, modify, and distribute this software and
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36 # its associated documentation for any purpose and without fee is
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37 # hereby granted, provided that the above copyright notice appears in
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38 # all copies, and that both that copyright notice and this permission
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39 # notice appear in supporting documentation, and that the name of
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40 # Secret Labs AB or the author not be used in advertising or publicity
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41 # pertaining to distribution of the software without specific, written
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42 # prior permission.
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43 #
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44 # SECRET LABS AB AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
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45 # TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANT-
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46 # ABILITY AND FITNESS. IN NO EVENT SHALL SECRET LABS AB OR THE AUTHOR
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47 # BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
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48 # DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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49 # WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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50 # ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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51 # OF THIS SOFTWARE.
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52 # --------------------------------------------------------------------
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53
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54 # Licensed to PSF under a Contributor Agreement.
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55 # See http://www.python.org/psf/license for licensing details.
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56
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57 __all__ = [
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58 # public symbols
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59 "Comment",
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60 "dump",
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61 "Element", "ElementTree",
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62 "fromstring", "fromstringlist",
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63 "iselement", "iterparse",
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64 "parse", "ParseError",
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65 "PI", "ProcessingInstruction",
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66 "QName",
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67 "SubElement",
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68 "tostring", "tostringlist",
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69 "TreeBuilder",
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70 "VERSION",
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71 "XML",
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72 "XMLParser", "XMLTreeBuilder",
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73 ]
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74
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75 VERSION = "1.3.0"
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76
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77 ##
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78 # The <b>Element</b> type is a flexible container object, designed to
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79 # store hierarchical data structures in memory. The type can be
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80 # described as a cross between a list and a dictionary.
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81 # <p>
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82 # Each element has a number of properties associated with it:
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83 # <ul>
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84 # <li>a <i>tag</i>. This is a string identifying what kind of data
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85 # this element represents (the element type, in other words).</li>
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86 # <li>a number of <i>attributes</i>, stored in a Python dictionary.</li>
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87 # <li>a <i>text</i> string.</li>
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88 # <li>an optional <i>tail</i> string.</li>
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89 # <li>a number of <i>child elements</i>, stored in a Python sequence</li>
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90 # </ul>
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91 #
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92 # To create an element instance, use the {@link #Element} constructor
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93 # or the {@link #SubElement} factory function.
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94 # <p>
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95 # The {@link #ElementTree} class can be used to wrap an element
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96 # structure, and convert it from and to XML.
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97 ##
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98
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99 import sys
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100 import re
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101 import warnings
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102
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103
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104 class _SimpleElementPath:
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105 # emulate pre-1.2 find/findtext/findall behaviour
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106 def find(self, element, tag, namespaces=None):
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107 for elem in element:
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108 if elem.tag == tag:
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109 return elem
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110 return None
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111 def findtext(self, element, tag, default=None, namespaces=None):
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112 elem = self.find(element, tag)
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113 if elem is None:
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114 return default
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115 return elem.text or ""
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116 def iterfind(self, element, tag, namespaces=None):
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117 if tag[:3] == ".//":
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118 for elem in element.iter(tag[3:]):
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119 yield elem
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120 for elem in element:
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121 if elem.tag == tag:
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122 yield elem
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123 def findall(self, element, tag, namespaces=None):
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124 return list(self.iterfind(element, tag, namespaces))
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125
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126 try:
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127 from . import ElementPath
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128 except ImportError:
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129 ElementPath = _SimpleElementPath()
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130
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131 ##
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132 # Parser error. This is a subclass of <b>SyntaxError</b>.
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133 # <p>
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134 # In addition to the exception value, an exception instance contains a
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135 # specific exception code in the <b>code</b> attribute, and the line and
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136 # column of the error in the <b>position</b> attribute.
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137
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138 class ParseError(SyntaxError):
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139 pass
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140
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141 # --------------------------------------------------------------------
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142
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143 ##
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144 # Checks if an object appears to be a valid element object.
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145 #
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146 # @param An element instance.
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147 # @return A true value if this is an element object.
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148 # @defreturn flag
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149
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150 def iselement(element):
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151 # FIXME: not sure about this; might be a better idea to look
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152 # for tag/attrib/text attributes
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153 return isinstance(element, Element) or hasattr(element, "tag")
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154
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155 ##
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156 # Element class. This class defines the Element interface, and
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157 # provides a reference implementation of this interface.
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158 # <p>
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159 # The element name, attribute names, and attribute values can be
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160 # either ASCII strings (ordinary Python strings containing only 7-bit
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161 # ASCII characters) or Unicode strings.
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162 #
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163 # @param tag The element name.
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164 # @param attrib An optional dictionary, containing element attributes.
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165 # @param **extra Additional attributes, given as keyword arguments.
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166 # @see Element
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167 # @see SubElement
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168 # @see Comment
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169 # @see ProcessingInstruction
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170
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171 class Element:
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172 # <tag attrib>text<child/>...</tag>tail
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173
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174 ##
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175 # (Attribute) Element tag.
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176
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177 tag = None
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178
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179 ##
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180 # (Attribute) Element attribute dictionary. Where possible, use
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181 # {@link #Element.get},
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182 # {@link #Element.set},
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183 # {@link #Element.keys}, and
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184 # {@link #Element.items} to access
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185 # element attributes.
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186
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187 attrib = None
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188
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189 ##
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190 # (Attribute) Text before first subelement. This is either a
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191 # string or the value None. Note that if there was no text, this
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192 # attribute may be either None or an empty string, depending on
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193 # the parser.
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194
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195 text = None
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196
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197 ##
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198 # (Attribute) Text after this element's end tag, but before the
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199 # next sibling element's start tag. This is either a string or
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200 # the value None. Note that if there was no text, this attribute
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201 # may be either None or an empty string, depending on the parser.
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202
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203 tail = None # text after end tag, if any
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204
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205 # constructor
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206
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207 def __init__(self, tag, attrib={}, **extra):
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208 attrib = attrib.copy()
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209 attrib.update(extra)
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210 self.tag = tag
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211 self.attrib = attrib
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212 self._children = []
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213
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214 def __repr__(self):
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215 return "<Element %s at 0x%x>" % (repr(self.tag), id(self))
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216
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217 ##
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218 # Creates a new element object of the same type as this element.
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219 #
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220 # @param tag Element tag.
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221 # @param attrib Element attributes, given as a dictionary.
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222 # @return A new element instance.
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223
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224 def makeelement(self, tag, attrib):
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225 return self.__class__(tag, attrib)
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226
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227 ##
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228 # (Experimental) Copies the current element. This creates a
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229 # shallow copy; subelements will be shared with the original tree.
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230 #
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231 # @return A new element instance.
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232
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233 def copy(self):
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234 elem = self.makeelement(self.tag, self.attrib)
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235 elem.text = self.text
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236 elem.tail = self.tail
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237 elem[:] = self
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238 return elem
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239
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240 ##
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241 # Returns the number of subelements. Note that this only counts
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242 # full elements; to check if there's any content in an element, you
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243 # have to check both the length and the <b>text</b> attribute.
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244 #
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245 # @return The number of subelements.
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246
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247 def __len__(self):
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248 return len(self._children)
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249
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250 def __bool__(self):
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251 warnings.warn(
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252 "The behavior of this method will change in future versions. "
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253 "Use specific 'len(elem)' or 'elem is not None' test instead.",
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254 FutureWarning, stacklevel=2
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255 )
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256 return len(self._children) != 0 # emulate old behaviour, for now
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257
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258 ##
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259 # Returns the given subelement, by index.
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260 #
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261 # @param index What subelement to return.
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262 # @return The given subelement.
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263 # @exception IndexError If the given element does not exist.
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264
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265 def __getitem__(self, index):
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266 return self._children[index]
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267
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268 ##
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269 # Replaces the given subelement, by index.
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270 #
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271 # @param index What subelement to replace.
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272 # @param element The new element value.
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273 # @exception IndexError If the given element does not exist.
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274
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275 def __setitem__(self, index, element):
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276 # if isinstance(index, slice):
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277 # for elt in element:
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278 # assert iselement(elt)
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279 # else:
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280 # assert iselement(element)
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281 self._children[index] = element
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282
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283 ##
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284 # Deletes the given subelement, by index.
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285 #
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286 # @param index What subelement to delete.
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287 # @exception IndexError If the given element does not exist.
