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  42.         Module&nbsp;tagger
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  51.             >[<a href="frames.html" target="_top">frames</a
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  53.             target="_top">no&nbsp;frames</a>]</span></td></tr>
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    58. 

  58. <h1 class="epydoc">Source Code for <a href="tagger-module.html">Module tagger</a></h1>
    59. 

  59. <pre class="py-src">
    60. 

  60. <a name="L1"></a><tt class="py-lineno">  1</tt>  <tt class="py-line"><tt class="py-comment">#!/usr/bin/env python</tt> </tt>
    61. 

  61. <a name="L2"></a><tt class="py-lineno">  2</tt>  <tt class="py-line"><tt class="py-comment"># -*- coding: utf-8 -*-</tt> </tt>
    62. 

  62. <a name="L3"></a><tt class="py-lineno">  3</tt>  <tt class="py-line"> </tt>
    63. 

  63. <a name="L4"></a><tt class="py-lineno">  4</tt>  <tt class="py-line"><tt class="py-comment"># Copyright (C) 2011 by Alessandro Presta</tt> </tt>
    64. 

  64. <a name="L5"></a><tt class="py-lineno">  5</tt>  <tt class="py-line"> </tt>
    65. 

  65. <a name="L6"></a><tt class="py-lineno">  6</tt>  <tt class="py-line"><tt class="py-comment"># Permission is hereby granted, free of charge, to any person obtaining a copy</tt> </tt>
    66. 

  66. <a name="L7"></a><tt class="py-lineno">  7</tt>  <tt class="py-line"><tt class="py-comment"># of this software and associated documentation files (the "Software"), to deal</tt> </tt>
    67. 

  67. <a name="L8"></a><tt class="py-lineno">  8</tt>  <tt class="py-line"><tt class="py-comment"># in the Software without restriction, including without limitation the rights</tt> </tt>
    68. 

  68. <a name="L9"></a><tt class="py-lineno">  9</tt>  <tt class="py-line"><tt class="py-comment"># to use, copy, modify, merge, publish, distribute, sublicense, and/or sell</tt> </tt>
    69. 

  69. <a name="L10"></a><tt class="py-lineno"> 10</tt>  <tt class="py-line"><tt class="py-comment"># copies of the Software, and to permit persons to whom the Software is</tt> </tt>
    70. 

  70. <a name="L11"></a><tt class="py-lineno"> 11</tt>  <tt class="py-line"><tt class="py-comment"># furnished to do so, subject to the following conditions:</tt> </tt>
    71. 

  71. <a name="L12"></a><tt class="py-lineno"> 12</tt>  <tt class="py-line"> </tt>
    72. 

  72. <a name="L13"></a><tt class="py-lineno"> 13</tt>  <tt class="py-line"><tt class="py-comment"># The above copyright notice and this permission notice shall be included in</tt> </tt>
    73. 

  73. <a name="L14"></a><tt class="py-lineno"> 14</tt>  <tt class="py-line"><tt class="py-comment"># all copies or substantial portions of the Software.</tt> </tt>
    74. 

  74. <a name="L15"></a><tt class="py-lineno"> 15</tt>  <tt class="py-line"> </tt>
    75. 

  75. <a name="L16"></a><tt class="py-lineno"> 16</tt>  <tt class="py-line"><tt class="py-comment"># THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR</tt> </tt>
    76. 

  76. <a name="L17"></a><tt class="py-lineno"> 17</tt>  <tt class="py-line"><tt class="py-comment"># IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,</tt> </tt>
    77. 

  77. <a name="L18"></a><tt class="py-lineno"> 18</tt>  <tt class="py-line"><tt class="py-comment"># FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE</tt> </tt>
    78. 

  78. <a name="L19"></a><tt class="py-lineno"> 19</tt>  <tt class="py-line"><tt class="py-comment"># AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER</tt> </tt>
    79. 

  79. <a name="L20"></a><tt class="py-lineno"> 20</tt>  <tt class="py-line"><tt class="py-comment"># LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,</tt> </tt>
    80. 

  80. <a name="L21"></a><tt class="py-lineno"> 21</tt>  <tt class="py-line"><tt class="py-comment"># OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN</tt> </tt>
    81. 

  81. <a name="L22"></a><tt class="py-lineno"> 22</tt>  <tt class="py-line"><tt class="py-comment"># THE SOFTWARE</tt> </tt>
    82. 

  82. <a name="L23"></a><tt class="py-lineno"> 23</tt>  <tt class="py-line"> </tt>
    83. 

  83. <a name="L24"></a><tt class="py-lineno"> 24</tt>  <tt class="py-line"> </tt>
    84. 

  84. <a name="L25"></a><tt class="py-lineno"> 25</tt>  <tt class="py-line"><tt class="py-docstring">'''</tt> </tt>
    85. 

  85. <a name="L26"></a><tt class="py-lineno"> 26</tt>  <tt class="py-line"><tt class="py-docstring">======</tt> </tt>
    86. 

  86. <a name="L27"></a><tt class="py-lineno"> 27</tt>  <tt class="py-line"><tt class="py-docstring">tagger</tt> </tt>
    87. 

  87. <a name="L28"></a><tt class="py-lineno"> 28</tt>  <tt class="py-line"><tt class="py-docstring">======</tt> </tt>
    88. 

  88. <a name="L29"></a><tt class="py-lineno"> 29</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
    89. 

  89. <a name="L30"></a><tt class="py-lineno"> 30</tt>  <tt class="py-line"><tt class="py-docstring">Module for extracting tags from text documents.</tt> </tt>
    90. 

  90. <a name="L31"></a><tt class="py-lineno"> 31</tt>  <tt class="py-line"><tt class="py-docstring">                   </tt> </tt>
    91. 

  91. <a name="L32"></a><tt class="py-lineno"> 32</tt>  <tt class="py-line"><tt class="py-docstring">Copyright (C) 2011 by Alessandro Presta</tt> </tt>
    92. 

  92. <a name="L33"></a><tt class="py-lineno"> 33</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
    93. 

  93. <a name="L34"></a><tt class="py-lineno"> 34</tt>  <tt class="py-line"><tt class="py-docstring">Configuration</tt> </tt>
    94. 

  94. <a name="L35"></a><tt class="py-lineno"> 35</tt>  <tt class="py-line"><tt class="py-docstring">=============</tt> </tt>
    95. 

  95. <a name="L36"></a><tt class="py-lineno"> 36</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
    96. 

  96. <a name="L37"></a><tt class="py-lineno"> 37</tt>  <tt class="py-line"><tt class="py-docstring">Dependencies:</tt> </tt>
    97. 

  97. <a name="L38"></a><tt class="py-lineno"> 38</tt>  <tt class="py-line"><tt class="py-docstring">python2.7, stemming, nltk (optional), lxml (optional), tkinter (optional)</tt> </tt>
    98. 

  98. <a name="L39"></a><tt class="py-lineno"> 39</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
    99. 

  99. <a name="L40"></a><tt class="py-lineno"> 40</tt>  <tt class="py-line"><tt class="py-docstring">You can install the stemming package with::</tt> </tt>
    100. 

  100. <a name="L41"></a><tt class="py-lineno"> 41</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
    101. 

  101. <a name="L42"></a><tt class="py-lineno"> 42</tt>  <tt class="py-line"><tt class="py-docstring">    $ easy_install stemming</tt> </tt>
    102. 

  102. <a name="L43"></a><tt class="py-lineno"> 43</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
    103. 

  103. <a name="L44"></a><tt class="py-lineno"> 44</tt>  <tt class="py-line"><tt class="py-docstring">Usage</tt> </tt>
    104. 

  104. <a name="L45"></a><tt class="py-lineno"> 45</tt>  <tt class="py-line"><tt class="py-docstring">=====</tt> </tt>
    105. 

  105. <a name="L46"></a><tt class="py-lineno"> 46</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
    106. 

  106. <a name="L47"></a><tt class="py-lineno"> 47</tt>  <tt class="py-line"><tt class="py-docstring">Tagging a text document from Python::</tt> </tt>
    107. 

  107. <a name="L48"></a><tt class="py-lineno"> 48</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
    108. 

  108. <a name="L49"></a><tt class="py-lineno"> 49</tt>  <tt class="py-line"><tt class="py-docstring">    import tagger</tt> </tt>
    109. 

  109. <a name="L50"></a><tt class="py-lineno"> 50</tt>  <tt class="py-line"><tt class="py-docstring">    weights = pickle.load(open('data/dict.pkl', 'rb')) # or your own dictionary</tt> </tt>
    110. 

  110. <a name="L51"></a><tt class="py-lineno"> 51</tt>  <tt class="py-line"><tt class="py-docstring">    myreader = tagger.Reader() # or your own reader class</tt> </tt>
    111. 

