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<div class="section" id="examples">
<h1>Examples<a class="headerlink" href="#examples" title="Permalink to this headline">¶</a></h1>
<div class="section" id="simplesearch-py">
<span id="simplesearch"></span><h2>simplesearch.py<a class="headerlink" href="#simplesearch-py" title="Permalink to this headline">¶</a></h2>
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65</pre></div></td><td class="code"><div class="highlight"><pre><span class="c">#!/usr/bin/env python</span>
<span class="c">#</span>
<span class="c"># Simple command-line search script.</span>
<span class="c">#</span>
<span class="c"># Copyright (C) 2003 James Aylett</span>
<span class="c"># Copyright (C) 2004,2007,2009,2013 Olly Betts</span>
<span class="c">#</span>
<span class="c"># This program is free software; you can redistribute it and/or</span>
<span class="c"># modify it under the terms of the GNU General Public License as</span>
<span class="c"># published by the Free Software Foundation; either version 2 of the</span>
<span class="c"># License, or (at your option) any later version.</span>
<span class="hll"><span class="c">#</span>
</span><span class="c"># This program is distributed in the hope that it will be useful,</span>
<span class="c"># but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<span class="hll"><span class="c"># MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
</span><span class="hll"><span class="c"># GNU General Public License for more details.</span>
</span><span class="hll"><span class="c">#</span>
</span><span class="hll"><span class="c"># You should have received a copy of the GNU General Public License</span>
</span><span class="c"># along with this program; if not, write to the Free Software</span>
<span class="c"># Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301</span>
<span class="c"># USA</span>
<span class="kn">import</span> <span class="nn">sys</span>
<span class="kn">import</span> <span class="nn">xapian</span>
<span class="c"># We require at least two command line arguments.</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">)</span> <span class="o"><</span> <span class="mi">3</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s">"Usage: </span><span class="si">%s</span><span class="s"> PATH_TO_DATABASE QUERY"</span> <span class="o">%</span> <span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="nb">file</span><span class="o">=</span><span class="n">sys</span><span class="o">.</span><span class="n">stderr</span><span class="p">)</span>
<span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="c"># Open the database for searching.</span>
<span class="n">database</span> <span class="o">=</span> <span class="n">xapian</span><span class="o">.</span><span class="n">Database</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span>
<span class="c"># Start an enquire session.</span>
<span class="n">enquire</span> <span class="o">=</span> <span class="n">xapian</span><span class="o">.</span><span class="n">Enquire</span><span class="p">(</span><span class="n">database</span><span class="p">)</span>
<span class="c"># Combine the rest of the command line arguments with spaces between</span>
<span class="c"># them, so that simple queries don't have to be quoted at the shell</span>
<span class="c"># level.</span>
<span class="n">query_string</span> <span class="o">=</span> <span class="nb">str</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="s">' '</span><span class="p">,</span> <span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">2</span><span class="p">:])</span>
<span class="c"># Parse the query string to produce a Xapian::Query object.</span>
<span class="n">qp</span> <span class="o">=</span> <span class="n">xapian</span><span class="o">.</span><span class="n">QueryParser</span><span class="p">()</span>
<span class="n">stemmer</span> <span class="o">=</span> <span class="n">xapian</span><span class="o">.</span><span class="n">Stem</span><span class="p">(</span><span class="s">"english"</span><span class="p">)</span>
<span class="n">qp</span><span class="o">.</span><span class="n">set_stemmer</span><span class="p">(</span><span class="n">stemmer</span><span class="p">)</span>
<span class="n">qp</span><span class="o">.</span><span class="n">set_database</span><span class="p">(</span><span class="n">database</span><span class="p">)</span>
<span class="n">qp</span><span class="o">.</span><span class="n">set_stemming_strategy</span><span class="p">(</span><span class="n">xapian</span><span class="o">.</span><span class="n">QueryParser</span><span class="o">.</span><span class="n">STEM_SOME</span><span class="p">)</span>
<span class="n">query</span> <span class="o">=</span> <span class="n">qp</span><span class="o">.</span><span class="n">parse_query</span><span class="p">(</span><span class="n">query_string</span><span class="p">)</span>