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288
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289 def __delitem__(self, index):
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290 del self._children[index]
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291
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292 ##
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293 # Adds a subelement to the end of this element. In document order,
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294 # the new element will appear after the last existing subelement (or
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295 # directly after the text, if it's the first subelement), but before
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296 # the end tag for this element.
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297 #
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298 # @param element The element to add.
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299
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300 def append(self, element):
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301 # assert iselement(element)
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302 self._children.append(element)
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303
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304 ##
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305 # Appends subelements from a sequence.
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306 #
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307 # @param elements A sequence object with zero or more elements.
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308 # @since 1.3
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309
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310 def extend(self, elements):
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311 # for element in elements:
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312 # assert iselement(element)
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313 self._children.extend(elements)
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314
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315 ##
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316 # Inserts a subelement at the given position in this element.
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317 #
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318 # @param index Where to insert the new subelement.
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319
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320 def insert(self, index, element):
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321 # assert iselement(element)
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322 self._children.insert(index, element)
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323
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324 ##
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325 # Removes a matching subelement. Unlike the <b>find</b> methods,
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326 # this method compares elements based on identity, not on tag
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327 # value or contents. To remove subelements by other means, the
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328 # easiest way is often to use a list comprehension to select what
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329 # elements to keep, and use slice assignment to update the parent
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330 # element.
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331 #
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332 # @param element What element to remove.
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333 # @exception ValueError If a matching element could not be found.
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334
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335 def remove(self, element):
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336 # assert iselement(element)
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337 self._children.remove(element)
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338
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339 ##
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340 # (Deprecated) Returns all subelements. The elements are returned
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341 # in document order.
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342 #
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343 # @return A list of subelements.
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344 # @defreturn list of Element instances
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345
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346 def getchildren(self):
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347 warnings.warn(
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348 "This method will be removed in future versions. "
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349 "Use 'list(elem)' or iteration over elem instead.",
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350 DeprecationWarning, stacklevel=2
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351 )
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352 return self._children
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353
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354 ##
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355 # Finds the first matching subelement, by tag name or path.
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356 #
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357 # @param path What element to look for.
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358 # @keyparam namespaces Optional namespace prefix map.
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359 # @return The first matching element, or None if no element was found.
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360 # @defreturn Element or None
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361
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362 def find(self, path, namespaces=None):
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363 return ElementPath.find(self, path, namespaces)
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364
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365 ##
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366 # Finds text for the first matching subelement, by tag name or path.
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367 #
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368 # @param path What element to look for.
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369 # @param default What to return if the element was not found.
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370 # @keyparam namespaces Optional namespace prefix map.
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371 # @return The text content of the first matching element, or the
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372 # default value no element was found. Note that if the element
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373 # is found, but has no text content, this method returns an
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374 # empty string.
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375 # @defreturn string
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376
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377 def findtext(self, path, default=None, namespaces=None):
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378 return ElementPath.findtext(self, path, default, namespaces)
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379
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380 ##
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381 # Finds all matching subelements, by tag name or path.
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382 #
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383 # @param path What element to look for.
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384 # @keyparam namespaces Optional namespace prefix map.
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385 # @return A list or other sequence containing all matching elements,
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386 # in document order.
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387 # @defreturn list of Element instances
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388
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389 def findall(self, path, namespaces=None):
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390 return ElementPath.findall(self, path, namespaces)
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391
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392 ##
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393 # Finds all matching subelements, by tag name or path.
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394 #
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395 # @param path What element to look for.
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396 # @keyparam namespaces Optional namespace prefix map.
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397 # @return An iterator or sequence containing all matching elements,
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398 # in document order.
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399 # @defreturn a generated sequence of Element instances
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400
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401 def iterfind(self, path, namespaces=None):
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402 return ElementPath.iterfind(self, path, namespaces)
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403
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404 ##
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405 # Resets an element. This function removes all subelements, clears
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406 # all attributes, and sets the <b>text</b> and <b>tail</b> attributes
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407 # to None.
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408
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409 def clear(self):
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410 self.attrib.clear()
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411 self._children = []
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412 self.text = self.tail = None
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413
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414 ##
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415 # Gets an element attribute. Equivalent to <b>attrib.get</b>, but
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416 # some implementations may handle this a bit more efficiently.
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417 #
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418 # @param key What attribute to look for.
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419 # @param default What to return if the attribute was not found.
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420 # @return The attribute value, or the default value, if the
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421 # attribute was not found.
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422 # @defreturn string or None
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423
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424 def get(self, key, default=None):
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425 return self.attrib.get(key, default)
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426
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427 ##
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428 # Sets an element attribute. Equivalent to <b>attrib[key] = value</b>,
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429 # but some implementations may handle this a bit more efficiently.
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430 #
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431 # @param key What attribute to set.
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432 # @param value The attribute value.
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433
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434 def set(self, key, value):
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435 self.attrib[key] = value
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436
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437 ##
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438 # Gets a list of attribute names. The names are returned in an
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439 # arbitrary order (just like for an ordinary Python dictionary).
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440 # Equivalent to <b>attrib.keys()</b>.
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441 #
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442 # @return A list of element attribute names.
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443 # @defreturn list of strings
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444
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445 def keys(self):
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446 return self.attrib.keys()
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447
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448 ##
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449 # Gets element attributes, as a sequence. The attributes are
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450 # returned in an arbitrary order. Equivalent to <b>attrib.items()</b>.
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451 #
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452 # @return A list of (name, value) tuples for all attributes.
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453 # @defreturn list of (string, string) tuples
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454
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455 def items(self):
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456 return self.attrib.items()
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457
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458 ##
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459 # Creates a tree iterator. The iterator loops over this element
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460 # and all subelements, in document order, and returns all elements
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461 # with a matching tag.
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462 # <p>
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463 # If the tree structure is modified during iteration, new or removed
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464 # elements may or may not be included. To get a stable set, use the
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465 # list() function on the iterator, and loop over the resulting list.
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466 #
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467 # @param tag What tags to look for (default is to return all elements).
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468 # @return An iterator containing all the matching elements.
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469 # @defreturn iterator
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470
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471 def iter(self, tag=None):
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472 if tag == "*":
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473 tag = None
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474 if tag is None or self.tag == tag:
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475 yield self
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476 for e in self._children:
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477 for e in e.iter(tag):
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478 yield e
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479
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480 # compatibility
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481 def getiterator(self, tag=None):
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482 # Change for a DeprecationWarning in 1.4
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483 warnings.warn(
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484 "This method will be removed in future versions. "
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485 "Use 'elem.iter()' or 'list(elem.iter())' instead.",
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486 PendingDeprecationWarning, stacklevel=2
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487 )
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488 return list(self.iter(tag))
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489
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490 ##
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491 # Creates a text iterator. The iterator loops over this element
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492 # and all subelements, in document order, and returns all inner
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493 # text.
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494 #
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495 # @return An iterator containing all inner text.
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496 # @defreturn iterator
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497
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498 def itertext(self):
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499 tag = self.tag
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500 if not isinstance(tag, str) and tag is not None:
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501 return
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502 if self.text:
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503 yield self.text
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504 for e in self:
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505 for s in e.itertext():
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506 yield s
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507 if e.tail:
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508 yield e.tail
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509
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510 # compatibility
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511 _Element = _ElementInterface = Element
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512
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513 ##
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514 # Subelement factory. This function creates an element instance, and
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515 # appends it to an existing element.
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516 # <p>
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517 # The element name, attribute names, and attribute values can be
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518 # either 8-bit ASCII strings or Unicode strings.
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519 #
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520 # @param parent The parent element.
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521 # @param tag The subelement name.
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522 # @param attrib An optional dictionary, containing element attributes.
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523 # @param **extra Additional attributes, given as keyword arguments.
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524 # @return An element instance.
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525 # @defreturn Element
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526
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527 def SubElement(parent, tag, attrib={}, **extra):
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528 attrib = attrib.copy()
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529 attrib.update(extra)
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530 element = parent.makeelement(tag, attrib)
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531 parent.append(element)
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532 return element
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533
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534 ##
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535 # Comment element factory. This factory function creates a special
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536 # element that will be serialized as an XML comment by the standard
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537 # serializer.
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538 # <p>
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539 # The comment string can be either an 8-bit ASCII string or a Unicode
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540 # string.
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541 #
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542 # @param text A string containing the comment string.
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543 # @return An element instance, representing a comment.
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544 # @defreturn Element
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545
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546 def Comment(text=None):
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547 element = Element(Comment)
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548 element.text = text
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549 return element
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550
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551 ##
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552 # PI element factory. This factory function creates a special element
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553 # that will be serialized as an XML processing instruction by the standard
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554 # serializer.
