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 <section id="examples">
<h1>Examples<a class="headerlink" href="#examples" title="Permalink to this headline">¶</a></h1>
<section id="simplesearch-py">
<h2>simplesearch.py<a class="headerlink" href="#simplesearch-py" title="Permalink to this headline">¶</a></h2>
<div class="highlight-python notranslate"><div class="highlight"><pre> 1#!/usr/bin/env python
 2#
 3# Simple command-line search script.
 4#
 5# Copyright (C) 2003 James Aylett
 6# Copyright (C) 2004,2007,2009,2013 Olly Betts
 7#
 8# This program is free software; you can redistribute it and/or
 9# modify it under the terms of the GNU General Public License as
10# published by the Free Software Foundation; either version 2 of the
11# License, or (at your option) any later version.
12#
13# This program is distributed in the hope that it will be useful,
14# but WITHOUT ANY WARRANTY; without even the implied warranty of
15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16# GNU General Public License for more details.
17#
18# You should have received a copy of the GNU General Public License
19# along with this program; if not, write to the Free Software
20# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
21# USA
22
23import sys
24import xapian
25
26# We require at least two command line arguments.
27if len(sys.argv) &lt; 3:
28 print(&quot;Usage: %s PATH_TO_DATABASE QUERY&quot; % sys.argv[0], file=sys.stderr)
29 sys.exit(1)
30
31try:
32 # Open the database for searching.
33 database = xapian.Database(sys.argv[1])
34
35 # Start an enquire session.
36 enquire = xapian.Enquire(database)
37
38 # Combine the rest of the command line arguments with spaces between
39 # them, so that simple queries don&#39;t have to be quoted at the shell
40 # level.
41 query_string = str.join(&#39; &#39;, sys.argv[2:])
42
43 # Parse the query string to produce a Xapian::Query object.
44 qp = xapian.QueryParser()
45 stemmer = xapian.Stem(&quot;english&quot;)
46 qp.set_stemmer(stemmer)
47 qp.set_database(database)
48 qp.set_stemming_strategy(xapian.QueryParser.STEM_SOME)
49 query = qp.parse_query(query_string)
50 print(&quot;Parsed query is: %s&quot; % str(query))
51
52 # Find the top 10 results for the query.
53 enquire.set_query(query)
54 matches = enquire.get_mset(0, 10)
55
56 # Display the results.
57 print(&quot;%i results found.&quot; % matches.get_matches_estimated())
58 print(&quot;Results 1-%i:&quot; % matches.size())
59
60 for m in matches:
61 print(&quot;%i: %i%% docid=%i [%s]&quot; % (m.rank + 1, m.percent, m.docid, m.document.get_data().decode(&#39;utf-8&#39;)))
62
63except Exception as e:
64 print(&quot;Exception: %s&quot; % str(e), file=sys.stderr)
65 sys.exit(1)
</pre></div>
</div>
</section>
<section id="simpleindex-py">
<h2>simpleindex.py<a class="headerlink" href="#simpleindex-py" title="Permalink to this headline">¶</a></h2>
<div class="highlight-python notranslate"><div class="highlight"><pre> 1#!/usr/bin/env python
 2#
 3# Index each paragraph of a text file as a Xapian document.
 4#
 5# Copyright (C) 2003 James Aylett
 6# Copyright (C) 2004,2007,2013,2014 Olly Betts
 7#
 8# This program is free software; you can redistribute it and/or
 9# modify it under the terms of the GNU General Public License as
10# published by the Free Software Foundation; either version 2 of the
11# License, or (at your option) any later version.
12#
13# This program is distributed in the hope that it will be useful,
14# but WITHOUT ANY WARRANTY; without even the implied warranty of
15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16# GNU General Public License for more details.
17#
18# You should have received a copy of the GNU General Public License
19# along with this program; if not, write to the Free Software
20# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
21# USA
22
23import sys
24import xapian
25import string
26
27if len(sys.argv) != 2:
28 print(&quot;Usage: %s PATH_TO_DATABASE&quot; % sys.argv[0], file=sys.stderr)
29 sys.exit(1)
30
31try:
32 # Open the database for update, creating a new database if necessary.