<span class="k">print</span><span class="p">(</span><span class="s">"Parsed query is: </span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span> <span class="nb">str</span><span class="p">(</span><span class="n">query</span><span class="p">))</span>
<span class="c"># Find the top 10 results for the query.</span>
<span class="n">enquire</span><span class="o">.</span><span class="n">set_query</span><span class="p">(</span><span class="n">query</span><span class="p">)</span>
<span class="n">matches</span> <span class="o">=</span> <span class="n">enquire</span><span class="o">.</span><span class="n">get_mset</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">10</span><span class="p">)</span>
<span class="c"># Display the results.</span>
<span class="k">print</span><span class="p">(</span><span class="s">"</span><span class="si">%i</span><span class="s"> results found."</span> <span class="o">%</span> <span class="n">matches</span><span class="o">.</span><span class="n">get_matches_estimated</span><span class="p">())</span>
<span class="k">print</span><span class="p">(</span><span class="s">"Results 1-</span><span class="si">%i</span><span class="s">:"</span> <span class="o">%</span> <span class="n">matches</span><span class="o">.</span><span class="n">size</span><span class="p">())</span>
<span class="k">for</span> <span class="n">m</span> <span class="ow">in</span> <span class="n">matches</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s">"</span><span class="si">%i</span><span class="s">: </span><span class="si">%i%%</span><span class="s"> docid=</span><span class="si">%i</span><span class="s"> [</span><span class="si">%s</span><span class="s">]"</span> <span class="o">%</span> <span class="p">(</span><span class="n">m</span><span class="o">.</span><span class="n">rank</span> <span class="o">+</span> <span class="mi">1</span><span class="p">,</span> <span class="n">m</span><span class="o">.</span><span class="n">percent</span><span class="p">,</span> <span class="n">m</span><span class="o">.</span><span class="n">docid</span><span class="p">,</span> <span class="n">m</span><span class="o">.</span><span class="n">document</span><span class="o">.</span><span class="n">get_data</span><span class="p">()</span><span class="o">.</span><span class="n">decode</span><span class="p">(</span><span class="s">'utf-8'</span><span class="p">)))</span>
<span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s">"Exception: </span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span> <span class="nb">str</span><span class="p">(</span><span class="n">e</span><span class="p">),</span> <span class="nb">file</span><span class="o">=</span><span class="n">sys</span><span class="o">.</span><span class="n">stderr</span><span class="p">)</span>
<span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
</pre></div>
</td></tr></table></div>
</div>
<div class="section" id="simpleindex-py">
<span id="simpleindex"></span><h2>simpleindex.py<a class="headerlink" href="#simpleindex-py" title="Permalink to this headline">¶</a></h2>
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<span class="c">#</span>
<span class="c"># Index each paragraph of a text file as a Xapian document.</span>
<span class="c">#</span>
<span class="c"># Copyright (C) 2003 James Aylett</span>
<span class="c"># Copyright (C) 2004,2007,2013,2014 Olly Betts</span>
<span class="c">#</span>
<span class="c"># This program is free software; you can redistribute it and/or</span>
<span class="c"># modify it under the terms of the GNU General Public License as</span>
<span class="c"># published by the Free Software Foundation; either version 2 of the</span>
<span class="c"># License, or (at your option) any later version.</span>
<span class="hll"><span class="c">#</span>
</span><span class="c"># This program is distributed in the hope that it will be useful,</span>
<span class="c"># but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<span class="hll"><span class="c"># MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
</span><span class="hll"><span class="c"># GNU General Public License for more details.</span>
</span><span class="hll"><span class="c">#</span>
</span><span class="hll"><span class="c"># You should have received a copy of the GNU General Public License</span>
</span><span class="c"># along with this program; if not, write to the Free Software</span>
<span class="c"># Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301</span>
<span class="c"># USA</span>
<span class="kn">import</span> <span class="nn">sys</span>
<span class="kn">import</span> <span class="nn">xapian</span>
<span class="kn">import</span> <span class="nn">string</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">2</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s">"Usage: </span><span class="si">%s</span><span class="s"> PATH_TO_DATABASE"</span> <span class="o">%</span> <span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="nb">file</span><span class="o">=</span><span class="n">sys</span><span class="o">.</span><span class="n">stderr</span><span class="p">)</span>
