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annotate orpg/xmltramp.py @ 0:4385a7d0efd1 grumpy-goblin

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Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
author sirebral
date Tue, 14 Jul 2009 16:41:58 -0500
parents
children 551cd440acce
rev   line source
0
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1 """xmltramp: Make XML documents easily accessible."""
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2
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3 __version__ = "2.16"
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4 __author__ = "Aaron Swartz"
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5 __credits__ = "Many thanks to pjz, bitsko, and DanC."
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6 __copyright__ = "(C) 2003 Aaron Swartz. GNU GPL 2."
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7
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8 if not hasattr(__builtins__, 'True'): True, False = 1, 0
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9 def isstr(f): return isinstance(f, type('')) or isinstance(f, type(u''))
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10 def islst(f): return isinstance(f, type(())) or isinstance(f, type([]))
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11
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12 empty = {'http://www.w3.org/1999/xhtml': ['img', 'br', 'hr', 'meta', 'link', 'base', 'param', 'input', 'col', 'area']}
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13
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14 def quote(x, elt=True):
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15 if elt and '<' in x and len(x) > 24 and x.find(']]>') == -1: return "<![CDATA["+x+"]]>"
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16 else: x = x.replace('&', '&amp;').replace('<', '&lt;').replace(']]>', ']]&gt;')
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17 if not elt: x = x.replace('"', '&quot;')
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18 return x
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19
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20 class Element:
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21 def __init__(self, name, attrs=None, children=None, prefixes=None):
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22 if islst(name) and name[0] == None: name = name[1]
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23 if attrs:
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24 na = {}
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25 for k in attrs.keys():
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26 if islst(k) and k[0] == None: na[k[1]] = attrs[k]
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27 else: na[k] = attrs[k]
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28 attrs = na
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29 self._name = name
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30 self._attrs = attrs or {}
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31 self._dir = children or []
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32 prefixes = prefixes or {}
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33 self._prefixes = dict(zip(prefixes.values(), prefixes.keys()))
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34 if prefixes: self._dNS = prefixes.get(None, None)
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35 else: self._dNS = None
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36
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37 def __repr__(self, recursive=0, multiline=0, inprefixes=None):
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38 def qname(name, inprefixes):
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39 if islst(name):
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40 if inprefixes[name[0]] is not None:
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41 return inprefixes[name[0]]+':'+name[1]
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42 else:
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43 return name[1]
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44 else:
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45 return name
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46
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47 def arep(a, inprefixes, addns=1):
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48 out = ''
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49 for p in self._prefixes.keys():
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50 if not p in inprefixes.keys():
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51 if addns: out += ' xmlns'
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52 if addns and self._prefixes[p]: out += ':'+self._prefixes[p]
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53 if addns: out += '="'+quote(p, False)+'"'
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54 inprefixes[p] = self._prefixes[p]
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55 for k in a.keys():
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56 out += ' ' + qname(k, inprefixes)+ '="' + quote(a[k], False) + '"'
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57 return out
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58 inprefixes = inprefixes or {u'http://www.w3.org/XML/1998/namespace':'xml'}
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59
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60 # need to call first to set inprefixes:
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61 attributes = arep(self._attrs, inprefixes, recursive)
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62 out = '<' + qname(self._name, inprefixes) + attributes
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63 if not self._dir and (self._name[0] in empty.keys()
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64 and self._name[1] in empty[self._name[0]]):
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65 out += ' />'
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66 return out
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67 out += '>'
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68 if recursive:
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69 content = 0
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70 for x in self._dir:
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71 if isinstance(x, Element): content = 1
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72 pad = '\n' + ('\t' * recursive)
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73 for x in self._dir:
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74 if multiline and content: out += pad
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75 if isstr(x): out += quote(x)
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76 elif isinstance(x, Element):
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77 out += x.__repr__(recursive+1, multiline, inprefixes.copy())
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78 else:
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79 raise TypeError, "I wasn't expecting "+`x`+"."
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80 if multiline and content: out += '\n' + ('\t' * (recursive-1))
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81 else:
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82 if self._dir: out += '...'