  111. <a name="L52"></a><tt class="py-lineno"> 52</tt>  <tt class="py-line"><tt class="py-docstring">    mystemmer = tagger.Stemmer() # or your own stemmer class</tt> </tt>
    112. 

  112. <a name="L53"></a><tt class="py-lineno"> 53</tt>  <tt class="py-line"><tt class="py-docstring">    myrater = tagger.Rater(weights) # or your own... (you got the idea)</tt> </tt>
    113. 

  113. <a name="L54"></a><tt class="py-lineno"> 54</tt>  <tt class="py-line"><tt class="py-docstring">    mytagger = Tagger(myreader, mystemmer, myrater)</tt> </tt>
    114. 

  114. <a name="L55"></a><tt class="py-lineno"> 55</tt>  <tt class="py-line"><tt class="py-docstring">    best_3_tags = mytagger(text_string, 3)</tt> </tt>
    115. 

  115. <a name="L56"></a><tt class="py-lineno"> 56</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
    116. 

  116. <a name="L57"></a><tt class="py-lineno"> 57</tt>  <tt class="py-line"><tt class="py-docstring">Running the module as a script::</tt> </tt>
    117. 

  117. <a name="L58"></a><tt class="py-lineno"> 58</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
    118. 

  118. <a name="L59"></a><tt class="py-lineno"> 59</tt>  <tt class="py-line"><tt class="py-docstring">    $ ./tagger.py &lt;text document(s) to tag&gt;</tt> </tt>
    119. 

  119. <a name="L60"></a><tt class="py-lineno"> 60</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
    120. 

  120. <a name="L61"></a><tt class="py-lineno"> 61</tt>  <tt class="py-line"><tt class="py-docstring">Example::</tt> </tt>
    121. 

  121. <a name="L62"></a><tt class="py-lineno"> 62</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
    122. 

  122. <a name="L63"></a><tt class="py-lineno"> 63</tt>  <tt class="py-line"><tt class="py-docstring">    $ ./tagger.py tests/*</tt> </tt>
    123. 

  123. <a name="L64"></a><tt class="py-lineno"> 64</tt>  <tt class="py-line"><tt class="py-docstring">    Loading dictionary... </tt> </tt>
    124. 

  124. <a name="L65"></a><tt class="py-lineno"> 65</tt>  <tt class="py-line"><tt class="py-docstring">    Tags for  tests/bbc1.txt :</tt> </tt>
    125. 

  125. <a name="L66"></a><tt class="py-lineno"> 66</tt>  <tt class="py-line"><tt class="py-docstring">    ['bin laden', 'obama', 'pakistan', 'killed', 'raid']</tt> </tt>
    126. 

  126. <a name="L67"></a><tt class="py-lineno"> 67</tt>  <tt class="py-line"><tt class="py-docstring">    Tags for  tests/bbc2.txt :</tt> </tt>
    127. 

  127. <a name="L68"></a><tt class="py-lineno"> 68</tt>  <tt class="py-line"><tt class="py-docstring">    ['jo yeates', 'bristol', 'vincent tabak', 'murder', 'strangled']</tt> </tt>
    128. 

  128. <a name="L69"></a><tt class="py-lineno"> 69</tt>  <tt class="py-line"><tt class="py-docstring">    Tags for  tests/bbc3.txt :</tt> </tt>
    129. 

  129. <a name="L70"></a><tt class="py-lineno"> 70</tt>  <tt class="py-line"><tt class="py-docstring">    ['snp', 'party', 'election', 'scottish', 'labour']</tt> </tt>
    130. 

  130. <a name="L71"></a><tt class="py-lineno"> 71</tt>  <tt class="py-line"><tt class="py-docstring">    Tags for  tests/guardian1.txt :</tt> </tt>
    131. 

  131. <a name="L72"></a><tt class="py-lineno"> 72</tt>  <tt class="py-line"><tt class="py-docstring">    ['bin laden', 'al-qaida', 'killed', 'pakistan', 'al-fawwaz']</tt> </tt>
    132. 

  132. <a name="L73"></a><tt class="py-lineno"> 73</tt>  <tt class="py-line"><tt class="py-docstring">    Tags for  tests/guardian2.txt :</tt> </tt>
    133. 

  133. <a name="L74"></a><tt class="py-lineno"> 74</tt>  <tt class="py-line"><tt class="py-docstring">    ['clegg', 'tory', 'lib dem', 'party', 'coalition']</tt> </tt>
    134. 

  134. <a name="L75"></a><tt class="py-lineno"> 75</tt>  <tt class="py-line"><tt class="py-docstring">    Tags for  tests/post1.txt :</tt> </tt>
    135. 

  135. <a name="L76"></a><tt class="py-lineno"> 76</tt>  <tt class="py-line"><tt class="py-docstring">    ['sony', 'stolen', 'playstation network', 'hacker attack', 'lawsuit']</tt> </tt>
    136. 

  136. <a name="L77"></a><tt class="py-lineno"> 77</tt>  <tt class="py-line"><tt class="py-docstring">    Tags for  tests/wikipedia1.txt :</tt> </tt>
    137. 

  137. <a name="L78"></a><tt class="py-lineno"> 78</tt>  <tt class="py-line"><tt class="py-docstring">    ['universe', 'anthropic principle', 'observed', 'cosmological', 'theory']</tt> </tt>
    138. 

  138. <a name="L79"></a><tt class="py-lineno"> 79</tt>  <tt class="py-line"><tt class="py-docstring">    Tags for  tests/wikipedia2.txt :</tt> </tt>
    139. 

  139. <a name="L80"></a><tt class="py-lineno"> 80</tt>  <tt class="py-line"><tt class="py-docstring">    ['beetroot', 'beet', 'betaine', 'blood pressure', 'dietary nitrate']</tt> </tt>
    140. 

  140. <a name="L81"></a><tt class="py-lineno"> 81</tt>  <tt class="py-line"><tt class="py-docstring">    Tags for  tests/wikipedia3.txt :</tt> </tt>
    141. 

  141. <a name="L82"></a><tt class="py-lineno"> 82</tt>  <tt class="py-line"><tt class="py-docstring">    ['the lounge lizards', 'jazz', 'john lurie', 'musical', 'albums']</tt> </tt>
    142. 

  142. <a name="L83"></a><tt class="py-lineno"> 83</tt>  <tt class="py-line"><tt class="py-docstring">'''</tt> </tt>
    143. 

  143. <a name="L84"></a><tt class="py-lineno"> 84</tt>  <tt class="py-line"> </tt>
    144. 

  144. <a name="L85"></a><tt class="py-lineno"> 85</tt>  <tt class="py-line"><tt class="py-keyword">import</tt> <tt class="py-name">collections</tt> </tt>
    145. 

  145. <a name="L86"></a><tt class="py-lineno"> 86</tt>  <tt class="py-line"><tt class="py-keyword">import</tt> <tt class="py-name">re</tt> </tt>
    146. 

  146. <a name="L87"></a><tt class="py-lineno"> 87</tt>  <tt class="py-line"> </tt>
    147. 

  147. <a name="L88"></a><tt class="py-lineno"> 88</tt>  <tt class="py-line"> </tt>
    148. 

  148. <a name="Tag"></a><div id="Tag-def"><a name="L89"></a><tt class="py-lineno"> 89</tt> <a class="py-toggle" href="#" id="Tag-toggle" onclick="return toggle('Tag');">-</a><tt class="py-line"><tt class="py-keyword">class</tt> <a class="py-def-name" href="tagger.Tag-class.html">Tag</a><tt class="py-op">:</tt> </tt>
    149. 

  149. </div><div id="Tag-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="Tag-expanded"><a name="L90"></a><tt class="py-lineno"> 90</tt>  <tt class="py-line">    <tt class="py-docstring">'''</tt> </tt>
    150. 

  150. <a name="L91"></a><tt class="py-lineno"> 91</tt>  <tt class="py-line"><tt class="py-docstring">    General class for tags (small units of text)</tt> </tt>
    151. 

  151. <a name="L92"></a><tt class="py-lineno"> 92</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
    152. 

  152. <a name="L93"></a><tt class="py-lineno"> 93</tt>  <tt class="py-line">     </tt>
    153. 

  153. <a name="Tag.__init__"></a><div id="Tag.__init__-def"><a name="L94"></a><tt class="py-lineno"> 94</tt> <a class="py-toggle" href="#" id="Tag.__init__-toggle" onclick="return toggle('Tag.__init__');">-</a><tt class="py-line">    <tt class="py-keyword">def</tt> <a class="py-def-name" href="tagger.Tag-class.html#__init__">__init__</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">string</tt><tt class="py-op">,</tt> <tt class="py-param">stem</tt><tt class="py-op">=</tt><tt class="py-name">None</tt><tt class="py-op">,</tt> <tt class="py-param">rating</tt><tt class="py-op">=</tt><tt class="py-number">1.0</tt><tt class="py-op">,</tt> <tt class="py-param">proper</tt><tt class="py-op">=</tt><tt class="py-name">False</tt><tt class="py-op">,</tt> </tt>
    154. 