<span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="c"># Open the database for update, creating a new database if necessary.</span>
<span class="n">database</span> <span class="o">=</span> <span class="n">xapian</span><span class="o">.</span><span class="n">WritableDatabase</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="n">xapian</span><span class="o">.</span><span class="n">DB_CREATE_OR_OPEN</span><span class="p">)</span>
<span class="n">indexer</span> <span class="o">=</span> <span class="n">xapian</span><span class="o">.</span><span class="n">TermGenerator</span><span class="p">()</span>
<span class="n">stemmer</span> <span class="o">=</span> <span class="n">xapian</span><span class="o">.</span><span class="n">Stem</span><span class="p">(</span><span class="s">"english"</span><span class="p">)</span>
<span class="n">indexer</span><span class="o">.</span><span class="n">set_stemmer</span><span class="p">(</span><span class="n">stemmer</span><span class="p">)</span>
<span class="n">para</span> <span class="o">=</span> <span class="s">''</span>
<span class="k">try</span><span class="p">:</span>
<span class="k">for</span> <span class="n">line</span> <span class="ow">in</span> <span class="n">sys</span><span class="o">.</span><span class="n">stdin</span><span class="p">:</span>
<span class="n">line</span> <span class="o">=</span> <span class="n">line</span><span class="o">.</span><span class="n">strip</span><span class="p">()</span>
<span class="k">if</span> <span class="n">line</span> <span class="o">==</span> <span class="s">''</span><span class="p">:</span>
<span class="k">if</span> <span class="n">para</span> <span class="o">!=</span> <span class="s">''</span><span class="p">:</span>
<span class="c"># We've reached the end of a paragraph, so index it.</span>
<span class="n">doc</span> <span class="o">=</span> <span class="n">xapian</span><span class="o">.</span><span class="n">Document</span><span class="p">()</span>
<span class="n">doc</span><span class="o">.</span><span class="n">set_data</span><span class="p">(</span><span class="n">para</span><span class="p">)</span>
<span class="n">indexer</span><span class="o">.</span><span class="n">set_document</span><span class="p">(</span><span class="n">doc</span><span class="p">)</span>
<span class="n">indexer</span><span class="o">.</span><span class="n">index_text</span><span class="p">(</span><span class="n">para</span><span class="p">)</span>
<span class="c"># Add the document to the database.</span>
<span class="n">database</span><span class="o">.</span><span class="n">add_document</span><span class="p">(</span><span class="n">doc</span><span class="p">)</span>
<span class="n">para</span> <span class="o">=</span> <span class="s">''</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">if</span> <span class="n">para</span> <span class="o">!=</span> <span class="s">''</span><span class="p">:</span>
<span class="n">para</span> <span class="o">+=</span> <span class="s">' '</span>
<span class="n">para</span> <span class="o">+=</span> <span class="n">line</span>
<span class="k">except</span> <span class="ne">StopIteration</span><span class="p">:</span>
<span class="k">pass</span>
<span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s">"Exception: </span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span> <span class="nb">str</span><span class="p">(</span><span class="n">e</span><span class="p">),</span> <span class="nb">file</span><span class="o">=</span><span class="n">sys</span><span class="o">.</span><span class="n">stderr</span><span class="p">)</span>
<span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
</pre></div>
</td></tr></table></div>
</div>
<div class="section" id="simpleexpand-py">
<span id="simpleexpand"></span><h2>simpleexpand.py<a class="headerlink" href="#simpleexpand-py" title="Permalink to this headline">¶</a></h2>
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<span class="c">#</span>
<span class="c"># Simple example script demonstrating query expansion.</span>
<span class="c">#</span>
<span class="c"># Copyright (C) 2003 James Aylett</span>
<span class="c"># Copyright (C) 2004,2006,2007,2012,2013,2014 Olly Betts</span>
<span class="c">#</span>
<span class="c"># This program is free software; you can redistribute it and/or</span>
<span class="c"># modify it under the terms of the GNU General Public License as</span>
<span class="c"># published by the Free Software Foundation; either version 2 of the</span>
<span class="c"># License, or (at your option) any later version.</span>
<span class="hll"><span class="c">#</span>
</span><span class="c"># This program is distributed in the hope that it will be useful,</span>
