xapian 通过python创建索引数据库的复杂一些的范例，xapianpython,#!/usr/bin/e

xapian 通过python创建索引数据库的复杂一些的范例，xapianpython,#!/usr/bin/e

#!/usr/bin/env python## Index each paragraph of a text file as a Xapian document.# Include some values that will be of use later.## 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 xapianimport stringimport timeif len(sys.argv) != 2:    print >> sys.stderr, "Usage: %s PATH_TO_DATABASE" % sys.argv[0]    sys.exit(1)try:    # Open the database for update, creating a new database if necessary.    database = xapian.WritableDatabase(sys.argv[1], xapian.DB_CREATE_OR_OPEN)    indexer = xapian.TermGenerator()    stemmer = xapian.Stem("english")    indexer.set_stemmer(stemmer)    para = ''    try:        for line in sys.stdin:            line = string.strip(line)            if line == '':                if para != '':                    # We've reached the end of a paragraph, so index it.                    doc = xapian.Document()                    doc.set_data(para)                    indexer.set_document(doc)                    tcount = indexer.get_termpos()                    indexer.index_text(para)                    tcount = indexer.get_termpos() - tcount                    # Include two values: the length of the indexed paragraph                    # (in characters), and the number of terms generated.                    doc.add_value(0, xapian.sortable_serialise(len(para)))                    doc.add_value(1, xapian.sortable_serialise(tcount))                    # Add the document to the database.                    database.add_document(doc)                    para = ''            else:                if para != '':                    para += ' '                para += line    except StopIteration:        passexcept Exception, e:    print >> sys.stderr, "Exception: %s" % str(e)    import traceback    traceback.print_exc()    sys.exit(1)