  154. <a name="L95"></a><tt class="py-lineno"> 95</tt>  <tt class="py-line">                 <tt class="py-param">terminal</tt><tt class="py-op">=</tt><tt class="py-name">False</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
    155. 

  155. </div><div id="Tag.__init__-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="Tag.__init__-expanded"><a name="L96"></a><tt class="py-lineno"> 96</tt>  <tt class="py-line">        <tt class="py-docstring">'''</tt> </tt>
    156. 

  156. <a name="L97"></a><tt class="py-lineno"> 97</tt>  <tt class="py-line"><tt class="py-docstring">        @param string:   the actual representation of the tag</tt> </tt>
    157. 

  157. <a name="L98"></a><tt class="py-lineno"> 98</tt>  <tt class="py-line"><tt class="py-docstring">        @param stem:     the internal (usually stemmed) representation;</tt> </tt>
    158. 

  158. <a name="L99"></a><tt class="py-lineno"> 99</tt>  <tt class="py-line"><tt class="py-docstring">                         tags with the same stem are regarded as equal</tt> </tt>
    159. 

  159. <a name="L100"></a><tt class="py-lineno">100</tt>  <tt class="py-line"><tt class="py-docstring">        @param rating:   a measure of the tag's relevance in the interval [0,1]</tt> </tt>
    160. 

  160. <a name="L101"></a><tt class="py-lineno">101</tt>  <tt class="py-line"><tt class="py-docstring">        @param proper:   whether the tag is a proper noun</tt> </tt>
    161. 

  161. <a name="L102"></a><tt class="py-lineno">102</tt>  <tt class="py-line"><tt class="py-docstring">        @param terminal: set to True if the tag is at the end of a phrase</tt> </tt>
    162. 

  162. <a name="L103"></a><tt class="py-lineno">103</tt>  <tt class="py-line"><tt class="py-docstring">                         (or anyway it cannot be logically merged to the</tt> </tt>
    163. 

  163. <a name="L104"></a><tt class="py-lineno">104</tt>  <tt class="py-line"><tt class="py-docstring">                         following one)</tt> </tt>
    164. 

  164. <a name="L105"></a><tt class="py-lineno">105</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
    165. 

  165. <a name="L106"></a><tt class="py-lineno">106</tt>  <tt class="py-line"><tt class="py-docstring">        @returns: a new L{Tag} object</tt> </tt>
    166. 

  166. <a name="L107"></a><tt class="py-lineno">107</tt>  <tt class="py-line"><tt class="py-docstring">        '''</tt> </tt>
    167. 

  167. <a name="L108"></a><tt class="py-lineno">108</tt>  <tt class="py-line">             </tt>
    168. 

  168. <a name="L109"></a><tt class="py-lineno">109</tt>  <tt class="py-line">        <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">string</tt>  <tt class="py-op">=</tt> <tt class="py-name">string</tt> </tt>
    169. 

  169. <a name="L110"></a><tt class="py-lineno">110</tt>  <tt class="py-line">        <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">stem</tt> <tt class="py-op">=</tt> <tt class="py-name">stem</tt> <tt class="py-keyword">or</tt> <tt class="py-name">string</tt> </tt>
    170. 

  170. <a name="L111"></a><tt class="py-lineno">111</tt>  <tt class="py-line">        <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">rating</tt> <tt class="py-op">=</tt> <tt class="py-name">rating</tt> </tt>
    171. 

  171. <a name="L112"></a><tt class="py-lineno">112</tt>  <tt class="py-line">        <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">proper</tt> <tt class="py-op">=</tt> <tt class="py-name">proper</tt> </tt>
    172. 

  172. <a name="L113"></a><tt class="py-lineno">113</tt>  <tt class="py-line">        <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">terminal</tt> <tt class="py-op">=</tt> <tt class="py-name">terminal</tt> </tt>
    173. 

  173. </div><a name="L114"></a><tt class="py-lineno">114</tt>  <tt class="py-line">         </tt>
    174. 

  174. <a name="Tag.__eq__"></a><div id="Tag.__eq__-def"><a name="L115"></a><tt class="py-lineno">115</tt> <a class="py-toggle" href="#" id="Tag.__eq__-toggle" onclick="return toggle('Tag.__eq__');">-</a><tt class="py-line">    <tt class="py-keyword">def</tt> <a class="py-def-name" href="tagger.Tag-class.html#__eq__">__eq__</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">other</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
    175. 

  175. </div><div id="Tag.__eq__-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="Tag.__eq__-expanded"><a name="L116"></a><tt class="py-lineno">116</tt>  <tt class="py-line">        <tt class="py-keyword">return</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">stem</tt> <tt class="py-op">==</tt> <tt class="py-name">other</tt><tt class="py-op">.</tt><tt class="py-name">stem</tt> </tt>
    176. 

  176. </div><a name="L117"></a><tt class="py-lineno">117</tt>  <tt class="py-line"> </tt>
    177. 

  177. <a name="Tag.__repr__"></a><div id="Tag.__repr__-def"><a name="L118"></a><tt class="py-lineno">118</tt> <a class="py-toggle" href="#" id="Tag.__repr__-toggle" onclick="return toggle('Tag.__repr__');">-</a><tt class="py-line">    <tt class="py-keyword">def</tt> <a class="py-def-name" href="tagger.Tag-class.html#__repr__">__repr__</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
    178. 

  178. </div><div id="Tag.__repr__-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="Tag.__repr__-expanded"><a name="L119"></a><tt class="py-lineno">119</tt>  <tt class="py-line">        <tt class="py-keyword">return</tt> <tt class="py-name">repr</tt><tt class="py-op">(</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">string</tt><tt class="py-op">)</tt> </tt>
    179. 

  179. </div><a name="L120"></a><tt class="py-lineno">120</tt>  <tt class="py-line"> </tt>
    180. 

  180. <a name="Tag.__lt__"></a><div id="Tag.__lt__-def"><a name="L121"></a><tt class="py-lineno">121</tt> <a class="py-toggle" href="#" id="Tag.__lt__-toggle" onclick="return toggle('Tag.__lt__');">-</a><tt class="py-line">    <tt class="py-keyword">def</tt> <a class="py-def-name" href="tagger.Tag-class.html#__lt__">__lt__</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">other</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
    181. 

  181. </div><div id="Tag.__lt__-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="Tag.__lt__-expanded"><a name="L122"></a><tt class="py-lineno">122</tt>  <tt class="py-line">        <tt class="py-keyword">return</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">rating</tt> <tt class="py-op">&gt;</tt> <tt class="py-name">other</tt><tt class="py-op">.</tt><tt class="py-name">rating</tt> </tt>
    182. 

  182. </div><a name="L123"></a><tt class="py-lineno">123</tt>  <tt class="py-line"> </tt>
    183. 

  183. <a name="Tag.__hash__"></a><div id="Tag.__hash__-def"><a name="L124"></a><tt class="py-lineno">124</tt> <a class="py-toggle" href="#" id="Tag.__hash__-toggle" onclick="return toggle('Tag.__hash__');">-</a><tt class="py-line">    <tt class="py-keyword">def</tt> <a class="py-def-name" href="tagger.Tag-class.html#__hash__">__hash__</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
    184. 

  184. </div><div id="Tag.__hash__-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="Tag.__hash__-expanded"><a name="L125"></a><tt class="py-lineno">125</tt>  <tt class="py-line">        <tt class="py-keyword">return</tt> <tt class="py-name">hash</tt><tt class="py-op">(</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">stem</tt><tt class="py-op">)</tt> </tt>
    185. 

  185. </div></div><a name="L126"></a><tt class="py-lineno">126</tt>  <tt class="py-line"> </tt>
    186. 

  186. <a name="L127"></a><tt class="py-lineno">127</tt>  <tt class="py-line"> </tt>
    187. 

  187. <a name="MultiTag"></a><div id="MultiTag-def"><a name="L128"></a><tt class="py-lineno">128</tt> <a class="py-toggle" href="#" id="MultiTag-toggle" onclick="return toggle('MultiTag');">-</a><tt class="py-line"><tt class="py-keyword">class</tt> <a class="py-def-name" href="tagger.MultiTag-class.html">MultiTag</a><tt class="py-op">(</tt><tt class="py-base-class">Tag</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
    188. 

  188. </div><div id="MultiTag-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="MultiTag-expanded"><a name="L129"></a><tt class="py-lineno">129</tt>  <tt class="py-line">    <tt class="py-docstring">'''</tt> </tt>
    189. 

