# The contents of this file are subject to the BitTorrent Open Source License# Version 1.0 (the License).  You may not copy or use this file, in either# source code or executable form, except in compliance with the License.  You# may obtain a copy of the License at http://www.bittorrent.com/license/.## Software distributed under the License is distributed on an AS IS basis,# WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the License# for the specific language governing rights and limitations under the# License.import rematches = (           ('-AZ(?P<version>\d+)-+.+$'     , "Azureus"             ),           ('M(?P<version>\d-\d-\d)--.+$'  , "BitTorrent"          ),           ('T(?P<version>\d+)-+.+$'       , "BitTornado"          ),           ('-TS(?P<version>\d+)-+.+$'     , "TorrentStorm"        ),           ('S(?P<version>\d+[\dAB])-+.+$' , "Shadow's"            ),           ('A(?P<version>\d+)-+.+$'       , "ABC"                 ),           ('-G3.+$'                       , "G3Torrent"           ),           ('exbc.+$'                      , "BitComet"            ),           ('-LT(?P<version>\d+)-+.+$'     , "libtorrent"          ),           ('Mbrst(?P<version>\d-\d-\d).+$', "burst!"              ),           ('-BB(?P<version>\d+)-+.+$'     , "BitBuddy"            ),           ('-CT(?P<version>\d+)-+.+$'     , "CTorrent"            ),           ('-MT(?P<version>\d+)-+.+$'     , "MoonlightTorrent"    ),           ('-BX(?P<version>\d+)-+.+$'     , "BitTorrent X"        ),           ('-TN(?P<version>\d+)-+.+$'     , "TorrentDotNET"       ),           ('-SS(?P<version>\d+)-+.+$'     , "SwarmScope"          ),           ('-XT(?P<version>\d+)-+.+$'     , "XanTorrent"          ),           ('U(?P<version>\d+)-+.+$'       , "UPnP NAT Bit Torrent"),           )matches = [(re.compile(pattern, re.DOTALL), name) for pattern, name in matches]def identify_client(peerid):    client = 'unknown'    version = ''    for pat, name in matches:        m = pat.match(peerid)        if m:            client = name            d = m.groupdict()            if d.has_key('version'):                version = d['version']                version = version.replace('-','.')                if version.find('.') == -1:                    version = '.'.join(version)            break    return client, version