<span class="c"># but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<span class="hll"><span class="c"># MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
</span><span class="hll"><span class="c"># GNU General Public License for more details.</span>
</span><span class="hll"><span class="c">#</span>
</span><span class="hll"><span class="c"># You should have received a copy of the GNU General Public License</span>
</span><span class="c"># along with this program; if not, write to the Free Software</span>
<span class="c"># Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301</span>
<span class="c"># USA</span>
<span class="kn">import</span> <span class="nn">sys</span>
<span class="kn">import</span> <span class="nn">xapian</span>
<span class="c"># We require at least two command line arguments.</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">)</span> <span class="o"><</span> <span class="mi">3</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s">"Usage: </span><span class="si">%s</span><span class="s"> PATH_TO_DATABASE QUERY [-- [DOCID...]]"</span> <span class="o">%</span> <span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="nb">file</span><span class="o">=</span><span class="n">sys</span><span class="o">.</span><span class="n">stderr</span><span class="p">)</span>
<span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="c"># Open the database for searching.</span>
<span class="n">database</span> <span class="o">=</span> <span class="n">xapian</span><span class="o">.</span><span class="n">Database</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span>
<span class="c"># Start an enquire session.</span>
<span class="n">enquire</span> <span class="o">=</span> <span class="n">xapian</span><span class="o">.</span><span class="n">Enquire</span><span class="p">(</span><span class="n">database</span><span class="p">)</span>
<span class="c"># Combine command line arguments up to "--" with spaces between</span>
<span class="c"># them, so that simple queries don't have to be quoted at the shell</span>
<span class="c"># level.</span>
<span class="n">query_string</span> <span class="o">=</span> <span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span>
<span class="n">index</span> <span class="o">=</span> <span class="mi">3</span>
<span class="k">while</span> <span class="n">index</span> <span class="o"><</span> <span class="nb">len</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">):</span>
<span class="n">arg</span> <span class="o">=</span> <span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="n">index</span><span class="p">]</span>
<span class="n">index</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="k">if</span> <span class="n">arg</span> <span class="o">==</span> <span class="s">'--'</span><span class="p">:</span>
<span class="c"># Passed marker, move to parsing relevant docids.</span>
<span class="k">break</span>
<span class="n">query_string</span> <span class="o">+=</span> <span class="s">' '</span>
<span class="n">query_string</span> <span class="o">+=</span> <span class="n">arg</span>
<span class="c"># Create an RSet with the listed docids in.</span>
<span class="n">reldocs</span> <span class="o">=</span> <span class="n">xapian</span><span class="o">.</span><span class="n">RSet</span><span class="p">()</span>
<span class="k">for</span> <span class="n">index</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">index</span><span class="p">,</span> <span class="nb">len</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">)):</span>
<span class="n">reldocs</span><span class="o">.</span><span class="n">add_document</span><span class="p">(</span><span class="nb">int</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="n">index</span><span class="p">]))</span>
<span class="c"># Parse the query string to produce a Xapian::Query object.</span>
<span class="n">qp</span> <span class="o">=</span> <span class="n">xapian</span><span class="o">.</span><span class="n">QueryParser</span><span class="p">()</span>
<span class="n">stemmer</span> <span class="o">=</span> <span class="n">xapian</span><span class="o">.</span><span class="n">Stem</span><span class="p">(</span><span class="s">"english"</span><span class="p">)</span>
<span class="n">qp</span><span class="o">.</span><span class="n">set_stemmer</span><span class="p">(</span><span class="n">stemmer</span><span class="p">)</span>
<span class="n">qp</span><span class="o">.</span><span class="n">set_database</span><span class="p">(</span><span class="n">database</span><span class="p">)</span>
<span class="n">qp</span><span class="o">.</span><span class="n">set_stemming_strategy</span><span class="p">(</span><span class="n">xapian</span><span class="o">.</span><span class="n">QueryParser</span><span class="o">.</span><span class="n">STEM_SOME</span><span class="p">)</span>