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555 #
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556 # @param target A string containing the PI target.
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557 # @param text A string containing the PI contents, if any.
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558 # @return An element instance, representing a PI.
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559 # @defreturn Element
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560
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561 def ProcessingInstruction(target, text=None):
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562 element = Element(ProcessingInstruction)
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563 element.text = target
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564 if text:
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565 element.text = element.text + " " + text
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566 return element
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567
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568 PI = ProcessingInstruction
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569
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570 ##
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571 # QName wrapper. This can be used to wrap a QName attribute value, in
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572 # order to get proper namespace handling on output.
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573 #
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574 # @param text A string containing the QName value, in the form {uri}local,
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575 # or, if the tag argument is given, the URI part of a QName.
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576 # @param tag Optional tag. If given, the first argument is interpreted as
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577 # an URI, and this argument is interpreted as a local name.
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578 # @return An opaque object, representing the QName.
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579
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580 class QName:
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581 def __init__(self, text_or_uri, tag=None):
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582 if tag:
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583 text_or_uri = "{%s}%s" % (text_or_uri, tag)
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584 self.text = text_or_uri
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585 def __str__(self):
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586 return self.text
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587 def __repr__(self):
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588 return '<QName %r>' % (self.text,)
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589 def __hash__(self):
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590 return hash(self.text)
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591 def __le__(self, other):
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592 if isinstance(other, QName):
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593 return self.text <= other.text
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594 return self.text <= other
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595 def __lt__(self, other):
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596 if isinstance(other, QName):
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597 return self.text < other.text
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598 return self.text < other
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599 def __ge__(self, other):
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600 if isinstance(other, QName):
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601 return self.text >= other.text
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602 return self.text >= other
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603 def __gt__(self, other):
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604 if isinstance(other, QName):
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605 return self.text > other.text
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606 return self.text > other
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607 def __eq__(self, other):
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608 if isinstance(other, QName):
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609 return self.text == other.text
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610 return self.text == other
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611 def __ne__(self, other):
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612 if isinstance(other, QName):
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613 return self.text != other.text
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614 return self.text != other
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615
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616 # --------------------------------------------------------------------
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617
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618 ##
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619 # ElementTree wrapper class. This class represents an entire element
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620 # hierarchy, and adds some extra support for serialization to and from
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621 # standard XML.
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622 #
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623 # @param element Optional root element.
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624 # @keyparam file Optional file handle or file name. If given, the
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625 # tree is initialized with the contents of this XML file.
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626
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627 class ElementTree:
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628
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629 def __init__(self, element=None, file=None):
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630 # assert element is None or iselement(element)
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631 self._root = element # first node
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632 if file:
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633 self.parse(file)
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634
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635 ##
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636 # Gets the root element for this tree.
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637 #
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638 # @return An element instance.
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639 # @defreturn Element
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640
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641 def getroot(self):
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642 return self._root
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643
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644 ##
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645 # Replaces the root element for this tree. This discards the
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646 # current contents of the tree, and replaces it with the given
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647 # element. Use with care.
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648 #
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649 # @param element An element instance.
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650
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651 def _setroot(self, element):
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652 # assert iselement(element)
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653 self._root = element
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654
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655 ##
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656 # Loads an external XML document into this element tree.
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657 #
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658 # @param source A file name or file object. If a file object is
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659 # given, it only has to implement a <b>read(n)</b> method.
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660 # @keyparam parser An optional parser instance. If not given, the
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661 # standard {@link XMLParser} parser is used.
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662 # @return The document root element.
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663 # @defreturn Element
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664 # @exception ParseError If the parser fails to parse the document.
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665
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666 def parse(self, source, parser=None):
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667 close_source = False
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668 if not hasattr(source, "read"):
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669 source = open(source, "rb")
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670 close_source = True
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671 try:
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672 if not parser:
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673 parser = XMLParser(target=TreeBuilder())
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674 while 1:
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675 data = source.read(65536)
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676 if not data:
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677 break
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678 parser.feed(data)
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679 self._root = parser.close()
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680 return self._root
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681 finally:
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682 if close_source:
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683 source.close()
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684
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685 ##
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686 # Creates a tree iterator for the root element. The iterator loops
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687 # over all elements in this tree, in document order.
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688 #
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689 # @param tag What tags to look for (default is to return all elements)
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690 # @return An iterator.
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691 # @defreturn iterator
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692
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693 def iter(self, tag=None):
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694 # assert self._root is not None
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695 return self._root.iter(tag)
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696
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697 # compatibility
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698 def getiterator(self, tag=None):
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699 # Change for a DeprecationWarning in 1.4
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700 warnings.warn(
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701 "This method will be removed in future versions. "
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702 "Use 'tree.iter()' or 'list(tree.iter())' instead.",
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703 PendingDeprecationWarning, stacklevel=2
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704 )
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705 return list(self.iter(tag))
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706
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707 ##
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708 # Finds the first toplevel element with given tag.
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709 # Same as getroot().find(path).
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710 #
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711 # @param path What element to look for.
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712 # @keyparam namespaces Optional namespace prefix map.
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713 # @return The first matching element, or None if no element was found.
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714 # @defreturn Element or None
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715
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716 def find(self, path, namespaces=None):
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717 # assert self._root is not None
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718 if path[:1] == "/":
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719 path = "." + path
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720 warnings.warn(
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721 "This search is broken in 1.3 and earlier, and will be "
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722 "fixed in a future version. If you rely on the current "
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723 "behaviour, change it to %r" % path,
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724 FutureWarning, stacklevel=2
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725 )
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726 return self._root.find(path, namespaces)
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727
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728 ##
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729 # Finds the element text for the first toplevel element with given
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730 # tag. Same as getroot().findtext(path).
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731 #
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732 # @param path What toplevel element to look for.
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733 # @param default What to return if the element was not found.
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734 # @keyparam namespaces Optional namespace prefix map.
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735 # @return The text content of the first matching element, or the
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736 # default value no element was found. Note that if the element
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737 # is found, but has no text content, this method returns an
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738 # empty string.
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739 # @defreturn string
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740
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741 def findtext(self, path, default=None, namespaces=None):
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742 # assert self._root is not None
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743 if path[:1] == "/":
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744 path = "." + path
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745 warnings.warn(
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746 "This search is broken in 1.3 and earlier, and will be "
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747 "fixed in a future version. If you rely on the current "
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diff changeset
748 "behaviour, change it to %r" % path,
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749 FutureWarning, stacklevel=2
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750 )
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751 return self._root.findtext(path, default, namespaces)
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752
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753 ##
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754 # Finds all toplevel elements with the given tag.
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755 # Same as getroot().findall(path).
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756 #
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757 # @param path What element to look for.
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758 # @keyparam namespaces Optional namespace prefix map.
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759 # @return A list or iterator containing all matching elements,
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760 # in document order.
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761 # @defreturn list of Element instances
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762
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763 def findall(self, path, namespaces=None):
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764 # assert self._root is not None
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765 if path[:1] == "/":
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766 path = "." + path
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767 warnings.warn(
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768 "This search is broken in 1.3 and earlier, and will be "
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769 "fixed in a future version. If you rely on the current "
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770 "behaviour, change it to %r" % path,
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771 FutureWarning, stacklevel=2
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772 )
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773 return self._root.findall(path, namespaces)
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774
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775 ##
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776 # Finds all matching subelements, by tag name or path.
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777 # Same as getroot().iterfind(path).
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778 #
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779 # @param path What element to look for.
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780 # @keyparam namespaces Optional namespace prefix map.
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781 # @return An iterator or sequence containing all matching elements,
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782 # in document order.
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783 # @defreturn a generated sequence of Element instances
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784
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785 def iterfind(self, path, namespaces=None):
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786 # assert self._root is not None
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787 if path[:1] == "/":
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788 path = "." + path
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789 warnings.warn(
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790 "This search is broken in 1.3 and earlier, and will be "
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791 "fixed in a future version. If you rely on the current "
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792 "behaviour, change it to %r" % path,
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793 FutureWarning, stacklevel=2
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794 )
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795 return self._root.iterfind(path, namespaces)
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796
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797 ##
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798 # Writes the element tree to a file, as XML.
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799 #
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800 # @def write(file, **options)
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801 # @param file A file name, or a file object opened for writing.
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802 # @param **options Options, given as keyword arguments.