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83 out += '</'+qname(self._name, inprefixes)+'>'
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84 return out
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85
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86 def __unicode__(self):
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87 text = ''
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88 for x in self._dir:
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89 text += unicode(x)
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90 return ' '.join(text.split())
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91
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92 def __str__(self):
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93 return self.__unicode__().encode('utf-8')
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94
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95 def __getattr__(self, n):
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96 if n[0] == '_': raise AttributeError, "Use foo['"+n+"'] to access the child element."
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97 if self._dNS: n = (self._dNS, n)
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98 for x in self._dir:
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99 if isinstance(x, Element) and x._name == n: return x
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100 raise AttributeError, 'No child element named \''+n+"'"
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101
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102 def __hasattr__(self, n):
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103 for x in self._dir:
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104 if isinstance(x, Element) and x._name == n: return True
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105 return False
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106
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107 def __setattr__(self, n, v):
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108 if n[0] == '_': self.__dict__[n] = v
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109 else: self[n] = v
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110
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111 def __getitem__(self, n):
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112 if isinstance(n, type(0)): # d[1] == d._dir[1]
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113 return self._dir[n]
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114 elif isinstance(n, slice(0).__class__):
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115 # numerical slices
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116 if isinstance(n.start, type(0)): return self._dir[n.start:n.stop]
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117 # d['foo':] == all <foo>s
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118 n = n.start
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119 if self._dNS and not islst(n): n = (self._dNS, n)
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120 out = []
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121 for x in self._dir:
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122 if isinstance(x, Element) and x._name == n: out.append(x)
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123 return out
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124 else: # d['foo'] == first <foo>
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125 if self._dNS and not islst(n): n = (self._dNS, n)
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126 for x in self._dir:
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127 if isinstance(x, Element) and x._name == n: return x
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128 raise KeyError
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129
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130 def __setitem__(self, n, v):
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131 if isinstance(n, type(0)): # d[1]
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132 self._dir[n] = v
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133 elif isinstance(n, slice(0).__class__):
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134 # d['foo':] adds a new foo
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135 n = n.start
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136 if self._dNS and not islst(n): n = (self._dNS, n)
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137 nv = Element(n)
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138 self._dir.append(nv)
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139
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140 else: # d["foo"] replaces first <foo> and dels rest
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141 if self._dNS and not islst(n): n = (self._dNS, n)
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142 nv = Element(n); nv._dir.append(v)
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143 replaced = False
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144 todel = []
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145 for i in range(len(self)):
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146 if self[i]._name == n:
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147 if replaced:
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148 todel.append(i)
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149 else:
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150 self[i] = nv
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151 replaced = True
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152 if not replaced: self._dir.append(nv)
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153 for i in todel: del self[i]
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154
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155 def __delitem__(self, n):
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156 if isinstance(n, type(0)): del self._dir[n]
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157 elif isinstance(n, slice(0).__class__):
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158 # delete all <foo>s
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159 n = n.start
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160 if self._dNS and not islst(n): n = (self._dNS, n)
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161 for i in range(len(self)):
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162 if self[i]._name == n: del self[i]
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163 else:
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164 # delete first foo
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165 for i in range(len(self)):
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166 if self[i]._name == n: del self[i]
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167 break
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168
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169 def __call__(self, *_pos, **_set):
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170 if _set:
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171 for k in _set.keys(): self._attrs[k] = _set[k]
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172 if len(_pos) > 1:
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173 for i in range(0, len(_pos), 2):