<span class="n">query</span> <span class="o">=</span> <span class="n">qp</span><span class="o">.</span><span class="n">parse_query</span><span class="p">(</span><span class="n">query_string</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">query</span><span class="o">.</span><span class="n">empty</span><span class="p">():</span>
<span class="k">print</span><span class="p">(</span><span class="s">"Parsed query is: </span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span> <span class="nb">str</span><span class="p">(</span><span class="n">query</span><span class="p">))</span>
<span class="c"># Find the top 10 results for the query.</span>
<span class="n">enquire</span><span class="o">.</span><span class="n">set_query</span><span class="p">(</span><span class="n">query</span><span class="p">)</span>
<span class="n">matches</span> <span class="o">=</span> <span class="n">enquire</span><span class="o">.</span><span class="n">get_mset</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">10</span><span class="p">,</span> <span class="n">reldocs</span><span class="p">)</span>
<span class="c"># Display the results.</span>
<span class="k">print</span><span class="p">(</span><span class="s">"</span><span class="si">%i</span><span class="s"> results found."</span> <span class="o">%</span> <span class="n">matches</span><span class="o">.</span><span class="n">get_matches_estimated</span><span class="p">())</span>
<span class="k">print</span><span class="p">(</span><span class="s">"Results 1-</span><span class="si">%i</span><span class="s">:"</span> <span class="o">%</span> <span class="n">matches</span><span class="o">.</span><span class="n">size</span><span class="p">())</span>
<span class="k">for</span> <span class="n">m</span> <span class="ow">in</span> <span class="n">matches</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s">"</span><span class="si">%i</span><span class="s">: </span><span class="si">%i%%</span><span class="s"> docid=</span><span class="si">%i</span><span class="s"> [</span><span class="si">%s</span><span class="s">]"</span> <span class="o">%</span> <span class="p">(</span><span class="n">m</span><span class="o">.</span><span class="n">rank</span> <span class="o">+</span> <span class="mi">1</span><span class="p">,</span> <span class="n">m</span><span class="o">.</span><span class="n">percent</span><span class="p">,</span> <span class="n">m</span><span class="o">.</span><span class="n">docid</span><span class="p">,</span> <span class="n">m</span><span class="o">.</span><span class="n">document</span><span class="o">.</span><span class="n">get_data</span><span class="p">()))</span>
<span class="c"># Put the top 5 (at most) docs into the rset if rset is empty</span>
<span class="k">if</span> <span class="n">reldocs</span><span class="o">.</span><span class="n">empty</span><span class="p">():</span>
<span class="n">rel_count</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">for</span> <span class="n">m</span> <span class="ow">in</span> <span class="n">matches</span><span class="p">:</span>
<span class="n">reldocs</span><span class="o">.</span><span class="n">add_document</span><span class="p">(</span><span class="n">m</span><span class="o">.</span><span class="n">docid</span><span class="p">)</span>
<span class="n">rel_count</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="k">if</span> <span class="n">rel_count</span> <span class="o">==</span> <span class="mi">5</span><span class="p">:</span>
<span class="k">break</span>
<span class="c"># Get the suggested expand terms</span>
<span class="n">eterms</span> <span class="o">=</span> <span class="n">enquire</span><span class="o">.</span><span class="n">get_eset</span><span class="p">(</span><span class="mi">10</span><span class="p">,</span> <span class="n">reldocs</span><span class="p">)</span>
<span class="k">print</span><span class="p">(</span><span class="s">"</span><span class="si">%i</span><span class="s"> suggested additional terms"</span> <span class="o">%</span> <span class="n">eterms</span><span class="o">.</span><span class="n">size</span><span class="p">())</span>
<span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">eterms</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s">"</span><span class="si">%s</span><span class="s">: </span><span class="si">%f</span><span class="s">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">k</span><span class="o">.</span><span class="n">term</span><span class="p">,</span> <span class="n">k</span><span class="o">.</span><span class="n">weight</span><span class="p">))</span>
<span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s">"Exception: </span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span> <span class="nb">str</span><span class="p">(</span><span class="n">e</span><span class="p">),</span> <span class="nb">file</span><span class="o">=</span><span class="n">sys</span><span class="o">.</span><span class="n">stderr</span><span class="p">)</span>
