xapian通过python实现的一个简单的范围查询的例子，xapianpython,#!/usr/bin/e

xapian通过python实现的一个简单的范围查询的例子，xapianpython,#!/usr/bin/e

#!/usr/bin/env python## Simple command-line ValueRangeProcessor example. Takes as an argument# the value number to apply numeric ranges to.## Copyright (C) 2003,2008 James Aylett# Copyright (C) 2004,2007 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# USAimport sysimport xapian# We require at least three command line arguments.if len(sys.argv) < 4:    print >> sys.stderr, "Usage: %s PATH_TO_DATABASE VALUENO QUERY" % sys.argv[0]    sys.exit(1)# 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.query_string = " ".join(sys.argv[3:])# Set up a NumberValueRangeProcessor on the right value# It *must* be prefixed by '%' in the query (just to show how this is done).rangeproc = xapian.NumberValueRangeProcessor(int(sys.argv[2]), '%')# Parse the query string to produce a Xapian::Query object.qp = xapian.QueryParser()qp.add_valuerangeprocessor(rangeproc)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)matches = enquire.get_mset(0, 10)# 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())