  189. <a name="L130"></a><tt class="py-lineno">130</tt>  <tt class="py-line"><tt class="py-docstring">    Class for aggregates of tags (usually next to each other in the document)</tt> </tt>
    190. 

  190. <a name="L131"></a><tt class="py-lineno">131</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
    191. 

  191. <a name="L132"></a><tt class="py-lineno">132</tt>  <tt class="py-line">     </tt>
    192. 

  192. <a name="MultiTag.__init__"></a><div id="MultiTag.__init__-def"><a name="L133"></a><tt class="py-lineno">133</tt> <a class="py-toggle" href="#" id="MultiTag.__init__-toggle" onclick="return toggle('MultiTag.__init__');">-</a><tt class="py-line">    <tt class="py-keyword">def</tt> <a class="py-def-name" href="tagger.MultiTag-class.html#__init__">__init__</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">tail</tt><tt class="py-op">,</tt> <tt class="py-param">head</tt><tt class="py-op">=</tt><tt class="py-name">None</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
    193. 

  193. </div><div id="MultiTag.__init__-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="MultiTag.__init__-expanded"><a name="L134"></a><tt class="py-lineno">134</tt>  <tt class="py-line">        <tt class="py-docstring">'''</tt> </tt>
    194. 

  194. <a name="L135"></a><tt class="py-lineno">135</tt>  <tt class="py-line"><tt class="py-docstring">        @param tail: the L{Tag} object to add to the first part (head)</tt> </tt>
    195. 

  195. <a name="L136"></a><tt class="py-lineno">136</tt>  <tt class="py-line"><tt class="py-docstring">        @param head: the (eventually absent) L{MultiTag} to be extended</tt> </tt>
    196. 

  196. <a name="L137"></a><tt class="py-lineno">137</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
    197. 

  197. <a name="L138"></a><tt class="py-lineno">138</tt>  <tt class="py-line"><tt class="py-docstring">        @returns: a new L{MultiTag} object</tt> </tt>
    198. 

  198. <a name="L139"></a><tt class="py-lineno">139</tt>  <tt class="py-line"><tt class="py-docstring">        '''</tt> </tt>
    199. 

  199. <a name="L140"></a><tt class="py-lineno">140</tt>  <tt class="py-line">         </tt>
    200. 

  200. <a name="L141"></a><tt class="py-lineno">141</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-keyword">not</tt> <tt class="py-name">head</tt><tt class="py-op">:</tt> </tt>
    201. 

  201. <a name="L142"></a><tt class="py-lineno">142</tt>  <tt class="py-line">            <tt id="link-0" class="py-name" targets="Class tagger.Tag=tagger.Tag-class.html"><a title="tagger.Tag" class="py-name" href="#" onclick="return doclink('link-0', 'Tag', 'link-0');">Tag</a></tt><tt class="py-op">.</tt><tt id="link-1" class="py-name" targets="Method extras.FastStemmer.__init__()=extras.FastStemmer-class.html#__init__,Method tagger.MultiTag.__init__()=tagger.MultiTag-class.html#__init__,Method tagger.Rater.__init__()=tagger.Rater-class.html#__init__,Method tagger.Stemmer.__init__()=tagger.Stemmer-class.html#__init__,Method tagger.Tag.__init__()=tagger.Tag-class.html#__init__,Method tagger.Tagger.__init__()=tagger.Tagger-class.html#__init__"><a title="extras.FastStemmer.__init__
    202. 

  202. tagger.MultiTag.__init__
    203. 

  203. tagger.Rater.__init__
    204. 

  204. tagger.Stemmer.__init__
    205. 

  205. tagger.Tag.__init__
    206. 

  206. tagger.Tagger.__init__" class="py-name" href="#" onclick="return doclink('link-1', '__init__', 'link-1');">__init__</a></tt><tt class="py-op">(</tt><tt class="py-name">self</tt><tt class="py-op">,</tt> <tt class="py-name">tail</tt><tt class="py-op">.</tt><tt class="py-name">string</tt><tt class="py-op">,</tt> <tt class="py-name">tail</tt><tt class="py-op">.</tt><tt class="py-name">stem</tt><tt class="py-op">,</tt> <tt class="py-name">tail</tt><tt class="py-op">.</tt><tt class="py-name">rating</tt><tt class="py-op">,</tt> </tt>
    207. 

  207. <a name="L143"></a><tt class="py-lineno">143</tt>  <tt class="py-line">                         <tt class="py-name">tail</tt><tt class="py-op">.</tt><tt class="py-name">proper</tt><tt class="py-op">,</tt> <tt class="py-name">tail</tt><tt class="py-op">.</tt><tt class="py-name">terminal</tt><tt class="py-op">)</tt> </tt>
    208. 

  208. <a name="L144"></a><tt class="py-lineno">144</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">size</tt> <tt class="py-op">=</tt> <tt class="py-number">1</tt> </tt>
    209. 

  209. <a name="L145"></a><tt class="py-lineno">145</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">subratings</tt> <tt class="py-op">=</tt> <tt class="py-op">[</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">rating</tt><tt class="py-op">]</tt> </tt>
    210. 

  210. <a name="L146"></a><tt class="py-lineno">146</tt>  <tt class="py-line">        <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
    211. 

  211. <a name="L147"></a><tt class="py-lineno">147</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">string</tt> <tt class="py-op">=</tt> <tt class="py-string">' '</tt><tt class="py-op">.</tt><tt class="py-name">join</tt><tt class="py-op">(</tt><tt class="py-op">[</tt><tt class="py-name">head</tt><tt class="py-op">.</tt><tt class="py-name">string</tt><tt class="py-op">,</tt> <tt class="py-name">tail</tt><tt class="py-op">.</tt><tt class="py-name">string</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
    212. 

  212. <a name="L148"></a><tt class="py-lineno">148</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">stem</tt> <tt class="py-op">=</tt> <tt class="py-string">' '</tt><tt class="py-op">.</tt><tt class="py-name">join</tt><tt class="py-op">(</tt><tt class="py-op">[</tt><tt class="py-name">head</tt><tt class="py-op">.</tt><tt class="py-name">stem</tt><tt class="py-op">,</tt> <tt class="py-name">tail</tt><tt class="py-op">.</tt><tt class="py-name">stem</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
    213. 

  213. <a name="L149"></a><tt class="py-lineno">149</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">size</tt> <tt class="py-op">=</tt> <tt class="py-name">head</tt><tt class="py-op">.</tt><tt class="py-name">size</tt> <tt class="py-op">+</tt> <tt class="py-number">1</tt> </tt>
    214. 

  214. <a name="L150"></a><tt class="py-lineno">150</tt>  <tt class="py-line"> </tt>
    215. 

  215. <a name="L151"></a><tt class="py-lineno">151</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">proper</tt> <tt class="py-op">=</tt> <tt class="py-op">(</tt><tt class="py-name">head</tt><tt class="py-op">.</tt><tt class="py-name">proper</tt> <tt class="py-keyword">and</tt> <tt class="py-name">tail</tt><tt class="py-op">.</tt><tt class="py-name">proper</tt><tt class="py-op">)</tt> </tt>
    216. 

  216. <a name="L152"></a><tt class="py-lineno">152</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">terminal</tt> <tt class="py-op">=</tt> <tt class="py-name">tail</tt><tt class="py-op">.</tt><tt class="py-name">terminal</tt> </tt>
    217. 

  217. <a name="L153"></a><tt class="py-lineno">153</tt>  <tt class="py-line"> </tt>
    218. 

  218. <a name="L154"></a><tt class="py-lineno">154</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">subratings</tt> <tt class="py-op">=</tt> <tt class="py-name">head</tt><tt class="py-op">.</tt><tt class="py-name">subratings</tt> <tt class="py-op">+</tt> <tt class="py-op">[</tt><tt class="py-name">tail</tt><tt class="py-op">.</tt><tt class="py-name">rating</tt><tt class="py-op">]</tt> </tt>
    219. 

  219. <a name="L155"></a><tt class="py-lineno">155</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">rating</tt> <tt class="py-op">=</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-2" class="py-name" targets="Method tagger.MultiTag.combined_rating()=tagger.MultiTag-class.html#combined_rating"><a title="tagger.MultiTag.combined_rating" class="py-name" href="#" onclick="return doclink('link-2', 'combined_rating', 'link-2');">combined_rating</a></tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
    220. 

  220. </div><a name="L156"></a><tt class="py-lineno">156</tt>  <tt class="py-line">                                            </tt>
    221. 

  221. <a name="MultiTag.combined_rating"></a><div id="MultiTag.combined_rating-def"><a name="L157"></a><tt class="py-lineno">157</tt> <a class="py-toggle" href="#" id="MultiTag.combined_rating-toggle" onclick="return toggle('MultiTag.combined_rating');">-</a><tt class="py-line">    <tt class="py-keyword">def</tt> <a class="py-def-name" href="tagger.MultiTag-class.html#combined_rating">combined_rating</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
    222. 