<span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
</pre></div>
</td></tr></table></div>
</div>
<div class="section" id="simplematchdecider-py">
<span id="simplematchdecider"></span><h2>simplematchdecider.py<a class="headerlink" href="#simplematchdecider-py" title="Permalink to this headline">¶</a></h2>
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78</pre></div></td><td class="code"><div class="highlight"><pre><span class="c">#!/usr/bin/env python</span>
<span class="c">#</span>
<span class="c"># Simple command-line match decider example</span>
<span class="c">#</span>
<span class="c"># Copyright (C) 2003 James Aylett</span>
<span class="c"># Copyright (C) 2004,2007,2009,2013 Olly Betts</span>
<span class="c">#</span>
<span class="c"># This program is free software; you can redistribute it and/or</span>
<span class="c"># modify it under the terms of the GNU General Public License as</span>
<span class="c"># published by the Free Software Foundation; either version 2 of the</span>
<span class="c"># License, or (at your option) any later version.</span>
<span class="hll"><span class="c">#</span>
</span><span class="c"># This program is distributed in the hope that it will be useful,</span>
<span class="c"># but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<span class="hll"><span class="c"># MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
</span><span class="hll"><span class="c"># GNU General Public License for more details.</span>
</span><span class="hll"><span class="c">#</span>
</span><span class="hll"><span class="c"># You should have received a copy of the GNU General Public License</span>
</span><span class="c"># along with this program; if not, write to the Free Software</span>
<span class="c"># Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301</span>
<span class="c"># USA</span>
<span class="kn">import</span> <span class="nn">sys</span>
<span class="kn">import</span> <span class="nn">xapian</span>
<span class="c"># This example runs a query like simplesearch does, but uses a MatchDecider</span>
<span class="c"># (mymatchdecider) to discard any document for which value 0 is equal to</span>
<span class="c"># the string passed as the second command line argument.</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">)</span> <span class="o"><</span> <span class="mi">4</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s">"Usage: </span><span class="si">%s</span><span class="s"> PATH_TO_DATABASE AVOID_VALUE QUERY"</span> <span class="o">%</span> <span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="nb">file</span><span class="o">=</span><span class="n">sys</span><span class="o">.</span><span class="n">stderr</span><span class="p">)</span>
<span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
<span class="k">class</span> <span class="nc">mymatchdecider</span><span class="p">(</span><span class="n">xapian</span><span class="o">.</span><span class="n">MatchDecider</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">avoidvalue</span><span class="p">):</span>
<span class="n">xapian</span><span class="o">.</span><span class="n">MatchDecider</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">avoidvalue</span> <span class="o">=</span> <span class="n">avoidvalue</span>
<span class="k">def</span> <span class="nf">__call__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">doc</span><span class="p">):</span>
<span class="k">return</span> <span class="n">doc</span><span class="o">.</span><span class="n">get_value</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span> <span class="o">!=</span> <span class="bp">self</span><span class="o">.</span><span class="n">avoidvalue</span>
<span class="k">try</span><span class="p">:</span>
<span class="c"># Open the database for searching.</span>
<span class="n">database</span> <span class="o">=</span> <span class="n">xapian</span><span class="o">.</span><span class="n">Database</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span>
<span class="c"># Start an enquire session.</span>
<span class="n">enquire</span> <span class="o">=</span> <span class="n">xapian</span><span class="o">.</span><span class="n">Enquire</span><span class="p">(</span><span class="n">database</span><span class="p">)</span>
<span class="c"># Combine the rest of the command line arguments with spaces between</span>
<span class="c"># them, so that simple queries don't have to be quoted at the shell</span>
<span class="c"># level.</span>
<span class="n">avoid_value</span> <span class="o">=</span> <span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span>
<span class="n">query_string</span> <span class="o">=</span> <span class="nb">str</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="s">' '</span><span class="p">,</span> <span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">3</span><span class="p">:])</span>
