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#!/usr/bin/env python # # Simple command-line match decider example # # Copyright (C) 2003 James Aylett # Copyright (C) 2004,2007,2009 Olly Betts # # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License as # published by the Free Software Foundation; either version 2 of the # License, or (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 # USA
import sys import xapian
# This example runs a query like simplesearch does, but uses a MatchDecider # (mymatchdecider) to discard any document for which value 0 is equal to # the string passed as the second command line argument.
if len(sys.argv) < 4: print >> sys.stderr, "Usage: %s PATH_TO_DATABASE AVOID_VALUE QUERY" % sys.argv[0] sys.exit(1)
class mymatchdecider(xapian.MatchDecider): def __init__(self, avoidvalue): xapian.MatchDecider.__init__(self) self.avoidvalue = avoidvalue def __call__(self, doc): return doc.get_value(0) != self.avoidvalue
try: # Open the database for searching. database = xapian.Database(sys.argv[1])
# Start an enquire session. enquire = xapian.Enquire(database)
# Combine the rest of the command line arguments with spaces between # them, so that simple queries don't have to be quoted at the shell # level. avoid_value = sys.argv[2] query_string = str.join(' ', sys.argv[3:])
# Parse the query string to produce a Xapian::Query object. qp = xapian.QueryParser() stemmer = xapian.Stem("english") qp.set_stemmer(stemmer) qp.set_database(database) qp.set_stemming_strategy(xapian.QueryParser.STEM_SOME) query = qp.parse_query(query_string) print "Parsed query is: %s" % str(query)
# Find the top 10 results for the query. enquire.set_query(query) mdecider = mymatchdecider(avoid_value) matches = enquire.get_mset(0, 10, None, mdecider)
# Display the results. print "%i results found." % matches.get_matches_estimated() print "Results 1-%i:" % matches.size()
for m in matches: print "%i: %i%% docid=%i [%s]" % (m.rank + 1, m.percent, m.docid, m.document.get_data())
except Exception, e: print >> sys.stderr, "Exception: %s" % str(e) sys.exit(1)
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