  222. </div><div id="MultiTag.combined_rating-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="MultiTag.combined_rating-expanded"><a name="L158"></a><tt class="py-lineno">158</tt>  <tt class="py-line">        <tt class="py-docstring">'''</tt> </tt>
    223. 

  223. <a name="L159"></a><tt class="py-lineno">159</tt>  <tt class="py-line"><tt class="py-docstring">        Method that computes the multitag's rating from the ratings of unit</tt> </tt>
    224. 

  224. <a name="L160"></a><tt class="py-lineno">160</tt>  <tt class="py-line"><tt class="py-docstring">        subtags</tt> </tt>
    225. 

  225. <a name="L161"></a><tt class="py-lineno">161</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
    226. 

  226. <a name="L162"></a><tt class="py-lineno">162</tt>  <tt class="py-line"><tt class="py-docstring">        (the default implementation uses the geometric mean - with a special</tt> </tt>
    227. 

  227. <a name="L163"></a><tt class="py-lineno">163</tt>  <tt class="py-line"><tt class="py-docstring">        treatment for proper nouns - but this method can be overridden)</tt> </tt>
    228. 

  228. <a name="L164"></a><tt class="py-lineno">164</tt>  <tt class="py-line"><tt class="py-docstring">        </tt> </tt>
    229. 

  229. <a name="L165"></a><tt class="py-lineno">165</tt>  <tt class="py-line"><tt class="py-docstring">        @returns: the rating of the multitag</tt> </tt>
    230. 

  230. <a name="L166"></a><tt class="py-lineno">166</tt>  <tt class="py-line"><tt class="py-docstring">        '''</tt> </tt>
    231. 

  231. <a name="L167"></a><tt class="py-lineno">167</tt>  <tt class="py-line">         </tt>
    232. 

  232. <a name="L168"></a><tt class="py-lineno">168</tt>  <tt class="py-line">        <tt class="py-comment"># by default, the rating of a multitag is the geometric mean of its</tt> </tt>
    233. 

  233. <a name="L169"></a><tt class="py-lineno">169</tt>  <tt class="py-line">        <tt class="py-comment"># unit subtags' ratings</tt> </tt>
    234. 

  234. <a name="L170"></a><tt class="py-lineno">170</tt>  <tt class="py-line">        <tt class="py-name">product</tt> <tt class="py-op">=</tt> <tt class="py-name">reduce</tt><tt class="py-op">(</tt><tt class="py-keyword">lambda</tt> <tt class="py-name">x</tt><tt class="py-op">,</tt> <tt class="py-name">y</tt><tt class="py-op">:</tt> <tt class="py-name">x</tt> <tt class="py-op">*</tt> <tt class="py-name">y</tt><tt class="py-op">,</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">subratings</tt><tt class="py-op">,</tt> <tt class="py-number">1.0</tt><tt class="py-op">)</tt> </tt>
    235. 

  235. <a name="L171"></a><tt class="py-lineno">171</tt>  <tt class="py-line">        <tt class="py-name">root</tt> <tt class="py-op">=</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">size</tt> </tt>
    236. 

  236. <a name="L172"></a><tt class="py-lineno">172</tt>  <tt class="py-line">         </tt>
    237. 

  237. <a name="L173"></a><tt class="py-lineno">173</tt>  <tt class="py-line">        <tt class="py-comment"># but proper nouns shouldn't be penalized by stopwords</tt> </tt>
    238. 

  238. <a name="L174"></a><tt class="py-lineno">174</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-name">product</tt> <tt class="py-op">==</tt> <tt class="py-number">0.0</tt> <tt class="py-keyword">and</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">proper</tt><tt class="py-op">:</tt> </tt>
    239. 

  239. <a name="L175"></a><tt class="py-lineno">175</tt>  <tt class="py-line">            <tt class="py-name">nonzero</tt> <tt class="py-op">=</tt> <tt class="py-op">[</tt><tt class="py-name">r</tt> <tt class="py-keyword">for</tt> <tt class="py-name">r</tt> <tt class="py-keyword">in</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">subratings</tt> <tt class="py-keyword">if</tt> <tt class="py-name">r</tt> <tt class="py-op">&gt;</tt> <tt class="py-number">0.0</tt><tt class="py-op">]</tt> </tt>
    240. 

  240. <a name="L176"></a><tt class="py-lineno">176</tt>  <tt class="py-line">            <tt class="py-keyword">if</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">nonzero</tt><tt class="py-op">)</tt> <tt class="py-op">==</tt> <tt class="py-number">0</tt><tt class="py-op">:</tt> </tt>
    241. 

  241. <a name="L177"></a><tt class="py-lineno">177</tt>  <tt class="py-line">                <tt class="py-keyword">return</tt> <tt class="py-number">0.0</tt> </tt>
    242. 

  242. <a name="L178"></a><tt class="py-lineno">178</tt>  <tt class="py-line">            <tt class="py-name">product</tt> <tt class="py-op">=</tt> <tt class="py-name">reduce</tt><tt class="py-op">(</tt><tt class="py-keyword">lambda</tt> <tt class="py-name">x</tt><tt class="py-op">,</tt> <tt class="py-name">y</tt><tt class="py-op">:</tt> <tt class="py-name">x</tt> <tt class="py-op">*</tt> <tt class="py-name">y</tt><tt class="py-op">,</tt> <tt class="py-name">nonzero</tt><tt class="py-op">,</tt> <tt class="py-number">1.0</tt><tt class="py-op">)</tt> </tt>
    243. 

  243. <a name="L179"></a><tt class="py-lineno">179</tt>  <tt class="py-line">            <tt class="py-name">root</tt> <tt class="py-op">=</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">nonzero</tt><tt class="py-op">)</tt> </tt>
    244. 

  244. <a name="L180"></a><tt class="py-lineno">180</tt>  <tt class="py-line">             </tt>
    245. 

  245. <a name="L181"></a><tt class="py-lineno">181</tt>  <tt class="py-line">        <tt class="py-keyword">return</tt> <tt class="py-name">product</tt> <tt class="py-op">**</tt> <tt class="py-op">(</tt><tt class="py-number">1.0</tt> <tt class="py-op">/</tt> <tt class="py-name">root</tt><tt class="py-op">)</tt> </tt>
    246. 

  246. </div></div><a name="L182"></a><tt class="py-lineno">182</tt>  <tt class="py-line"> </tt>
    247. 

  247. <a name="L183"></a><tt class="py-lineno">183</tt>  <tt class="py-line">     </tt>
    248. 

  248. <a name="Reader"></a><div id="Reader-def"><a name="L184"></a><tt class="py-lineno">184</tt> <a class="py-toggle" href="#" id="Reader-toggle" onclick="return toggle('Reader');">-</a><tt class="py-line"><tt class="py-keyword">class</tt> <a class="py-def-name" href="tagger.Reader-class.html">Reader</a><tt class="py-op">:</tt> </tt>
    249. 

  249. </div><div id="Reader-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="Reader-expanded"><a name="L185"></a><tt class="py-lineno">185</tt>  <tt class="py-line">    <tt class="py-docstring">'''</tt> </tt>
    250. 

  250. <a name="L186"></a><tt class="py-lineno">186</tt>  <tt class="py-line"><tt class="py-docstring">    Class for parsing a string of text to obtain tags</tt> </tt>
    251. 

  251. <a name="L187"></a><tt class="py-lineno">187</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
    252. 

  252. <a name="L188"></a><tt class="py-lineno">188</tt>  <tt class="py-line"><tt class="py-docstring">    (it just turns the string to lowercase and splits it according to</tt> </tt>
    253. 

  253. <a name="L189"></a><tt class="py-lineno">189</tt>  <tt class="py-line"><tt class="py-docstring">    whitespaces and punctuation, identifying proper nouns and terminal words;</tt> </tt>
    254. 

  254. <a name="L190"></a><tt class="py-lineno">190</tt>  <tt class="py-line"><tt class="py-docstring">    different rules and formats other than plain text could be used)</tt> </tt>
    255. 

  255. <a name="L191"></a><tt class="py-lineno">191</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
    256. 

  256. <a name="L192"></a><tt class="py-lineno">192</tt>  <tt class="py-line"> </tt>
    257. 

  257. <a name="L193"></a><tt class="py-lineno">193</tt>  <tt class="py-line">    <tt id="link-3" class="py-name" targets="Variable tagger.Reader.match_apostrophes=tagger.Reader-class.html#match_apostrophes"><a title="tagger.Reader.match_apostrophes" class="py-name" href="#" onclick="return doclink('link-3', 'match_apostrophes', 'link-3');">match_apostrophes</a></tt> <tt class="py-op">=</tt> <tt class="py-name">re</tt><tt class="py-op">.</tt><tt class="py-name">compile</tt><tt class="py-op">(</tt><tt class="py-string">'`|&#8217;'</tt><tt class="py-op">)</tt> </tt>
    258. 