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803 # @keyparam encoding Optional output encoding (default is US-ASCII).
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804 # Use "unicode" to return a Unicode string.
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805 # @keyparam method Optional output method ("xml", "html", "text" or
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806 # "c14n"; default is "xml").
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807 # @keyparam xml_declaration Controls if an XML declaration should
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808 # be added to the file. Use False for never, True for always,
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809 # None for only if not US-ASCII or UTF-8 or Unicode. None is default.
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810
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811 def write(self, file_or_filename,
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812 # keyword arguments
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813 encoding=None,
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814 xml_declaration=None,
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815 default_namespace=None,
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816 method=None):
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817 # assert self._root is not None
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818 if not method:
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819 method = "xml"
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820 elif method not in _serialize:
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821 # FIXME: raise an ImportError for c14n if ElementC14N is missing?
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822 raise ValueError("unknown method %r" % method)
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823 if not encoding:
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824 if method == "c14n":
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825 encoding = "utf-8"
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826 else:
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Florent Xicluna <florent.xicluna@gmail.com>
parents: 59601
diff changeset
827 encoding = "us-ascii"
57e631f088d7 Issue #8047: Fix the xml.etree serializer to return bytes by default.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 59601
diff changeset
828 elif encoding == str: # lxml.etree compatibility.
57e631f088d7 Issue #8047: Fix the xml.etree serializer to return bytes by default.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 59601
diff changeset
829 encoding = "unicode"
57e631f088d7 Issue #8047: Fix the xml.etree serializer to return bytes by default.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 59601
diff changeset
830 else:
57e631f088d7 Issue #8047: Fix the xml.etree serializer to return bytes by default.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 59601
diff changeset
831 encoding = encoding.lower()
59601
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diff changeset
832 if hasattr(file_or_filename, "write"):
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diff changeset
833 file = file_or_filename
39442
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diff changeset
834 else:
63845
57e631f088d7 Issue #8047: Fix the xml.etree serializer to return bytes by default.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 59601
diff changeset
835 if encoding != "unicode":
59601
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diff changeset
836 file = open(file_or_filename, "wb")
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diff changeset
837 else:
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diff changeset
838 file = open(file_or_filename, "w")
63845
57e631f088d7 Issue #8047: Fix the xml.etree serializer to return bytes by default.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 59601
diff changeset
839 if encoding != "unicode":
59601
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diff changeset
840 def write(text):
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diff changeset
841 try:
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diff changeset
842 return file.write(text.encode(encoding,
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diff changeset
843 "xmlcharrefreplace"))
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diff changeset
844 except (TypeError, AttributeError):
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diff changeset
845 _raise_serialization_error(text)
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diff changeset
846 else:
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Florent Xicluna <florent.xicluna@gmail.com>
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diff changeset
847 write = file.write
63845
57e631f088d7 Issue #8047: Fix the xml.etree serializer to return bytes by default.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 59601
diff changeset
848 if method == "xml" and (xml_declaration or
57e631f088d7 Issue #8047: Fix the xml.etree serializer to return bytes by default.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 59601
diff changeset
849 (xml_declaration is None and
57e631f088d7 Issue #8047: Fix the xml.etree serializer to return bytes by default.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 59601
diff changeset
850 encoding not in ("utf-8", "us-ascii", "unicode"))):
57e631f088d7 Issue #8047: Fix the xml.etree serializer to return bytes by default.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 59601
diff changeset
851 declared_encoding = encoding
57e631f088d7 Issue #8047: Fix the xml.etree serializer to return bytes by default.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 59601
diff changeset
852 if encoding == "unicode":
57e631f088d7 Issue #8047: Fix the xml.etree serializer to return bytes by default.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 59601
diff changeset
853 # Retrieve the default encoding for the xml declaration
57e631f088d7 Issue #8047: Fix the xml.etree serializer to return bytes by default.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 59601
diff changeset
854 import locale
57e631f088d7 Issue #8047: Fix the xml.etree serializer to return bytes by default.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 59601
diff changeset
855 declared_encoding = locale.getpreferredencoding()
57e631f088d7 Issue #8047: Fix the xml.etree serializer to return bytes by default.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 59601
diff changeset
856 write("<?xml version='1.0' encoding='%s'?>\n" % declared_encoding)
59601
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diff changeset
857 if method == "text":
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diff changeset
858 _serialize_text(write, self._root)
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diff changeset
859 else:
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diff changeset
860 qnames, namespaces = _namespaces(self._root, default_namespace)
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diff changeset
861 serialize = _serialize[method]
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diff changeset
862 serialize(write, self._root, qnames, namespaces)
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diff changeset
863 if file_or_filename is not file:
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diff changeset
864 file.close()
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diff changeset
865
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diff changeset
866 def write_c14n(self, file):
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diff changeset
867 # lxml.etree compatibility. use output method instead
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diff changeset
868 return self.write(file, method="c14n")
39442
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diff changeset
869
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parents:
diff changeset
870 # --------------------------------------------------------------------
59601
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diff changeset
871 # serialization support
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diff changeset
872
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diff changeset
873 def _namespaces(elem, default_namespace=None):
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diff changeset
874 # identify namespaces used in this tree
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diff changeset
875
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diff changeset
876 # maps qnames to *encoded* prefix:local names
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diff changeset
877 qnames = {None: None}
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diff changeset
878
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diff changeset
879 # maps uri:s to prefixes
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diff changeset
880 namespaces = {}
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diff changeset
881 if default_namespace:
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diff changeset
882 namespaces[default_namespace] = ""
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diff changeset
883
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parents: 58849
diff changeset
884 def add_qname(qname):
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parents: 58849
diff changeset
885 # calculate serialized qname representation
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diff changeset
886 try:
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diff changeset
887 if qname[:1] == "{":
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parents: 58849
diff changeset
888 uri, tag = qname[1:].rsplit("}", 1)
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parents: 58849
diff changeset
889 prefix = namespaces.get(uri)
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diff changeset
890 if prefix is None:
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diff changeset
891 prefix = _namespace_map.get(uri)
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diff changeset
892 if prefix is None:
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diff changeset
893 prefix = "ns%d" % len(namespaces)
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diff changeset
894 if prefix != "xml":
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diff changeset
895 namespaces[uri] = prefix
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diff changeset
896 if prefix:
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diff changeset
897 qnames[qname] = "%s:%s" % (prefix, tag)
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diff changeset
898 else:
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diff changeset
899 qnames[qname] = tag # default element
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diff changeset
900 else:
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diff changeset
901 if default_namespace:
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diff changeset
902 # FIXME: can this be handled in XML 1.0?
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parents: 58849
diff changeset
903 raise ValueError(
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parents: 58849
diff changeset
904 "cannot use non-qualified names with "
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parents: 58849
diff changeset
905 "default_namespace option"
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parents: 58849
diff changeset
906 )
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parents: 58849
diff changeset
907 qnames[qname] = qname
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diff changeset
908 except TypeError:
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diff changeset
909 _raise_serialization_error(qname)
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diff changeset
910
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diff changeset
911 # populate qname and namespaces table
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diff changeset
912 try:
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diff changeset
913 iterate = elem.iter
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diff changeset
914 except AttributeError:
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diff changeset
915 iterate = elem.getiterator # cET compatibility
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diff changeset
916 for elem in iterate():
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parents: 58849
diff changeset
917 tag = elem.tag
66099
9a66feb07a0a Fix Issue10205 - XML QName error when different tags have same QName.
Senthil Kumaran <orsenthil@gmail.com>
parents: 65707
diff changeset
918 if isinstance(tag, QName):
9a66feb07a0a Fix Issue10205 - XML QName error when different tags have same QName.
Senthil Kumaran <orsenthil@gmail.com>
parents: 65707
diff changeset
919 if tag.text not in qnames:
9a66feb07a0a Fix Issue10205 - XML QName error when different tags have same QName.
