Mercurial > traipse_dev
annotate orpg/xmltramp.py @ 23:551cd440acce traipse_dev
Final Dev build of the Day. Should reduce RAM usage more.
author | sirebral |
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date | Sat, 25 Jul 2009 21:05:18 -0500 |
parents | 4385a7d0efd1 |
children | c88a794d9a22 |
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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('&', '&').replace('<', '<').replace(']]>', ']]>') |
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17 if not elt: x = x.replace('"', '"') |
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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: return inprefixes[name[0]]+':'+name[1] |
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41 else: return name[1] |
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42 else: return name |
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43 |
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44 def arep(a, inprefixes, addns=1): |
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45 out = '' |
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46 for p in self._prefixes.keys(): |
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47 if not p in inprefixes.keys(): |
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48 if addns: out += ' xmlns' |
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49 if addns and self._prefixes[p]: out += ':'+self._prefixes[p] |
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50 if addns: out += '="'+quote(p, False)+'"' |
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51 inprefixes[p] = self._prefixes[p] |
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52 for k in a.keys(): |
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53 out += ' ' + qname(k, inprefixes)+ '="' + quote(a[k], False) + '"' |
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54 return out |
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55 inprefixes = inprefixes or {u'http://www.w3.org/XML/1998/namespace':'xml'} |
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56 |
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57 # need to call first to set inprefixes: |
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58 attributes = arep(self._attrs, inprefixes, recursive) |
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59 out = '<' + qname(self._name, inprefixes) + attributes |
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60 if not self._dir and (self._name[0] in empty.keys() |
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61 and self._name[1] in empty[self._name[0]]): |
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62 out += ' />' |
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63 return out |
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64 out += '>' |
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65 if recursive: |
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66 content = 0 |
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67 for x in self._dir: if isinstance(x, Element): content = 1 |
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68 pad = '\n' + ('\t' * recursive) |
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69 for x in self._dir: |
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70 if multiline and content: out += pad |
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71 if isstr(x): out += quote(x) |
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72 elif isinstance(x, Element): out += x.__repr__(recursive+1, multiline, inprefixes.copy()) |
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73 else: raise TypeError, "I wasn't expecting "+`x`+"." |
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74 if multiline and content: out += '\n' + ('\t' * (recursive-1)) |
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75 else: if self._dir: out += '...' |
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76 out += '</'+qname(self._name, inprefixes)+'>' |
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77 return out |
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78 |
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79 def __unicode__(self): |
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80 text = '' |
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81 for x in self._dir: text += unicode(x) |
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82 return ' '.join(text.split()) |
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83 |
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84 def __str__(self): |
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85 return self.__unicode__().encode('utf-8') |
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86 |
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87 def __getattr__(self, n): |
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88 if n[0] == '_': raise AttributeError, "Use foo['"+n+"'] to access the child element." |
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89 if self._dNS: n = (self._dNS, n) |
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90 for x in self._dir: |
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91 if isinstance(x, Element) and x._name == n: return x |
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92 raise AttributeError, 'No child element named \''+n+"'" |
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93 |
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94 def __hasattr__(self, n): |
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95 for x in self._dir: |
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96 if isinstance(x, Element) and x._name == n: return True |
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97 return False |
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98 |
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99 def __setattr__(self, n, v): |
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100 if n[0] == '_': self.__dict__[n] = v |
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101 else: self[n] = v |
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102 |
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103 def __getitem__(self, n): |
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104 if isinstance(n, type(0)): # d[1] == d._dir[1] |
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105 return self._dir[n] |
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106 elif isinstance(n, slice(0).__class__): |
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107 # numerical slices |
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108 if isinstance(n.start, type(0)): return self._dir[n.start:n.stop] |
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109 # d['foo':] == all <foo>s |
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110 n = n.start |
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111 if self._dNS and not islst(n): n = (self._dNS, n) |
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112 out = [] |
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113 for x in self._dir: |
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114 if isinstance(x, Element) and x._name == n: out.append(x) |
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115 return out |
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116 else: # d['foo'] == first <foo> |
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117 if self._dNS and not islst(n): n = (self._dNS, n) |
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118 for x in self._dir: |
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119 if isinstance(x, Element) and x._name == n: return x |
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120 raise KeyError |
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121 |
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122 def __setitem__(self, n, v): |
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123 if isinstance(n, type(0)): # d[1] |
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124 self._dir[n] = v |
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125 elif isinstance(n, slice(0).__class__): |
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126 # d['foo':] adds a new foo |