  258. <a name="L194"></a><tt class="py-lineno">194</tt>  <tt class="py-line">    <tt id="link-4" class="py-name" targets="Variable tagger.Reader.match_paragraphs=tagger.Reader-class.html#match_paragraphs"><a title="tagger.Reader.match_paragraphs" class="py-name" href="#" onclick="return doclink('link-4', 'match_paragraphs', 'link-4');">match_paragraphs</a></tt> <tt class="py-op">=</tt> <tt class="py-name">re</tt><tt class="py-op">.</tt><tt class="py-name">compile</tt><tt class="py-op">(</tt><tt class="py-string">'[\.\?!\t\n\r\f\v]+'</tt><tt class="py-op">)</tt> </tt>
    259. 

  259. <a name="L195"></a><tt class="py-lineno">195</tt>  <tt class="py-line">    <tt id="link-5" class="py-name" targets="Variable tagger.Reader.match_phrases=tagger.Reader-class.html#match_phrases"><a title="tagger.Reader.match_phrases" class="py-name" href="#" onclick="return doclink('link-5', 'match_phrases', 'link-5');">match_phrases</a></tt> <tt class="py-op">=</tt> <tt class="py-name">re</tt><tt class="py-op">.</tt><tt class="py-name">compile</tt><tt class="py-op">(</tt><tt class="py-string">'[,;:\(\)\[\]\{\}&lt;&gt;]+'</tt><tt class="py-op">)</tt> </tt>
    260. 

  260. <a name="L196"></a><tt class="py-lineno">196</tt>  <tt class="py-line">    <tt id="link-6" class="py-name" targets="Variable tagger.Reader.match_words=tagger.Reader-class.html#match_words"><a title="tagger.Reader.match_words" class="py-name" href="#" onclick="return doclink('link-6', 'match_words', 'link-6');">match_words</a></tt> <tt class="py-op">=</tt> <tt class="py-name">re</tt><tt class="py-op">.</tt><tt class="py-name">compile</tt><tt class="py-op">(</tt><tt class="py-string">'[\w\-\'_/&amp;]+'</tt><tt class="py-op">)</tt> </tt>
    261. 

  261. <a name="L197"></a><tt class="py-lineno">197</tt>  <tt class="py-line">     </tt>
    262. 

  262. <a name="Reader.__call__"></a><div id="Reader.__call__-def"><a name="L198"></a><tt class="py-lineno">198</tt> <a class="py-toggle" href="#" id="Reader.__call__-toggle" onclick="return toggle('Reader.__call__');">-</a><tt class="py-line">    <tt class="py-keyword">def</tt> <a class="py-def-name" href="tagger.Reader-class.html#__call__">__call__</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">text</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
    263. 

  263. </div><div id="Reader.__call__-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="Reader.__call__-expanded"><a name="L199"></a><tt class="py-lineno">199</tt>  <tt class="py-line">        <tt class="py-docstring">'''</tt> </tt>
    264. 

  264. <a name="L200"></a><tt class="py-lineno">200</tt>  <tt class="py-line"><tt class="py-docstring">        @param text: the string of text to be tagged</tt> </tt>
    265. 

  265. <a name="L201"></a><tt class="py-lineno">201</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
    266. 

  266. <a name="L202"></a><tt class="py-lineno">202</tt>  <tt class="py-line"><tt class="py-docstring">        @returns: a list of tags respecting the order in the text</tt> </tt>
    267. 

  267. <a name="L203"></a><tt class="py-lineno">203</tt>  <tt class="py-line"><tt class="py-docstring">        '''</tt> </tt>
    268. 

  268. <a name="L204"></a><tt class="py-lineno">204</tt>  <tt class="py-line"> </tt>
    269. 

  269. <a name="L205"></a><tt class="py-lineno">205</tt>  <tt class="py-line">        <tt class="py-name">text</tt> <tt class="py-op">=</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-7" class="py-name" targets="Method tagger.Reader.preprocess()=tagger.Reader-class.html#preprocess,Method tagger.Stemmer.preprocess()=tagger.Stemmer-class.html#preprocess"><a title="tagger.Reader.preprocess
    270. 

  270. tagger.Stemmer.preprocess" class="py-name" href="#" onclick="return doclink('link-7', 'preprocess', 'link-7');">preprocess</a></tt><tt class="py-op">(</tt><tt class="py-name">text</tt><tt class="py-op">)</tt> </tt>
    271. 

  271. <a name="L206"></a><tt class="py-lineno">206</tt>  <tt class="py-line"> </tt>
    272. 

  272. <a name="L207"></a><tt class="py-lineno">207</tt>  <tt class="py-line">        <tt class="py-comment"># split by full stops, newlines, question marks...</tt> </tt>
    273. 

  273. <a name="L208"></a><tt class="py-lineno">208</tt>  <tt class="py-line">        <tt class="py-name">paragraphs</tt> <tt class="py-op">=</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-8" class="py-name"><a title="tagger.Reader.match_paragraphs" class="py-name" href="#" onclick="return doclink('link-8', 'match_paragraphs', 'link-4');">match_paragraphs</a></tt><tt class="py-op">.</tt><tt class="py-name">split</tt><tt class="py-op">(</tt><tt class="py-name">text</tt><tt class="py-op">)</tt> </tt>
    274. 

  274. <a name="L209"></a><tt class="py-lineno">209</tt>  <tt class="py-line"> </tt>
    275. 

  275. <a name="L210"></a><tt class="py-lineno">210</tt>  <tt class="py-line">        <tt class="py-name">tags</tt> <tt class="py-op">=</tt> <tt class="py-op">[</tt><tt class="py-op">]</tt> </tt>
    276. 

  276. <a name="L211"></a><tt class="py-lineno">211</tt>  <tt class="py-line"> </tt>
    277. 

  277. <a name="L212"></a><tt class="py-lineno">212</tt>  <tt class="py-line">        <tt class="py-keyword">for</tt> <tt class="py-name">par</tt> <tt class="py-keyword">in</tt> <tt class="py-name">paragraphs</tt><tt class="py-op">:</tt> </tt>
    278. 

  278. <a name="L213"></a><tt class="py-lineno">213</tt>  <tt class="py-line">            <tt class="py-comment"># split by commas, colons, parentheses...</tt> </tt>
    279. 

  279. <a name="L214"></a><tt class="py-lineno">214</tt>  <tt class="py-line">            <tt class="py-name">phrases</tt> <tt class="py-op">=</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-9" class="py-name"><a title="tagger.Reader.match_phrases" class="py-name" href="#" onclick="return doclink('link-9', 'match_phrases', 'link-5');">match_phrases</a></tt><tt class="py-op">.</tt><tt class="py-name">split</tt><tt class="py-op">(</tt><tt class="py-name">par</tt><tt class="py-op">)</tt> </tt>
    280. 

  280. <a name="L215"></a><tt class="py-lineno">215</tt>  <tt class="py-line"> </tt>
    281. 

  281. <a name="L216"></a><tt class="py-lineno">216</tt>  <tt class="py-line">            <tt class="py-keyword">if</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">phrases</tt><tt class="py-op">)</tt> <tt class="py-op">&gt;</tt> <tt class="py-number">0</tt><tt class="py-op">:</tt> </tt>
    282. 

  282. <a name="L217"></a><tt class="py-lineno">217</tt>  <tt class="py-line">                <tt class="py-comment"># first phrase of a paragraph</tt> </tt>
    283. 

  283. <a name="L218"></a><tt class="py-lineno">218</tt>  <tt class="py-line">                <tt class="py-name">words</tt> <tt class="py-op">=</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-10" class="py-name"><a title="tagger.Reader.match_words" class="py-name" href="#" onclick="return doclink('link-10', 'match_words', 'link-6');">match_words</a></tt><tt class="py-op">.</tt><tt class="py-name">findall</tt><tt class="py-op">(</tt><tt class="py-name">phrases</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
    284. 

  284. <a name="L219"></a><tt class="py-lineno">219</tt>  <tt class="py-line">                <tt class="py-keyword">if</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">words</tt><tt class="py-op">)</tt> <tt class="py-op">&gt;</tt> <tt class="py-number">1</tt><tt class="py-op">:</tt> </tt>
    285. 

  285. <a name="L220"></a><tt class="py-lineno">220</tt>  <tt class="py-line">                    <tt class="py-name">tags</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt id="link-11" class="py-name"><a title="tagger.Tag" class="py-name" href="#" onclick="return doclink('link-11', 'Tag', 'link-0');">Tag</a></tt><tt class="py-op">(</tt><tt class="py-name">words</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">.</tt><tt class="py-name">lower</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
    286. 