Senthil Kumaran <orsenthil@gmail.com>
parents: 65707
diff changeset
920 add_qname(tag.text)
59601
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diff changeset
921 elif isinstance(tag, str):
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diff changeset
922 if tag not in qnames:
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diff changeset
923 add_qname(tag)
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diff changeset
924 elif tag is not None and tag is not Comment and tag is not PI:
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diff changeset
925 _raise_serialization_error(tag)
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diff changeset
926 for key, value in elem.items():
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
927 if isinstance(key, QName):
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
928 key = key.text
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
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diff changeset
929 if key not in qnames:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
930 add_qname(key)
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
931 if isinstance(value, QName) and value.text not in qnames:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
932 add_qname(value.text)
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
933 text = elem.text
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
934 if isinstance(text, QName) and text.text not in qnames:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
935 add_qname(text.text)
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
936 return qnames, namespaces
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
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diff changeset
937
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
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parents: 58849
diff changeset
938 def _serialize_xml(write, elem, qnames, namespaces):
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
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diff changeset
939 tag = elem.tag
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
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diff changeset
940 text = elem.text
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
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diff changeset
941 if tag is Comment:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
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diff changeset
942 write("<!--%s-->" % text)
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
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diff changeset
943 elif tag is ProcessingInstruction:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
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diff changeset
944 write("<?%s?>" % text)
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
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diff changeset
945 else:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
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diff changeset
946 tag = qnames[tag]
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diff changeset
947 if tag is None:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
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diff changeset
948 if text:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
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diff changeset
949 write(_escape_cdata(text))
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Florent Xicluna <florent.xicluna@gmail.com>
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diff changeset
950 for e in elem:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
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diff changeset
951 _serialize_xml(write, e, qnames, None)
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diff changeset
952 else:
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diff changeset
953 write("<" + tag)
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diff changeset
954 items = list(elem.items())
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diff changeset
955 if items or namespaces:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
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diff changeset
956 if namespaces:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
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diff changeset
957 for v, k in sorted(namespaces.items(),
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diff changeset
958 key=lambda x: x[1]): # sort on prefix
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diff changeset
959 if k:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
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diff changeset
960 k = ":" + k
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Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
961 write(" xmlns%s=\"%s\"" % (
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diff changeset
962 k,
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diff changeset
963 _escape_attrib(v)
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diff changeset
964 ))
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diff changeset
965 for k, v in sorted(items): # lexical order
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diff changeset
966 if isinstance(k, QName):
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diff changeset
967 k = k.text
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diff changeset
968 if isinstance(v, QName):
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diff changeset
969 v = qnames[v.text]
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diff changeset
970 else:
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parents: 58849
diff changeset
971 v = _escape_attrib(v)
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diff changeset
972 write(" %s=\"%s\"" % (qnames[k], v))
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diff changeset
973 if text or len(elem):
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diff changeset
974 write(">")
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diff changeset
975 if text:
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diff changeset
976 write(_escape_cdata(text))
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parents: 58849
diff changeset
977 for e in elem:
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parents: 58849
diff changeset
978 _serialize_xml(write, e, qnames, None)
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diff changeset
979 write("</" + tag + ">")
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diff changeset
980 else:
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diff changeset
981 write(" />")
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diff changeset
982 if elem.tail:
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diff changeset
983 write(_escape_cdata(elem.tail))
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diff changeset
984
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diff changeset
985 HTML_EMPTY = ("area", "base", "basefont", "br", "col", "frame", "hr",
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diff changeset
986 "img", "input", "isindex", "link", "meta" "param")
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diff changeset
987
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diff changeset
988 try:
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diff changeset
989 HTML_EMPTY = set(HTML_EMPTY)
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diff changeset
990 except NameError:
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diff changeset
991 pass
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diff changeset
992
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diff changeset
993 def _serialize_html(write, elem, qnames, namespaces):
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diff changeset
994 tag = elem.tag
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diff changeset
995 text = elem.text
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diff changeset
996 if tag is Comment:
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diff changeset
997 write("<!--%s-->" % _escape_cdata(text))
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diff changeset
998 elif tag is ProcessingInstruction:
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diff changeset
999 write("<?%s?>" % _escape_cdata(text))
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diff changeset
1000 else:
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diff changeset
1001 tag = qnames[tag]
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diff changeset
1002 if tag is None:
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diff changeset
1003 if text:
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diff changeset
1004 write(_escape_cdata(text))
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diff changeset
1005 for e in elem:
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diff changeset
1006 _serialize_html(write, e, qnames, None)
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diff changeset
1007 else:
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diff changeset
1008 write("<" + tag)
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diff changeset
1009 items = list(elem.items())
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diff changeset
1010 if items or namespaces:
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diff changeset
1011 if namespaces:
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diff changeset
1012 for v, k in sorted(namespaces.items(),
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diff changeset
1013 key=lambda x: x[1]): # sort on prefix
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diff changeset
1014 if k:
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diff changeset
1015 k = ":" + k
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diff changeset
1016 write(" xmlns%s=\"%s\"" % (
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diff changeset
1017 k,
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diff changeset
1018 _escape_attrib(v)
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diff changeset
1019 ))
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diff changeset
1020 for k, v in sorted(items): # lexical order
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diff changeset
1021 if isinstance(k, QName):
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diff changeset
1022 k = k.text
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diff changeset
1023 if isinstance(v, QName):
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1024 v = qnames[v.text]
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diff changeset
1025 else:
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diff changeset
1026 v = _escape_attrib_html(v)
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diff changeset
1027 # FIXME: handle boolean attributes
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1028 write(" %s=\"%s\"" % (qnames[k], v))
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diff changeset
1029 write(">")
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diff changeset
1030 tag = tag.lower()
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diff changeset
1031 if text:
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1032 if tag == "script" or tag == "style":
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diff changeset
1033 write(text)
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1034 else:
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diff changeset
1035 write(_escape_cdata(text))
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diff changeset
1036 for e in elem:
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1037 _serialize_html(write, e, qnames, None)
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diff changeset
1038 if tag not in HTML_EMPTY:
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diff changeset
1039 write("</" + tag + ">")
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diff changeset
1040 if elem.tail:
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diff changeset
1041 write(_escape_cdata(elem.tail))
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diff changeset
1042
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diff changeset
1043 def _serialize_text(write, elem):
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diff changeset
1044 for part in elem.itertext():
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diff changeset
1045 write(part)
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diff changeset
1046 if elem.tail:
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diff changeset
1047 write(elem.tail)
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diff changeset
1048
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diff changeset
1049 _serialize = {
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diff changeset
1050 "xml": _serialize_xml,
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diff changeset
1051 "html": _serialize_html,
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diff changeset
1052 "text": _serialize_text,
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diff changeset
1053 # this optional method is imported at the end of the module
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diff changeset
1054 # "c14n": _serialize_c14n,
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diff changeset
1055 }
39442
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diff changeset
1056
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diff changeset
1057 ##
59601
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1058 # Registers a namespace prefix. The registry is global, and any
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diff changeset
1059 # existing mapping for either the given prefix or the namespace URI
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diff changeset
1060 # will be removed.
39442
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1061 #
59601
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diff changeset
1062 # @param prefix Namespace prefix.
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diff changeset
1063 # @param uri Namespace uri. Tags and attributes in this namespace
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diff changeset
1064 # will be serialized with the given prefix, if at all possible.
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diff changeset
1065 # @exception ValueError If the prefix is reserved, or is otherwise
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diff changeset
1066 # invalid.
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diff changeset
1067
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diff changeset
1068 def register_namespace(prefix, uri):
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diff changeset
1069 if re.match("ns\d+$", prefix):
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diff changeset
1070 raise ValueError("Prefix format reserved for internal use")
67170
7d551d5ef4fc #10777: fix iteration over dict keys while mutating the dict.
Georg Brandl <georg@python.org>
parents: 66810
diff changeset
1071 for k, v in list(_namespace_map.items()):
59601
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diff changeset
1072 if k == uri or v == prefix:
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diff changeset
1073 del _namespace_map[k]
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diff changeset
1074 _namespace_map[uri] = prefix
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diff changeset
1075
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diff changeset
1076 _namespace_map = {
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diff changeset
1077 # "well-known" namespace prefixes
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diff changeset
1078 "http://www.w3.org/XML/1998/namespace": "xml",
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diff changeset
1079 "http://www.w3.org/1999/xhtml": "html",
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diff changeset
1080 "http://www.w3.org/1999/02/22-rdf-syntax-ns#": "rdf",
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diff changeset
1081 "http://schemas.xmlsoap.org/wsdl/": "wsdl",
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diff changeset
1082 # xml schema
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diff changeset
1083 "http://www.w3.org/2001/XMLSchema": "xs",
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diff changeset
1084 "http://www.w3.org/2001/XMLSchema-instance": "xsi",
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diff changeset
1085 # dublin core
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1086 "http://purl.org/dc/elements/1.1/": "dc",
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diff changeset
1087 }
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diff changeset
1088
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diff changeset
1089 def _raise_serialization_error(text):
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diff changeset
1090 raise TypeError(
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diff changeset
1091 "cannot serialize %r (type %s)" % (text, type(text).__name__)
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diff changeset
1092 )
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diff changeset
1093
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diff changeset
1094 def _escape_cdata(text):
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diff changeset
1095 # escape character data
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1096 try:
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1097 # it's worth avoiding do-nothing calls for strings that are
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diff changeset
1098 # shorter than 500 character, or so. assume that's, by far,
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diff changeset
1099 # the most common case in most applications.