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174 self._attrs[_pos[i]] = _pos[i+1]
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175 if len(_pos) == 1 is not None:
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176 return self._attrs[_pos[0]]
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177 if len(_pos) == 0:
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178 return self._attrs
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179
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180 def __len__(self): return len(self._dir)
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181
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182 class Namespace:
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183 def __init__(self, uri): self.__uri = uri
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184 def __getattr__(self, n): return (self.__uri, n)
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185 def __getitem__(self, n): return (self.__uri, n)
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186
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187 from xml.sax.handler import EntityResolver, DTDHandler, ContentHandler, ErrorHandler
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188
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189 class Seeder(EntityResolver, DTDHandler, ContentHandler, ErrorHandler):
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190 def __init__(self):
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191 self.stack = []
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192 self.ch = ''
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193 self.prefixes = {}
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194 ContentHandler.__init__(self)
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195
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196 def startPrefixMapping(self, prefix, uri):
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197 if not self.prefixes.has_key(prefix): self.prefixes[prefix] = []
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198 self.prefixes[prefix].append(uri)
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199 def endPrefixMapping(self, prefix):
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200 self.prefixes[prefix].pop()
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201
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202 def startElementNS(self, name, qname, attrs):
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203 ch = self.ch; self.ch = ''
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204 if ch and not ch.isspace(): self.stack[-1]._dir.append(ch)
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205 attrs = dict(attrs)
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206 newprefixes = {}
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207 for k in self.prefixes.keys(): newprefixes[k] = self.prefixes[k][-1]
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208 self.stack.append(Element(name, attrs, prefixes=newprefixes.copy()))
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209
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210 def characters(self, ch):
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211 self.ch += ch
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212
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213 def endElementNS(self, name, qname):
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214 ch = self.ch; self.ch = ''
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215 if ch and not ch.isspace(): self.stack[-1]._dir.append(ch)
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216 element = self.stack.pop()
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217 if self.stack:
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218 self.stack[-1]._dir.append(element)
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219 else:
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220 self.result = element
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221
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222 from xml.sax import make_parser
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223 from xml.sax.handler import feature_namespaces
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224
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225 def seed(fileobj):
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226 seeder = Seeder()
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227 parser = make_parser()
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228 parser.setFeature(feature_namespaces, 1)
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229 parser.setContentHandler(seeder)
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230 parser.parse(fileobj)
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diff changeset
231 return seeder.result
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232
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233 def parse(text):
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234 from StringIO import StringIO
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diff changeset
235 return seed(StringIO(text))
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236
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diff changeset
237 def load(url):
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diff changeset
238 import urllib
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239 return seed(urllib.urlopen(url))
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240
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241 def unittest():
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242 parse('<doc>a<baz>f<b>o</b>ob<b>a</b>r</baz>a</doc>').__repr__(1,1) == \
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243 '<doc>\n\ta<baz>\n\t\tf<b>o</b>ob<b>a</b>r\n\t</baz>a\n</doc>'
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diff changeset
244 assert str(parse("<doc />")) == ""
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245 assert str(parse("<doc>I <b>love</b> you.</doc>")) == "I love you."
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246 assert parse("<doc>\nmom\nwow\n</doc>")[0].strip() == "mom\nwow"
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247 assert str(parse('<bing> <bang> <bong>center</bong> </bang> </bing>')) == "center"
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248 assert str(parse('<doc>\xcf\x80</doc>')) == '\xcf\x80'
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249 d = Element('foo', attrs={'foo':'bar'}, children=['hit with a', Element('bar'), Element('bar')])
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250
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251 try:
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252 d._doesnotexist
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diff changeset
253 raise "ExpectedError", "but found success. Damn."
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254 except AttributeError: pass
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255 assert d.bar._name == 'bar'
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diff changeset
256 try:
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diff changeset
257 d.doesnotexist
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diff changeset
258 raise "ExpectedError", "but found success. Damn."