  286. <a name="L221"></a><tt class="py-lineno">221</tt>  <tt class="py-line">                    <tt class="py-keyword">for</tt> <tt class="py-name">w</tt> <tt class="py-keyword">in</tt> <tt class="py-name">words</tt><tt class="py-op">[</tt><tt class="py-number">1</tt><tt class="py-op">:</tt><tt class="py-op">-</tt><tt class="py-number">1</tt><tt class="py-op">]</tt><tt class="py-op">:</tt> </tt>
    287. 

  287. <a name="L222"></a><tt class="py-lineno">222</tt>  <tt class="py-line">                        <tt class="py-name">tags</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt id="link-12" class="py-name"><a title="tagger.Tag" class="py-name" href="#" onclick="return doclink('link-12', 'Tag', 'link-0');">Tag</a></tt><tt class="py-op">(</tt><tt class="py-name">w</tt><tt class="py-op">.</tt><tt class="py-name">lower</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">,</tt> <tt class="py-name">proper</tt><tt class="py-op">=</tt><tt class="py-name">w</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">.</tt><tt class="py-name">isupper</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
    288. 

  288. <a name="L223"></a><tt class="py-lineno">223</tt>  <tt class="py-line">                    <tt class="py-name">tags</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt id="link-13" class="py-name"><a title="tagger.Tag" class="py-name" href="#" onclick="return doclink('link-13', 'Tag', 'link-0');">Tag</a></tt><tt class="py-op">(</tt><tt class="py-name">words</tt><tt class="py-op">[</tt><tt class="py-op">-</tt><tt class="py-number">1</tt><tt class="py-op">]</tt><tt class="py-op">.</tt><tt class="py-name">lower</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">,</tt> </tt>
    289. 

  289. <a name="L224"></a><tt class="py-lineno">224</tt>  <tt class="py-line">                                    <tt class="py-name">proper</tt><tt class="py-op">=</tt><tt class="py-name">words</tt><tt class="py-op">[</tt><tt class="py-op">-</tt><tt class="py-number">1</tt><tt class="py-op">]</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">.</tt><tt class="py-name">isupper</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">,</tt> </tt>
    290. 

  290. <a name="L225"></a><tt class="py-lineno">225</tt>  <tt class="py-line">                                    <tt class="py-name">terminal</tt><tt class="py-op">=</tt><tt class="py-name">True</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
    291. 

  291. <a name="L226"></a><tt class="py-lineno">226</tt>  <tt class="py-line">                <tt class="py-keyword">elif</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">words</tt><tt class="py-op">)</tt> <tt class="py-op">==</tt> <tt class="py-number">1</tt><tt class="py-op">:</tt> </tt>
    292. 

  292. <a name="L227"></a><tt class="py-lineno">227</tt>  <tt class="py-line">                    <tt class="py-name">tags</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt id="link-14" class="py-name"><a title="tagger.Tag" class="py-name" href="#" onclick="return doclink('link-14', 'Tag', 'link-0');">Tag</a></tt><tt class="py-op">(</tt><tt class="py-name">words</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">.</tt><tt class="py-name">lower</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">,</tt> <tt class="py-name">terminal</tt><tt class="py-op">=</tt><tt class="py-name">True</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
    293. 

  293. <a name="L228"></a><tt class="py-lineno">228</tt>  <tt class="py-line"> </tt>
    294. 

  294. <a name="L229"></a><tt class="py-lineno">229</tt>  <tt class="py-line">            <tt class="py-comment"># following phrases</tt> </tt>
    295. 

  295. <a name="L230"></a><tt class="py-lineno">230</tt>  <tt class="py-line">            <tt class="py-keyword">for</tt> <tt class="py-name">phr</tt> <tt class="py-keyword">in</tt> <tt class="py-name">phrases</tt><tt class="py-op">[</tt><tt class="py-number">1</tt><tt class="py-op">:</tt><tt class="py-op">]</tt><tt class="py-op">:</tt> </tt>
    296. 

  296. <a name="L231"></a><tt class="py-lineno">231</tt>  <tt class="py-line">                <tt class="py-name">words</tt> <tt class="py-op">=</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-15" class="py-name"><a title="tagger.Reader.match_words" class="py-name" href="#" onclick="return doclink('link-15', 'match_words', 'link-6');">match_words</a></tt><tt class="py-op">.</tt><tt class="py-name">findall</tt><tt class="py-op">(</tt><tt class="py-name">phr</tt><tt class="py-op">)</tt> </tt>
    297. 

  297. <a name="L232"></a><tt class="py-lineno">232</tt>  <tt class="py-line">                <tt class="py-keyword">if</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">words</tt><tt class="py-op">)</tt> <tt class="py-op">&gt;</tt> <tt class="py-number">1</tt><tt class="py-op">:</tt> </tt>
    298. 

  298. <a name="L233"></a><tt class="py-lineno">233</tt>  <tt class="py-line">                    <tt class="py-keyword">for</tt> <tt class="py-name">w</tt> <tt class="py-keyword">in</tt> <tt class="py-name">words</tt><tt class="py-op">[</tt><tt class="py-op">:</tt><tt class="py-op">-</tt><tt class="py-number">1</tt><tt class="py-op">]</tt><tt class="py-op">:</tt> </tt>
    299. 

  299. <a name="L234"></a><tt class="py-lineno">234</tt>  <tt class="py-line">                        <tt class="py-name">tags</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt id="link-16" class="py-name"><a title="tagger.Tag" class="py-name" href="#" onclick="return doclink('link-16', 'Tag', 'link-0');">Tag</a></tt><tt class="py-op">(</tt><tt class="py-name">w</tt><tt class="py-op">.</tt><tt class="py-name">lower</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">,</tt> <tt class="py-name">proper</tt><tt class="py-op">=</tt><tt class="py-name">w</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">.</tt><tt class="py-name">isupper</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
    300. 

  300. <a name="L235"></a><tt class="py-lineno">235</tt>  <tt class="py-line">                <tt class="py-keyword">if</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">words</tt><tt class="py-op">)</tt> <tt class="py-op">&gt;</tt> <tt class="py-number">0</tt><tt class="py-op">:</tt> </tt>
    301. 

  301. <a name="L236"></a><tt class="py-lineno">236</tt>  <tt class="py-line">                    <tt class="py-name">tags</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt id="link-17" class="py-name"><a title="tagger.Tag" class="py-name" href="#" onclick="return doclink('link-17', 'Tag', 'link-0');">Tag</a></tt><tt class="py-op">(</tt><tt class="py-name">words</tt><tt class="py-op">[</tt><tt class="py-op">-</tt><tt class="py-number">1</tt><tt class="py-op">]</tt><tt class="py-op">.</tt><tt class="py-name">lower</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">,</tt> </tt>
    302. 

  302. <a name="L237"></a><tt class="py-lineno">237</tt>  <tt class="py-line">                                    <tt class="py-name">proper</tt><tt class="py-op">=</tt><tt class="py-name">words</tt><tt class="py-op">[</tt><tt class="py-op">-</tt><tt class="py-number">1</tt><tt class="py-op">]</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">.</tt><tt class="py-name">isupper</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">,</tt> </tt>
    303. 

  303. <a name="L238"></a><tt class="py-lineno">238</tt>  <tt class="py-line">                                    <tt class="py-name">terminal</tt><tt class="py-op">=</tt><tt class="py-name">True</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
    304. 

  304. <a name="L239"></a><tt class="py-lineno">239</tt>  <tt class="py-line"> </tt>
    305. 

  305. <a name="L240"></a><tt class="py-lineno">240</tt>  <tt class="py-line">        <tt class="py-keyword">return</tt> <tt class="py-name">tags</tt> </tt>
    306. 

  306. </div><a name="L241"></a><tt class="py-lineno">241</tt>  <tt class="py-line"> </tt>
    307. 

  307. <a name="Reader.preprocess"></a><div id="Reader.preprocess-def"><a name="L242"></a><tt class="py-lineno">242</tt> <a class="py-toggle" href="#" id="Reader.preprocess-toggle" onclick="return toggle('Reader.preprocess');">-</a><tt class="py-line">    <tt class="py-keyword">def</tt> <a class="py-def-name" href="tagger.Reader-class.html#preprocess">preprocess</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">text</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
    308. 

  308. </div><div id="Reader.preprocess-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="Reader.preprocess-expanded"><a name="L243"></a><tt class="py-lineno">243</tt>  <tt class="py-line">        <tt class="py-docstring">'''</tt> </tt>
    309. 

  309. <a name="L244"></a><tt class="py-lineno">244</tt>  <tt class="py-line"><tt class="py-docstring">        @param text: a string containing the text document to perform any</tt> </tt>
    310. 