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diff changeset
1100 if "&" in text:
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diff changeset
1101 text = text.replace("&", "&amp;")
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diff changeset
1102 if "<" in text:
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diff changeset
1103 text = text.replace("<", "&lt;")
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diff changeset
1104 if ">" in text:
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diff changeset
1105 text = text.replace(">", "&gt;")
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diff changeset
1106 return text
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1107 except (TypeError, AttributeError):
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diff changeset
1108 _raise_serialization_error(text)
39442
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1109
59601
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1110 def _escape_attrib(text):
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1111 # escape attribute value
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1112 try:
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diff changeset
1113 if "&" in text:
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diff changeset
1114 text = text.replace("&", "&amp;")
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diff changeset
1115 if "<" in text:
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diff changeset
1116 text = text.replace("<", "&lt;")
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1117 if ">" in text:
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diff changeset
1118 text = text.replace(">", "&gt;")
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1119 if "\"" in text:
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1120 text = text.replace("\"", "&quot;")
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1121 if "\n" in text:
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1122 text = text.replace("\n", "&#10;")
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1123 return text
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1124 except (TypeError, AttributeError):
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1125 _raise_serialization_error(text)
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1126
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1127 def _escape_attrib_html(text):
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1128 # escape attribute value
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1129 try:
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1130 if "&" in text:
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1131 text = text.replace("&", "&amp;")
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1132 if ">" in text:
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1133 text = text.replace(">", "&gt;")
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1134 if "\"" in text:
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1135 text = text.replace("\"", "&quot;")
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diff changeset
1136 return text
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1137 except (TypeError, AttributeError):
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1138 _raise_serialization_error(text)
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1139
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diff changeset
1140 # --------------------------------------------------------------------
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1141
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1142 ##
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1143 # Generates a string representation of an XML element, including all
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1144 # subelements. If encoding is "unicode", the return type is a string;
59601
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1145 # otherwise it is a bytes array.
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1146 #
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1147 # @param element An Element instance.
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1148 # @keyparam encoding Optional output encoding (default is US-ASCII).
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1149 # Use "unicode" to return a Unicode string.
59601
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1150 # @keyparam method Optional output method ("xml", "html", "text" or
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1151 # "c14n"; default is "xml").
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1152 # @return An (optionally) encoded string containing the XML data.
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1153 # @defreturn string
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1154
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1155 def tostring(element, encoding=None, method=None):
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1156 class dummy:
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1157 pass
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1158 data = []
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1159 file = dummy()
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1160 file.write = data.append
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1161 ElementTree(element).write(file, encoding, method=method)
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1162 if encoding in (str, "unicode"):
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1163 return "".join(data)
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1164 else:
59601
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1165 return b"".join(data)
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1166
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1167 ##
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1168 # Generates a string representation of an XML element, including all
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1169 # subelements. If encoding is False, the string is returned as a
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1170 # sequence of string fragments; otherwise it is a sequence of
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1171 # bytestrings.
59601
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1172 #
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1173 # @param element An Element instance.
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1174 # @keyparam encoding Optional output encoding (default is US-ASCII).
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1175 # Use "unicode" to return a Unicode string.
59601
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1176 # @keyparam method Optional output method ("xml", "html", "text" or
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1177 # "c14n"; default is "xml").
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1178 # @return A sequence object containing the XML data.
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1179 # @defreturn sequence
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1180 # @since 1.3
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1181
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1182 def tostringlist(element, encoding=None, method=None):
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1183 class dummy:
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1184 pass
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1185 data = []
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1186 file = dummy()
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1187 file.write = data.append
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1188 ElementTree(element).write(file, encoding, method=method)
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1189 # FIXME: merge small fragments into larger parts
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1190 return data
39442
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1191
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1192 ##
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1193 # Writes an element tree or element structure to sys.stdout. This
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1194 # function should be used for debugging only.
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1195 # <p>
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1196 # The exact output format is implementation dependent. In this
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1197 # version, it's written as an ordinary XML file.
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1198 #
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1199 # @param elem An element tree or an individual element.
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1200
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1201 def dump(elem):
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1202 # debugging
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1203 if not isinstance(elem, ElementTree):
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1204 elem = ElementTree(elem)
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1205 elem.write(sys.stdout, encoding="unicode")
39442
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1206 tail = elem.getroot().tail
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1207 if not tail or tail[-1] != "\n":
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1208 sys.stdout.write("\n")
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1209
59601
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1210 # --------------------------------------------------------------------
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1211 # parsing
39442
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1212
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1213 ##
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1214 # Parses an XML document into an element tree.
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1215 #
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1216 # @param source A filename or file object containing XML data.
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1217 # @param parser An optional parser instance. If not given, the
59601
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1218 # standard {@link XMLParser} parser is used.
39442
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1219 # @return An ElementTree instance
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1220
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1221 def parse(source, parser=None):
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1222 tree = ElementTree()
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1223 tree.parse(source, parser)
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1224 return tree
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diff changeset
1225
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1226 ##
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1227 # Parses an XML document into an element tree incrementally, and reports
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1228 # what's going on to the user.
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1229 #
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1230 # @param source A filename or file object containing XML data.
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1231 # @param events A list of events to report back. If omitted, only "end"
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1232 # events are reported.
59601
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
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diff changeset
1233 # @param parser An optional parser instance. If not given, the
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Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1234 # standard {@link XMLParser} parser is used.
39442
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1235 # @return A (event, elem) iterator.
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1236
59601
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Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1237 def iterparse(source, events=None, parser=None):
65707
cff78ffb932a Issue #10093: ResourceWarnings are now issued when files and sockets are
Antoine Pitrou <solipsis@pitrou.net>
parents: 63845
diff changeset
1238 close_source = False
59601
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Florent Xicluna <florent.xicluna@gmail.com>
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diff changeset
1239 if not hasattr(source, "read"):
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Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1240 source = open(source, "rb")
65707
cff78ffb932a Issue #10093: ResourceWarnings are now issued when files and sockets are
Antoine Pitrou <solipsis@pitrou.net>
parents: 63845
diff changeset
1241 close_source = True
59601
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Florent Xicluna <florent.xicluna@gmail.com>
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diff changeset
1242 if not parser:
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Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1243 parser = XMLParser(target=TreeBuilder())
65707
cff78ffb932a Issue #10093: ResourceWarnings are now issued when files and sockets are
Antoine Pitrou <solipsis@pitrou.net>
parents: 63845
diff changeset
1244 return _IterParseIterator(source, events, parser, close_source)
39442
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diff changeset
1245
59601
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Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1246 class _IterParseIterator:
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Florent Xicluna <florent.xicluna@gmail.com>
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diff changeset
1247
65707
cff78ffb932a Issue #10093: ResourceWarnings are now issued when files and sockets are
Antoine Pitrou <solipsis@pitrou.net>
parents: 63845
diff changeset
1248 def __init__(self, source, events, parser, close_source=False):
39442
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parents:
diff changeset
1249 self._file = source
65707
cff78ffb932a Issue #10093: ResourceWarnings are now issued when files and sockets are
Antoine Pitrou <solipsis@pitrou.net>
parents: 63845
diff changeset
1250 self._close_file = close_source
39442
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diff changeset
1251 self._events = []
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diff changeset
1252 self._index = 0
73291
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1253 self._error = None
39442
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diff changeset
1254 self.root = self._root = None
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diff changeset
1255 self._parser = parser
39442
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diff changeset
1256 # wire up the parser for event reporting
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1257 parser = self._parser._parser
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parents:
diff changeset
1258 append = self._events.append
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diff changeset
1259 if events is None:
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diff changeset
1260 events = ["end"]
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parents:
diff changeset
1261 for event in events:
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1262 if event == "start":
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parents:
diff changeset
1263 try:
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diff changeset
1264 parser.ordered_attributes = 1
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1265 parser.specified_attributes = 1
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1266 def handler(tag, attrib_in, event=event, append=append,
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1267 start=self._parser._start_list):
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1268 append((event, start(tag, attrib_in)))
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1269 parser.StartElementHandler = handler
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1270 except AttributeError:
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1271 def handler(tag, attrib_in, event=event, append=append,
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1272 start=self._parser._start):
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1273 append((event, start(tag, attrib_in)))
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1274 parser.StartElementHandler = handler
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1275 elif event == "end":
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parents:
diff changeset
1276 def handler(tag, event=event, append=append,
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1277 end=self._parser._end):
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1278 append((event, end(tag)))
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1279 parser.EndElementHandler = handler
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1280 elif event == "start-ns":
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1281 def handler(prefix, uri, event=event, append=append):
59601
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Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1282 append((event, (prefix or "", uri or "")))
39442
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1283 parser.StartNamespaceDeclHandler = handler
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1284 elif event == "end-ns":
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1285 def handler(prefix, event=event, append=append):
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1286 append((event, None))
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1287 parser.EndNamespaceDeclHandler = handler
59601
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diff changeset
1288 else:
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Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1289 raise ValueError("unknown event %r" % event)
39442
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1290
41501
0c5019afc55b PEP 3114: rename .next() to .__next__() and add next() builtin.