33 database = xapian.WritableDatabase(sys.argv[1], xapian.DB_CREATE_OR_OPEN)
34
35 indexer = xapian.TermGenerator()
36 stemmer = xapian.Stem(&quot;english&quot;)
37 indexer.set_stemmer(stemmer)
38
39 para = &#39;&#39;
40 try:
41 for line in sys.stdin:
42 line = line.strip()
43 if line == &#39;&#39;:
44 if para != &#39;&#39;:
45 # We&#39;ve reached the end of a paragraph, so index it.
46 doc = xapian.Document()
47 doc.set_data(para)
48
49 indexer.set_document(doc)
50 indexer.index_text(para)
51
52 # Add the document to the database.
53 database.add_document(doc)
54 para = &#39;&#39;
55 else:
56 if para != &#39;&#39;:
57 para += &#39; &#39;
58 para += line
59 except StopIteration:
60 pass
61
62except Exception as e:
63 print(&quot;Exception: %s&quot; % str(e), file=sys.stderr)
64 sys.exit(1)
</pre></div>
</div>
</section>
<section id="simpleexpand-py">
<h2>simpleexpand.py<a class="headerlink" href="#simpleexpand-py" title="Permalink to this headline">¶</a></h2>
<div class="highlight-python notranslate"><div class="highlight"><pre> 1#!/usr/bin/env python
 2#
 3# Simple example script demonstrating query expansion.
 4#
 5# Copyright (C) 2003 James Aylett
 6# Copyright (C) 2004,2006,2007,2012,2013,2014 Olly Betts
 7#
 8# This program is free software; you can redistribute it and/or
 9# modify it under the terms of the GNU General Public License as
10# published by the Free Software Foundation; either version 2 of the
11# License, or (at your option) any later version.
12#
13# This program is distributed in the hope that it will be useful,
14# but WITHOUT ANY WARRANTY; without even the implied warranty of
15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16# GNU General Public License for more details.
17#
18# You should have received a copy of the GNU General Public License
19# along with this program; if not, write to the Free Software
20# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
21# USA
22
23import sys
24import xapian
25
26# We require at least two command line arguments.
27if len(sys.argv) &lt; 3:
28 print(&quot;Usage: %s PATH_TO_DATABASE QUERY [-- [DOCID...]]&quot; % sys.argv[0], file=sys.stderr)
29 sys.exit(1)
30
31try:
32 # Open the database for searching.
33 database = xapian.Database(sys.argv[1])
34
35 # Start an enquire session.
36 enquire = xapian.Enquire(database)
37
38 # Combine command line arguments up to &quot;--&quot; with spaces between
39 # them, so that simple queries don&#39;t have to be quoted at the shell
40 # level.
41 query_string = sys.argv[2]
42 index = 3
43 while index &lt; len(sys.argv):
44 arg = sys.argv[index]
45 index += 1
46 if arg == &#39;--&#39;:
47 # Passed marker, move to parsing relevant docids.
48 break
49 query_string += &#39; &#39;
50 query_string += arg
51
52 # Create an RSet with the listed docids in.
53 reldocs = xapian.RSet()
54 for index in range(index, len(sys.argv)):
55 reldocs.add_document(int(sys.argv[index]))
56
57 # Parse the query string to produce a Xapian::Query object.
58 qp = xapian.QueryParser()
59 stemmer = xapian.Stem(&quot;english&quot;)
60 qp.set_stemmer(stemmer)
61 qp.set_database(database)
62 qp.set_stemming_strategy(xapian.QueryParser.STEM_SOME)
63 query = qp.parse_query(query_string)
64
65 if not query.empty():
66 print(&quot;Parsed query is: %s&quot; % str(query))
67
68 # Find the top 10 results for the query.
69 enquire.set_query(query)
70 matches = enquire.get_mset(0, 10, reldocs)
71
72 # Display the results.