  310. <a name="L245"></a><tt class="py-lineno">245</tt>  <tt class="py-line"><tt class="py-docstring">                     required transformation before splitting</tt> </tt>
    311. 

  311. <a name="L246"></a><tt class="py-lineno">246</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
    312. 

  312. <a name="L247"></a><tt class="py-lineno">247</tt>  <tt class="py-line"><tt class="py-docstring">        @returns:    the processed text</tt> </tt>
    313. 

  313. <a name="L248"></a><tt class="py-lineno">248</tt>  <tt class="py-line"><tt class="py-docstring">        '''</tt> </tt>
    314. 

  314. <a name="L249"></a><tt class="py-lineno">249</tt>  <tt class="py-line">         </tt>
    315. 

  315. <a name="L250"></a><tt class="py-lineno">250</tt>  <tt class="py-line">        <tt class="py-name">text</tt> <tt class="py-op">=</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-18" class="py-name"><a title="tagger.Reader.match_apostrophes" class="py-name" href="#" onclick="return doclink('link-18', 'match_apostrophes', 'link-3');">match_apostrophes</a></tt><tt class="py-op">.</tt><tt class="py-name">sub</tt><tt class="py-op">(</tt><tt class="py-string">'\''</tt><tt class="py-op">,</tt> <tt class="py-name">text</tt><tt class="py-op">)</tt> </tt>
    316. 

  316. <a name="L251"></a><tt class="py-lineno">251</tt>  <tt class="py-line">        <tt class="py-keyword">return</tt> <tt class="py-name">text</tt> </tt>
    317. 

  317. </div></div><a name="L252"></a><tt class="py-lineno">252</tt>  <tt class="py-line"> </tt>
    318. 

  318. <a name="L253"></a><tt class="py-lineno">253</tt>  <tt class="py-line">     </tt>
    319. 

  319. <a name="Stemmer"></a><div id="Stemmer-def"><a name="L254"></a><tt class="py-lineno">254</tt> <a class="py-toggle" href="#" id="Stemmer-toggle" onclick="return toggle('Stemmer');">-</a><tt class="py-line"><tt class="py-keyword">class</tt> <a class="py-def-name" href="tagger.Stemmer-class.html">Stemmer</a><tt class="py-op">:</tt> </tt>
    320. 

  320. </div><div id="Stemmer-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="Stemmer-expanded"><a name="L255"></a><tt class="py-lineno">255</tt>  <tt class="py-line">    <tt class="py-docstring">'''</tt> </tt>
    321. 

  321. <a name="L256"></a><tt class="py-lineno">256</tt>  <tt class="py-line"><tt class="py-docstring">    Class for extracting the stem of a word</tt> </tt>
    322. 

  322. <a name="L257"></a><tt class="py-lineno">257</tt>  <tt class="py-line"><tt class="py-docstring">    </tt> </tt>
    323. 

  323. <a name="L258"></a><tt class="py-lineno">258</tt>  <tt class="py-line"><tt class="py-docstring">    (by default it uses a simple open-source implementation of Porter's</tt> </tt>
    324. 

  324. <a name="L259"></a><tt class="py-lineno">259</tt>  <tt class="py-line"><tt class="py-docstring">    algorithm; this can be improved a lot, so experimenting with different ones</tt> </tt>
    325. 

  325. <a name="L260"></a><tt class="py-lineno">260</tt>  <tt class="py-line"><tt class="py-docstring">    is advisable; nltk.stem provides different algorithms for many languages)</tt> </tt>
    326. 

  326. <a name="L261"></a><tt class="py-lineno">261</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
    327. 

  327. <a name="L262"></a><tt class="py-lineno">262</tt>  <tt class="py-line"> </tt>
    328. 

  328. <a name="L263"></a><tt class="py-lineno">263</tt>  <tt class="py-line">    <tt id="link-19" class="py-name" targets="Variable tagger.Stemmer.match_contractions=tagger.Stemmer-class.html#match_contractions"><a title="tagger.Stemmer.match_contractions" class="py-name" href="#" onclick="return doclink('link-19', 'match_contractions', 'link-19');">match_contractions</a></tt> <tt class="py-op">=</tt> <tt class="py-name">re</tt><tt class="py-op">.</tt><tt class="py-name">compile</tt><tt class="py-op">(</tt><tt class="py-string">'(\w+)\'(m|re|d|ve|s|ll|t)?'</tt><tt class="py-op">)</tt> </tt>
    329. 

  329. <a name="L264"></a><tt class="py-lineno">264</tt>  <tt class="py-line"> </tt>
    330. 

  330. <a name="Stemmer.__init__"></a><div id="Stemmer.__init__-def"><a name="L265"></a><tt class="py-lineno">265</tt> <a class="py-toggle" href="#" id="Stemmer.__init__-toggle" onclick="return toggle('Stemmer.__init__');">-</a><tt class="py-line">    <tt class="py-keyword">def</tt> <a class="py-def-name" href="tagger.Stemmer-class.html#__init__">__init__</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">stemmer</tt><tt class="py-op">=</tt><tt class="py-name">None</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
    331. 

  331. </div><div id="Stemmer.__init__-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="Stemmer.__init__-expanded"><a name="L266"></a><tt class="py-lineno">266</tt>  <tt class="py-line">        <tt class="py-docstring">'''</tt> </tt>
    332. 

  332. <a name="L267"></a><tt class="py-lineno">267</tt>  <tt class="py-line"><tt class="py-docstring">        @param stemmer: an object or module with a 'stem' method (defaults to</tt> </tt>
    333. 

  333. <a name="L268"></a><tt class="py-lineno">268</tt>  <tt class="py-line"><tt class="py-docstring">                        stemming.porter2)</tt> </tt>
    334. 

  334. <a name="L269"></a><tt class="py-lineno">269</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
    335. 

  335. <a name="L270"></a><tt class="py-lineno">270</tt>  <tt class="py-line"><tt class="py-docstring">        @returns: a new L{Stemmer} object</tt> </tt>
    336. 

  336. <a name="L271"></a><tt class="py-lineno">271</tt>  <tt class="py-line"><tt class="py-docstring">        '''</tt> </tt>
    337. 

  337. <a name="L272"></a><tt class="py-lineno">272</tt>  <tt class="py-line">         </tt>
    338. 

  338. <a name="L273"></a><tt class="py-lineno">273</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-keyword">not</tt> <tt class="py-name">stemmer</tt><tt class="py-op">:</tt> </tt>
    339. 

  339. <a name="L274"></a><tt class="py-lineno">274</tt>  <tt class="py-line">            <tt class="py-keyword">from</tt> <tt class="py-name">stemming</tt> <tt class="py-keyword">import</tt> <tt class="py-name">porter2</tt> </tt>
    340. 

  340. <a name="L275"></a><tt class="py-lineno">275</tt>  <tt class="py-line">            <tt class="py-name">stemmer</tt> <tt class="py-op">=</tt> <tt class="py-name">porter2</tt> </tt>
    341. 

  341. <a name="L276"></a><tt class="py-lineno">276</tt>  <tt class="py-line">        <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">stemmer</tt> <tt class="py-op">=</tt> <tt class="py-name">stemmer</tt> </tt>
    342. 

  342. </div><a name="L277"></a><tt class="py-lineno">277</tt>  <tt class="py-line"> </tt>
    343. 

  343. <a name="Stemmer.__call__"></a><div id="Stemmer.__call__-def"><a name="L278"></a><tt class="py-lineno">278</tt> <a class="py-toggle" href="#" id="Stemmer.__call__-toggle" onclick="return toggle('Stemmer.__call__');">-</a><tt class="py-line">    <tt class="py-keyword">def</tt> <a class="py-def-name" href="tagger.Stemmer-class.html#__call__">__call__</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">tag</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
    344. 

  344. </div><div id="Stemmer.__call__-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="Stemmer.__call__-expanded"><a name="L279"></a><tt class="py-lineno">279</tt>  <tt class="py-line">        <tt class="py-docstring">'''</tt> </tt>
    345. 

  345. <a name="L280"></a><tt class="py-lineno">280</tt>  <tt class="py-line"><tt class="py-docstring">        @param tag: the tag to be stemmed</tt> </tt>
    346. 

  346. <a name="L281"></a><tt class="py-lineno">281</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
    347. 

  347. <a name="L282"></a><tt class="py-lineno">282</tt>  <tt class="py-line"><tt class="py-docstring">        @returns: the stemmed tag</tt> </tt>
    348. 

  348. <a name="L283"></a><tt class="py-lineno">283</tt>  <tt class="py-line"><tt class="py-docstring">        '''</tt> </tt>
    349. 

  349. <a name="L284"></a><tt class="py-lineno">284</tt>  <tt class="py-line"> </tt>
    350. 

  350. <a name="L285"></a><tt class="py-lineno">285</tt>  <tt class="py-line">        <tt class="py-name
    351.