Georg Brandl <georg@python.org>
parents: 41480
diff changeset
1291 def __next__(self):
39442
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1292 while 1:
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parents:
diff changeset
1293 try:
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1294 item = self._events[self._index]
73291
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1295 self._index += 1
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1296 return item
39442
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1297 except IndexError:
73291
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1298 pass
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1299 if self._error:
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1300 e = self._error
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1301 self._error = None
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1302 raise e
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1303 if self._parser is None:
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1304 self.root = self._root
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1305 if self._close_file:
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1306 self._file.close()
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1307 raise StopIteration
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1308 # load event buffer
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1309 del self._events[:]
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1310 self._index = 0
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1311 data = self._file.read(16384)
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1312 if data:
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1313 try:
39442
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parents:
diff changeset
1314 self._parser.feed(data)
73291
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1315 except SyntaxError as exc:
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1316 self._error = exc
39442
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parents:
diff changeset
1317 else:
73291
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1318 self._root = self._parser.close()
23ffaf975267 Closes #2892: preserve iterparse events in case of SyntaxError.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 67170
diff changeset
1319 self._parser = None
39442
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diff changeset
1320
59601
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diff changeset
1321 def __iter__(self):
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diff changeset
1322 return self
39442
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parents:
diff changeset
1323
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parents:
diff changeset
1324 ##
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parents:
diff changeset
1325 # Parses an XML document from a string constant. This function can
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1326 # be used to embed "XML literals" in Python code.
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1327 #
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parents:
diff changeset
1328 # @param source A string containing XML data.
59601
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diff changeset
1329 # @param parser An optional parser instance. If not given, the
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diff changeset
1330 # standard {@link XMLParser} parser is used.
39442
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parents:
diff changeset
1331 # @return An Element instance.
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1332 # @defreturn Element
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parents:
diff changeset
1333
59601
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diff changeset
1334 def XML(text, parser=None):
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parents: 58849
diff changeset
1335 if not parser:
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Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1336 parser = XMLParser(target=TreeBuilder())
39442
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1337 parser.feed(text)
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parents:
diff changeset
1338 return parser.close()
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1339
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1340 ##
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1341 # Parses an XML document from a string constant, and also returns
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1342 # a dictionary which maps from element id:s to elements.
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
1343 #
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parents:
diff changeset
1344 # @param source A string containing XML data.
59601
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1345 # @param parser An optional parser instance. If not given, the
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diff changeset
1346 # standard {@link XMLParser} parser is used.
39442
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parents:
diff changeset
1347 # @return A tuple containing an Element instance and a dictionary.
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parents:
diff changeset
1348 # @defreturn (Element, dictionary)
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1349
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1350 def XMLID(text, parser=None):
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1351 if not parser:
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1352 parser = XMLParser(target=TreeBuilder())
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1353 parser.feed(text)
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1354 tree = parser.close()
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1355 ids = {}
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1356 for elem in tree.iter():
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1357 id = elem.get("id")
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1358 if id:
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1359 ids[id] = elem
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1360 return tree, ids
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1361
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1362 ##
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1363 # Parses an XML document from a string constant. Same as {@link #XML}.
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1364 #
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1365 # @def fromstring(text)
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1366 # @param source A string containing XML data.
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1367 # @return An Element instance.
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1368 # @defreturn Element
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1369
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1370 fromstring = XML
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1371
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1372 ##
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1373 # Parses an XML document from a sequence of string fragments.
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1374 #
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1375 # @param sequence A list or other sequence containing XML data fragments.
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1376 # @param parser An optional parser instance. If not given, the
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1377 # standard {@link XMLParser} parser is used.
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1378 # @return An Element instance.
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1379 # @defreturn Element
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1380 # @since 1.3
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1381
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1382 def fromstringlist(sequence, parser=None):
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1383 if not parser:
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1384 parser = XMLParser(target=TreeBuilder())
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1385 for text in sequence:
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1386 parser.feed(text)
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1387 return parser.close()
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1388
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1389 # --------------------------------------------------------------------
39442
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1390
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1391 ##
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1392 # Generic element structure builder. This builder converts a sequence
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1393 # of {@link #TreeBuilder.start}, {@link #TreeBuilder.data}, and {@link
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1394 # #TreeBuilder.end} method calls to a well-formed element structure.
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1395 # <p>
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1396 # You can use this class to build an element structure using a custom XML
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1397 # parser, or a parser for some other XML-like format.
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diff changeset
1398 #
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1399 # @param element_factory Optional element factory. This factory
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1400 # is called to create new Element instances, as necessary.
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1401
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1402 class TreeBuilder:
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1403
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1404 def __init__(self, element_factory=None):
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1405 self._data = [] # data collector
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1406 self._elem = [] # element stack
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1407 self._last = None # last element
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1408 self._tail = None # true if we're after an end tag
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1409 if element_factory is None:
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1410 element_factory = Element
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1411 self._factory = element_factory
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1412
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1413 ##
59601
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1414 # Flushes the builder buffers, and returns the toplevel document
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1415 # element.
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1416 #
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1417 # @return An Element instance.
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1418 # @defreturn Element
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1419
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1420 def close(self):
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1421 assert len(self._elem) == 0, "missing end tags"
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1422 assert self._last is not None, "missing toplevel element"
39442
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1423 return self._last
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1424
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1425 def _flush(self):
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1426 if self._data:
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1427 if self._last is not None:
41480
99027c2b3fd2 Remove functions in string module that are also string methods. Also remove:
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diff changeset
1428 text = "".join(self._data)
39442
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1429 if self._tail:
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1430 assert self._last.tail is None, "internal error (tail)"
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1431 self._last.tail = text
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1432 else:
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1433 assert self._last.text is None, "internal error (text)"
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1434 self._last.text = text
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1435 self._data = []
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1436
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1437 ##
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1438 # Adds text to the current element.
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1439 #
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1440 # @param data A string. This should be either an 8-bit string
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1441 # containing ASCII text, or a Unicode string.
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1442
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1443 def data(self, data):
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1444 self._data.append(data)
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1445
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1446 ##
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1447 # Opens a new element.
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1448 #
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1449 # @param tag The element name.
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1450 # @param attrib A dictionary containing element attributes.
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1451 # @return The opened element.
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1452 # @defreturn Element
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1453
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1454 def start(self, tag, attrs):
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1455 self._flush()
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1456 self._last = elem = self._factory(tag, attrs)
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1457 if self._elem:
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1458 self._elem[-1].append(elem)
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1459 self._elem.append(elem)
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1460 self._tail = 0
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1461 return elem
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1462
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1463 ##
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1464 # Closes the current element.
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1465 #
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1466 # @param tag The element name.
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1467 # @return The closed element.
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1468 # @defreturn Element
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1469
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1470 def end(self, tag):
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1471 self._flush()
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1472 self._last = self._elem.pop()
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1473 assert self._last.tag == tag,\
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1474 "end tag mismatch (expected %s, got %s)" % (
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1475 self._last.tag, tag)
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1476 self._tail = 1
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1477 return self._last
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1478
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1479 ##
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1480 # Element structure builder for XML source data, based on the
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diff changeset
1481 # <b>expat</b> parser.
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parents:
diff changeset
1482 #
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1483 # @keyparam target Target object. If omitted, the builder uses an
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1484 # instance of the standard {@link #TreeBuilder} class.