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diff changeset
259 except AttributeError: pass
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260 assert hasattr(d, 'bar') == True
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diff changeset
261 assert d('foo') == 'bar'
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262 d(silly='yes')
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diff changeset
263 assert d('silly') == 'yes'
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264 assert d() == d._attrs
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265 assert d[0] == 'hit with a'
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266 d[0] = 'ice cream'
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267 assert d[0] == 'ice cream'
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268 del d[0]
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269 assert d[0]._name == "bar"
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270 assert len(d[:]) == len(d._dir)
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271 assert len(d[1:]) == len(d._dir) - 1
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272 assert len(d['bar':]) == 2
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273 d['bar':] = 'baz'
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274 assert len(d['bar':]) == 3
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275 assert d['bar']._name == 'bar'
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276 d = Element('foo')
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277 doc = Namespace("http://example.org/bar")
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278 bbc = Namespace("http://example.org/bbc")
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279 dc = Namespace("http://purl.org/dc/elements/1.1/")
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280 d = parse("""<doc version="2.7182818284590451"
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281 xmlns="http://example.org/bar"
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282 xmlns:dc="http://purl.org/dc/elements/1.1/"
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283 xmlns:bbc="http://example.org/bbc">
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284 <author>John Polk and John Palfrey</author>
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285 <dc:creator>John Polk</dc:creator>
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286 <dc:creator>John Palfrey</dc:creator>
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287 <bbc:show bbc:station="4">Buffy</bbc:show>
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288 </doc>""")
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289 assert repr(d) == '<doc version="2.7182818284590451">...</doc>'
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290 assert d.__repr__(1) == '<doc xmlns:bbc="http://example.org/bbc" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns="http://example.org/bar" version="2.7182818284590451"><author>John Polk and John Palfrey</author><dc:creator>John Polk</dc:creator><dc:creator>John Palfrey</dc:creator><bbc:show bbc:station="4">Buffy</bbc:show></doc>'
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291 assert d.__repr__(1,1) == '<doc xmlns:bbc="http://example.org/bbc" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns="http://example.org/bar" version="2.7182818284590451">\n\t<author>John Polk and John Palfrey</author>\n\t<dc:creator>John Polk</dc:creator>\n\t<dc:creator>John Palfrey</dc:creator>\n\t<bbc:show bbc:station="4">Buffy</bbc:show>\n</doc>'
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292 assert repr(parse("<doc xml:lang='en' />")) == '<doc xml:lang="en"></doc>'
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293 assert str(d.author) == str(d['author']) == "John Polk and John Palfrey"
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294 assert d.author._name == doc.author
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295 assert str(d[dc.creator]) == "John Polk"
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296 assert d[dc.creator]._name == dc.creator
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297 assert str(d[dc.creator:][1]) == "John Palfrey"
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298 d[dc.creator] = "Me!!!"
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299 assert str(d[dc.creator]) == "Me!!!"
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300 assert len(d[dc.creator:]) == 1
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301 d[dc.creator:] = "You!!!"
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302 assert len(d[dc.creator:]) == 2
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303 assert d[bbc.show](bbc.station) == "4"
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304 d[bbc.show](bbc.station, "5")
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305 assert d[bbc.show](bbc.station) == "5"
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306 e = Element('e')
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307 e.c = '<img src="foo">'
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308 assert e.__repr__(1) == '<e><c>&lt;img src="foo"></c></e>'
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309 e.c = '2 > 4'
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310 assert e.__repr__(1) == '<e><c>2 > 4</c></e>'
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311 e.c = 'CDATA sections are <em>closed</em> with ]]>.'
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312 assert e.__repr__(1) == '<e><c>CDATA sections are &lt;em>closed&lt;/em> with ]]&gt;.</c></e>'
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313 e.c = parse('<div xmlns="http://www.w3.org/1999/xhtml">i<br /><span></span>love<br />you</div>')
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314 assert e.__repr__(1) == '<e><c><div xmlns="http://www.w3.org/1999/xhtml">i<br /><span></span>love<br />you</div></c></e>'
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315 e = Element('e')
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316 e('c', 'that "sucks"')
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317 assert e.__repr__(1) == '<e c="that &quot;sucks&quot;"></e>'
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318 assert quote("]]>") == "]]&gt;"
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319 assert quote('< dkdkdsd dkd sksdksdfsd fsdfdsf]]> kfdfkg >') == '&lt; dkdkdsd dkd sksdksdfsd fsdfdsf]]&gt; kfdfkg >'
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320 assert parse('<x a="&lt;"></x>').__repr__(1) == '<x a="&lt;"></x>'
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321 assert parse('<a xmlns="http://a"><b xmlns="http://b"/></a>').__repr__(1) == '<a xmlns="http://a"><b xmlns="http://b"></b></a>'
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322
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323 if __name__ == '__main__': unittest()