<span class="c"># Parse the query string to produce a Xapian::Query object.</span>
<span class="n">qp</span> <span class="o">=</span> <span class="n">xapian</span><span class="o">.</span><span class="n">QueryParser</span><span class="p">()</span>
<span class="n">stemmer</span> <span class="o">=</span> <span class="n">xapian</span><span class="o">.</span><span class="n">Stem</span><span class="p">(</span><span class="s">"english"</span><span class="p">)</span>
<span class="n">qp</span><span class="o">.</span><span class="n">set_stemmer</span><span class="p">(</span><span class="n">stemmer</span><span class="p">)</span>
<span class="n">qp</span><span class="o">.</span><span class="n">set_database</span><span class="p">(</span><span class="n">database</span><span class="p">)</span>
<span class="n">qp</span><span class="o">.</span><span class="n">set_stemming_strategy</span><span class="p">(</span><span class="n">xapian</span><span class="o">.</span><span class="n">QueryParser</span><span class="o">.</span><span class="n">STEM_SOME</span><span class="p">)</span>
<span class="n">query</span> <span class="o">=</span> <span class="n">qp</span><span class="o">.</span><span class="n">parse_query</span><span class="p">(</span><span class="n">query_string</span><span class="p">)</span>
<span class="k">print</span><span class="p">(</span><span class="s">"Parsed query is: </span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span> <span class="nb">str</span><span class="p">(</span><span class="n">query</span><span class="p">))</span>
<span class="c"># Find the top 10 results for the query.</span>
<span class="n">enquire</span><span class="o">.</span><span class="n">set_query</span><span class="p">(</span><span class="n">query</span><span class="p">)</span>
<span class="n">mdecider</span> <span class="o">=</span> <span class="n">mymatchdecider</span><span class="p">(</span><span class="n">avoid_value</span><span class="p">)</span>
<span class="n">matches</span> <span class="o">=</span> <span class="n">enquire</span><span class="o">.</span><span class="n">get_mset</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">10</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="n">mdecider</span><span class="p">)</span>
<span class="c"># Display the results.</span>
<span class="k">print</span><span class="p">(</span><span class="s">"</span><span class="si">%i</span><span class="s"> results found."</span> <span class="o">%</span> <span class="n">matches</span><span class="o">.</span><span class="n">get_matches_estimated</span><span class="p">())</span>
<span class="k">print</span><span class="p">(</span><span class="s">"Results 1-</span><span class="si">%i</span><span class="s">:"</span> <span class="o">%</span> <span class="n">matches</span><span class="o">.</span><span class="n">size</span><span class="p">())</span>
<span class="k">for</span> <span class="n">m</span> <span class="ow">in</span> <span class="n">matches</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s">"</span><span class="si">%i</span><span class="s">: </span><span class="si">%i%%</span><span class="s"> docid=</span><span class="si">%i</span><span class="s"> [</span><span class="si">%s</span><span class="s">]"</span> <span class="o">%</span> <span class="p">(</span><span class="n">m</span><span class="o">.</span><span class="n">rank</span> <span class="o">+</span> <span class="mi">1</span><span class="p">,</span> <span class="n">m</span><span class="o">.</span><span class="n">percent</span><span class="p">,</span> <span class="n">m</span><span class="o">.</span><span class="n">docid</span><span class="p">,</span> <span class="n">m</span><span class="o">.</span><span class="n">document</span><span class="o">.</span><span class="n">get_data</span><span class="p">()))</span>
<span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
<span class="k">print</span><span class="p">(</span><span class="s">"Exception: </span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span> <span class="nb">str</span><span class="p">(</span><span class="n">e</span><span class="p">),</span> <span class="nb">file</span><span class="o">=</span><span class="n">sys</span><span class="o">.</span><span class="n">stderr</span><span class="p">)</span>
<span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
</pre></div>
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<li><a class="reference internal" href="#">Examples</a><ul>
<li><a class="reference internal" href="#simplesearch-py">simplesearch.py</a></li>
<li><a class="reference internal" href="#simpleindex-py">simpleindex.py</a></li>
<li><a class="reference internal" href="#simpleexpand-py">simpleexpand.py</a></li>
<li><a class="reference internal" href="#simplematchdecider-py">simplematchdecider.py</a></li>
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