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1485 # @keyparam html Predefine HTML entities. This flag is not supported
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1486 # by the current implementation.
59601
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1487 # @keyparam encoding Optional encoding. If given, the value overrides
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1488 # the encoding specified in the XML file.
39442
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1489 # @see #ElementTree
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1490 # @see #TreeBuilder
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1491
59601
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1492 class XMLParser:
39442
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1493
59601
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1494 def __init__(self, html=0, target=None, encoding=None):
39442
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1495 try:
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1496 from xml.parsers import expat
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1497 except ImportError:
59601
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1498 try:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1499 import pyexpat as expat
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1500 except ImportError:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1501 raise ImportError(
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1502 "No module named expat; use SimpleXMLTreeBuilder instead"
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1503 )
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1504 parser = expat.ParserCreate(encoding, "}")
39442
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1505 if target is None:
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1506 target = TreeBuilder()
59601
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1507 # underscored names are provided for compatibility only
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1508 self.parser = self._parser = parser
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1509 self.target = self._target = target
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1510 self._error = expat.error
39442
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1511 self._names = {} # name memo cache
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1512 # callbacks
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1513 parser.DefaultHandlerExpand = self._default
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1514 parser.StartElementHandler = self._start
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1515 parser.EndElementHandler = self._end
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1516 parser.CharacterDataHandler = self._data
59601
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1517 # optional callbacks
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1518 parser.CommentHandler = self._comment
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1519 parser.ProcessingInstructionHandler = self._pi
39442
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1520 # let expat do the buffering, if supported
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1521 try:
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1522 self._parser.buffer_text = 1
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1523 except AttributeError:
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1524 pass
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1525 # use new-style attribute handling, if supported
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1526 try:
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1527 self._parser.ordered_attributes = 1
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1528 self._parser.specified_attributes = 1
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1529 parser.StartElementHandler = self._start_list
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1530 except AttributeError:
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1531 pass
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1532 self._doctype = None
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1533 self.entity = {}
59601
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1534 try:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1535 self.version = "Expat %d.%d.%d" % expat.version_info
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1536 except AttributeError:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1537 pass # unknown
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1538
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1539 def _raiseerror(self, value):
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1540 err = ParseError(value)
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1541 err.code = value.code
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1542 err.position = value.lineno, value.offset
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1543 raise err
39442
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1544
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1545 def _fixname(self, key):
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1546 # expand qname, and convert name string to ascii, if possible
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1547 try:
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1548 name = self._names[key]
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1549 except KeyError:
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1550 name = key
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1551 if "}" in name:
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1552 name = "{" + name
42388
d3471ef6fe38 Patch #1762412: Fix test case for struni branch.
Martin v. Löwis <martin@v.loewis.de>
parents: 41501
diff changeset
1553 self._names[key] = name
39442
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1554 return name
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1555
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1556 def _start(self, tag, attrib_in):
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1557 fixname = self._fixname
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1558 tag = fixname(tag)
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1559 attrib = {}
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1560 for key, value in attrib_in.items():
42388
d3471ef6fe38 Patch #1762412: Fix test case for struni branch.
Martin v. Löwis <martin@v.loewis.de>
parents: 41501
diff changeset
1561 attrib[fixname(key)] = value
59601
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1562 return self.target.start(tag, attrib)
39442
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1563
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1564 def _start_list(self, tag, attrib_in):
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1565 fixname = self._fixname
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1566 tag = fixname(tag)
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1567 attrib = {}
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1568 if attrib_in:
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1569 for i in range(0, len(attrib_in), 2):
42388
d3471ef6fe38 Patch #1762412: Fix test case for struni branch.
Martin v. Löwis <martin@v.loewis.de>
parents: 41501
diff changeset
1570 attrib[fixname(attrib_in[i])] = attrib_in[i+1]
59601
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1571 return self.target.start(tag, attrib)
39442
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1572
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1573 def _data(self, text):
59601
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1574 return self.target.data(text)
39442
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1575
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1576 def _end(self, tag):
59601
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1577 return self.target.end(self._fixname(tag))
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1578
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1579 def _comment(self, data):
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1580 try:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1581 comment = self.target.comment
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1582 except AttributeError:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1583 pass
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1584 else:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1585 return comment(data)
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1586
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1587 def _pi(self, target, data):
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1588 try:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1589 pi = self.target.pi
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1590 except AttributeError:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1591 pass
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1592 else:
7a18c2762886 Merged revisions 78838-78839,78917,78919,78934,78937 via svnmerge from
Florent Xicluna <florent.xicluna@gmail.com>
parents: 58849
diff changeset
1593 return pi(target, data)
39442
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1594
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1595 def _default(self, text):
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1596 prefix = text[:1]
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1597 if prefix == "&":
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1598 # deal with undefined entities
654c380cf8b9 Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
diff changeset
1599 try:
59601
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1600 self.target.data(self.entity[text[1:-1]])
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1601 except KeyError:
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1602 from xml.parsers import expat
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1603 err = expat.error(
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1604 "undefined entity %s: line %d, column %d" %
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1605 (text, self._parser.ErrorLineNumber,
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1606 self._parser.ErrorColumnNumber)
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1607 )
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1608 err.code = 11 # XML_ERROR_UNDEFINED_ENTITY
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1609 err.lineno = self._parser.ErrorLineNumber
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1610 err.offset = self._parser.ErrorColumnNumber
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1611 raise err
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1612 elif prefix == "<" and text[:9] == "<!DOCTYPE":
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1613 self._doctype = [] # inside a doctype declaration
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1614 elif self._doctype is not None:
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1615 # parse doctype contents
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1616 if prefix == ">":
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1617 self._doctype = None
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1618 return
41480
99027c2b3fd2 Remove functions in string module that are also string methods. Also remove:
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1619 text = text.strip()
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1620 if not text:
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1621 return
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1622 self._doctype.append(text)
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1623 n = len(self._doctype)
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1624 if n > 2:
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1625 type = self._doctype[1]
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1626 if type == "PUBLIC" and n == 4:
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1627 name, type, pubid, system = self._doctype
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1628 elif type == "SYSTEM" and n == 3:
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1629 name, type, system = self._doctype
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1630 pubid = None
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1631 else:
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1632 return
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1633 if pubid:
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1634 pubid = pubid[1:-1]
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1635 if hasattr(self.target, "doctype"):
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1636 self.target.doctype(name, pubid, system[1:-1])
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1637 elif self.doctype is not self._XMLParser__doctype:
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1638 # warn about deprecated call
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1639 self._XMLParser__doctype(name, pubid, system[1:-1])
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1640 self.doctype(name, pubid, system[1:-1])
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1641 self._doctype = None
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1642
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1643 ##
59601
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1644 # (Deprecated) Handles a doctype declaration.
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1645 #
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1646 # @param name Doctype name.
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1647 # @param pubid Public identifier.
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1648 # @param system System identifier.
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1649
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1650 def doctype(self, name, pubid, system):
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1651 """This method of XMLParser is deprecated."""
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1652 warnings.warn(
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1653 "This method of XMLParser is deprecated. Define doctype() "
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1654 "method on the TreeBuilder target.",
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1655 DeprecationWarning,
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1656 )
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1657
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1658 # sentinel, if doctype is redefined in a subclass
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1659 __doctype = doctype
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1660
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1661 ##
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1662 # Feeds data to the parser.
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1663 #
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1664 # @param data Encoded data.
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1665
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1666 def feed(self, data):
59601
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1667 try:
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1668 self._parser.Parse(data, 0)
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1669 except self._error as v:
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1670 self._raiseerror(v)
39442
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1671
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1672 ##
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1673 # Finishes feeding data to the parser.
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1674 #
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1675 # @return An element structure.
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1676 # @defreturn Element
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1677
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1678 def close(self):
59601
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1679 try:
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1680 self._parser.Parse("", 1) # end of data
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diff changeset
1681 except self._error as v:
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diff changeset
1682 self._raiseerror(v)
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1683 tree = self.target.close()
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diff changeset
1684 del self.target, self._parser # get rid of circular references
39442
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1685 return tree
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1686
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1687 # compatibility
59601
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diff changeset
1688 XMLTreeBuilder = XMLParser
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1689
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diff changeset
1690 # workaround circular import.
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1691 try:
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1692 from ElementC14N import _serialize_c14n
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1693 _serialize["c14n"] = _serialize_c14n
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diff changeset
1694 except ImportError:
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1695 pass