73 print(&quot;%i results found.&quot; % matches.get_matches_estimated())
74 print(&quot;Results 1-%i:&quot; % matches.size())
75
76 for m in matches:
77 print(&quot;%i: %i%% docid=%i [%s]&quot; % (m.rank + 1, m.percent, m.docid, m.document.get_data()))
78
79 # Put the top 5 (at most) docs into the rset if rset is empty
80 if reldocs.empty():
81 rel_count = 0
82 for m in matches:
83 reldocs.add_document(m.docid)
84 rel_count += 1
85 if rel_count == 5:
86 break
87
88 # Get the suggested expand terms
89 eterms = enquire.get_eset(10, reldocs)
90 print(&quot;%i suggested additional terms&quot; % eterms.size())
91 for k in eterms:
92 print(&quot;%s: %f&quot; % (k.term, k.weight))
93
94except Exception as e:
95 print(&quot;Exception: %s&quot; % str(e), file=sys.stderr)
96 sys.exit(1)
</pre></div>
</div>
</section>
<section id="simplematchdecider-py">
<h2>simplematchdecider.py<a class="headerlink" href="#simplematchdecider-py" title="Permalink to this headline">¶</a></h2>
<div class="highlight-python notranslate"><div class="highlight"><pre> 1#!/usr/bin/env python
 2#
 3# Simple command-line match decider example
 4#
 5# Copyright (C) 2003 James Aylett
 6# Copyright (C) 2004,2007,2009,2013 Olly Betts
 7#
 8# This program is free software; you can redistribute it and/or
 9# modify it under the terms of the GNU General Public License as
10# published by the Free Software Foundation; either version 2 of the
11# License, or (at your option) any later version.
12#
13# This program is distributed in the hope that it will be useful,
14# but WITHOUT ANY WARRANTY; without even the implied warranty of
15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16# GNU General Public License for more details.
17#
18# You should have received a copy of the GNU General Public License
19# along with this program; if not, write to the Free Software
20# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
21# USA
22
23import sys
24import xapian
25
26# This example runs a query like simplesearch does, but uses a MatchDecider
27# (mymatchdecider) to discard any document for which value 0 is equal to
28# the string passed as the second command line argument.
29
30if len(sys.argv) &lt; 4:
31 print(&quot;Usage: %s PATH_TO_DATABASE AVOID_VALUE QUERY&quot; % sys.argv[0], file=sys.stderr)
32 sys.exit(1)
33
34class mymatchdecider(xapian.MatchDecider):
35 def __init__(self, avoidvalue):
36 xapian.MatchDecider.__init__(self)
37 self.avoidvalue = avoidvalue
38
39 def __call__(self, doc):
40 return doc.get_value(0) != self.avoidvalue
41
42try:
43 # Open the database for searching.
44 database = xapian.Database(sys.argv[1])
45
46 # Start an enquire session.
47 enquire = xapian.Enquire(database)
48
49 # Combine the rest of the command line arguments with spaces between
50 # them, so that simple queries don&#39;t have to be quoted at the shell
51 # level.
52 avoid_value = sys.argv[2]
53 query_string = str.join(&#39; &#39;, sys.argv[3:])
54
55 # Parse the query string to produce a Xapian::Query object.
56 qp = xapian.QueryParser()
57 stemmer = xapian.Stem(&quot;english&quot;)
58 qp.set_stemmer(stemmer)
59 qp.set_database(database)
60 qp.set_stemming_strategy(xapian.QueryParser.STEM_SOME)
61 query = qp.parse_query(query_string)
62 print(&quot;Parsed query is: %s&quot; % str(query))
63
64 # Find the top 10 results for the query.
65 enquire.set_query(query)
66 mdecider = mymatchdecider(avoid_value)
67 matches = enquire.get_mset(0, 10, None, mdecider)
68
69 # Display the results.
70 print(&quot;%i results found.&quot; % matches.get_matches_estimated())
71 print(&quot;Results 1-%i:&quot; % matches.size())
72
73 for m in matches:
74 print(&quot;%i: %i%% docid=%i [%s]&quot; % (m.rank + 1, m.percent, m.docid, m.document.get_data()))
75
76except Exception as e:
77 print(&quot;Exception: %s&quot; % str(e), file=sys.stderr)
78 sys.exit(1)
</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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