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127 n = n.start |
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128 if self._dNS and not islst(n): n = (self._dNS, n) |
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129 nv = Element(n) |
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130 self._dir.append(nv) |
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131 |
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132 else: # d["foo"] replaces first <foo> and dels rest |
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133 if self._dNS and not islst(n): n = (self._dNS, n) |
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134 nv = Element(n); nv._dir.append(v) |
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135 replaced = False |
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136 todel = [] |
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137 for i in range(len(self)): |
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138 if self[i]._name == n: |
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139 if replaced: |
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140 todel.append(i) |
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141 else: |
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142 self[i] = nv |
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143 replaced = True |
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144 if not replaced: self._dir.append(nv) |
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145 for i in todel: del self[i] |
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146 |
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147 def __delitem__(self, n): |
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148 if isinstance(n, type(0)): del self._dir[n] |
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149 elif isinstance(n, slice(0).__class__): |
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150 # delete all <foo>s |
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151 n = n.start |
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152 if self._dNS and not islst(n): n = (self._dNS, n) |
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153 for i in range(len(self)): |
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154 if self[i]._name == n: del self[i] |
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155 else: |
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156 # delete first foo |
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157 for i in range(len(self)): |
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158 if self[i]._name == n: del self[i] |
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159 break |
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160 |
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161 def __call__(self, *_pos, **_set): |
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162 if _set: |
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163 for k in _set.keys(): self._attrs[k] = _set[k] |
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164 if len(_pos) > 1: |
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165 for i in range(0, len(_pos), 2): self._attrs[_pos[i]] = _pos[i+1] |
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166 if len(_pos) == 1 is not None: return self._attrs[_pos[0]] |
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167 if len(_pos) == 0: return self._attrs |
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168 |
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169 def __len__(self): return len(self._dir) |
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170 |
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171 class Namespace: |
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172 def __init__(self, uri): self.__uri = uri |
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173 def __getattr__(self, n): return (self.__uri, n) |
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174 def __getitem__(self, n): return (self.__uri, n) |
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175 |
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176 from xml.sax.handler import EntityResolver, DTDHandler, ContentHandler, ErrorHandler |
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177 |
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178 class Seeder(EntityResolver, DTDHandler, ContentHandler, ErrorHandler): |
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179 def __init__(self): |
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180 self.stack = [] |
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181 self.ch = '' |
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182 self.prefixes = {} |
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183 ContentHandler.__init__(self) |
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184 |
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185 def startPrefixMapping(self, prefix, uri): |
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186 if not self.prefixes.has_key(prefix): self.prefixes[prefix] = [] |
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187 self.prefixes[prefix].append(uri) |
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188 def endPrefixMapping(self, prefix): |
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189 self.prefixes[prefix].pop() |
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190 |
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191 def startElementNS(self, name, qname, attrs): |
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192 ch = self.ch; self.ch = '' |
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193 if ch and not ch.isspace(): self.stack[-1]._dir.append(ch) |
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194 attrs = dict(attrs) |
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195 newprefixes = {} |
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196 for k in self.prefixes.keys(): newprefixes[k] = self.prefixes[k][-1] |
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197 self.stack.append(Element(name, attrs, prefixes=newprefixes.copy())) |
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198 |
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199 def characters(self, ch): |
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200 self.ch += ch |
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201 |
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202 def endElementNS(self, name, qname): |
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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 element = self.stack.pop() |
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206 if self.stack: self.stack[-1]._dir.append(element) |
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207 else: self.result = element |
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208 |
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209 from xml.sax import make_parser |
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210 from xml.sax.handler import feature_namespaces |
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211 |
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212 def seed(fileobj): |
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213 seeder = Seeder() |
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214 parser = make_parser() |
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215 parser.setFeature(feature_namespaces, 1) |
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216 parser.setContentHandler(seeder) |
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217 parser.parse(fileobj) |
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218 return seeder.result |
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219 |
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220 def parse(text): |
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221 from StringIO import StringIO |
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222 return seed(StringIO(text)) |
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223 |
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224 def load(url): |
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225 import urllib |
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226 return seed(urllib.urlopen(url)) |
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227 |
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228 def unittest(): |
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229 parse('<doc>a<baz>f<b>o</b>ob<b>a</b>r</baz>a</doc>').__repr__(1,1) == \ |
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230 '<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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231 assert str(parse("<doc />")) == "" |
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232 assert str(parse("<doc>I <b>love</b> you.</doc>")) == "I love you." |
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233 assert parse("<doc>\nmom\nwow\n</doc>")[0].strip() == "mom\nwow" |
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234 assert str(parse('<bing> <bang> <bong>center</bong> </bang> </bing>')) == "center" |
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235 assert str(parse('<doc>\xcf\x80</doc>')) == '\xcf\x80' |
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236 d = Element('foo', attrs={'foo':'bar'}, children=['hit with a', Element('bar'), Element('bar')]) |
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237 |
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238 try: |
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239 d._doesnotexist |
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240 raise "ExpectedError", "but found success. Damn." |
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241 except AttributeError: pass |
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242 assert d.bar._name == 'bar' |
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243 try: |
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244 d.doesnotexist |
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245 raise "ExpectedError", "but found success. Damn." |
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246 except AttributeError: pass |
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247 assert hasattr(d, 'bar') == True |
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248 assert d('foo') == 'bar' |
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249 d(silly='yes') |
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250 assert d('silly') == 'yes' |
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251 assert d() == d._attrs |
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252 assert d[0] == 'hit with a' |
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253 d[0] = 'ice cream' |
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254 assert d[0] == 'ice cream' |
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255 del d[0] |
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256 assert d[0]._name == "bar" |
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257 assert len(d[:]) == len(d._dir) |
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258 assert len(d[1:]) == len(d._dir) - 1 |
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259 assert len(d['bar':]) == 2 |
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260 d['bar':] = 'baz' |
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261 assert len(d['bar':]) == 3 |
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262 assert d['bar']._name == 'bar' |
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263 d = Element('foo') |
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264 doc = Namespace("http://example.org/bar") |
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265 bbc = Namespace("http://example.org/bbc") |
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266 dc = Namespace("http://purl.org/dc/elements/1.1/") |
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267 d = parse("""<doc version="2.7182818284590451" |
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268 xmlns="http://example.org/bar" |
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269 xmlns:dc="http://purl.org/dc/elements/1.1/" |
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270 xmlns:bbc="http://example.org/bbc"> |
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271 <author>John Polk and John Palfrey</author> |
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272 <dc:creator>John Polk</dc:creator> |
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273 <dc:creator>John Palfrey</dc:creator> |
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274 <bbc:show bbc:station="4">Buffy</bbc:show> |
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275 </doc>""") |
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276 assert repr(d) == '<doc version="2.7182818284590451">...</doc>' |
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277 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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278 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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279 assert repr(parse("<doc xml:lang='en' />")) == '<doc xml:lang="en"></doc>' |
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280 assert str(d.author) == str(d['author']) == "John Polk and John Palfrey" |
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281 assert d.author._name == doc.author |
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282 assert str(d[dc.creator]) == "John Polk" |
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283 assert d[dc.creator]._name == dc.creator |
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284 assert str(d[dc.creator:][1]) == "John Palfrey" |
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285 d[dc.creator] = "Me!!!" |
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286 assert str(d[dc.creator]) == "Me!!!" |
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287 assert len(d[dc.creator:]) == 1 |
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288 d[dc.creator:] = "You!!!" |
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289 assert len(d[dc.creator:]) == 2 |
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290 assert d[bbc.show](bbc.station) == "4" |
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291 d[bbc.show](bbc.station, "5") |
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292 assert d[bbc.show](bbc.station) == "5" |
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293 e = Element('e') |
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294 e.c = '<img src="foo">' |
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295 assert e.__repr__(1) == '<e><c><img src="foo"></c></e>' |
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296 e.c = '2 > 4' |
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297 assert e.__repr__(1) == '<e><c>2 > 4</c></e>' |
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298 e.c = 'CDATA sections are <em>closed</em> with ]]>.' |
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299 assert e.__repr__(1) == '<e><c>CDATA sections are <em>closed</em> with ]]>.</c></e>' |
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300 e.c = parse('<div xmlns="http://www.w3.org/1999/xhtml">i<br /><span></span>love<br />you</div>') |
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301 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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302 e = Element('e') |
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303 e('c', 'that "sucks"') |
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304 assert e.__repr__(1) == '<e c="that "sucks""></e>' |
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305 assert quote("]]>") == "]]>" |
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306 assert quote('< dkdkdsd dkd sksdksdfsd fsdfdsf]]> kfdfkg >') == '< dkdkdsd dkd sksdksdfsd fsdfdsf]]> kfdfkg >' |
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307 assert parse('<x a="<"></x>').__repr__(1) == '<x a="<"></x>' |
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308 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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309 |
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310 if __name__ == '__main__': unittest() |