A continuación, un pequeño script para leer los archivos contenidos en un .torrent junto con su tamaño.
Para ello es necesario tener instalada la libtorrent:

$ sudo apt-get install python-libtorrent

Archivo infoTorrent.py

#!/usr/bin/python
import sys, libtorrent
 
def main():
        info = libtorrent.torrent_info(sys.argv[1])
        for f in info.files():
                print "%s - %s" % (f.path, f.size)
 
if __name__ == '__main__':
        main()
$ infoTorrent TBBTS06E03.torrent
 
The.Big.Bang.Theory.S06E03.720p.HDTV.X264/bb.theory.603.720p-dimension.r00 - 50000000
The.Big.Bang.Theory.S06E03.720p.HDTV.X264/bb.theory.603.720p-dimension.r01 - 50000000
The.Big.Bang.Theory.S06E03.720p.HDTV.X264/bb.theory.603.720p-dimension.r02 - 50000000
The.Big.Bang.Theory.S06E03.720p.HDTV.X264/bb.theory.603.720p-dimension.r03 - 50000000
The.Big.Bang.Theory.S06E03.720p.HDTV.X264/bb.theory.603.720p-dimension.r04 - 50000000
The.Big.Bang.Theory.S06E03.720p.HDTV.X264/bb.theory.603.720p-dimension.r05 - 50000000
The.Big.Bang.Theory.S06E03.720p.HDTV.X264/bb.theory.603.720p-dimension.r06 - 50000000
The.Big.Bang.Theory.S06E03.720p.HDTV.X264/bb.theory.603.720p-dimension.r07 - 50000000
The.Big.Bang.Theory.S06E03.720p.HDTV.X264/bb.theory.603.720p-dimension.r08 - 50000000
The.Big.Bang.Theory.S06E03.720p.HDTV.X264/bb.theory.603.720p-dimension.r09 - 16724584
The.Big.Bang.Theory.S06E03.720p.HDTV.X264/bb.theory.603.720p-dimension.rar - 50000000
The.Big.Bang.Theory.S06E03.720p.HDTV.X264/bb.theory.603.720p-dimension.sfv - 473
The.Big.Bang.Theory.S06E03.720p.HDTV.X264/bb.theory.603.720p-dimension.sample.mkv - 24516270
The.Big.Bang.Theory.S06E03.720p.HDTV.X264/the.big.bang.theory.603.720p-dimension.nfo - 273
The.Big.Bang.Theory.S06E03.720p.HDTV.X264/read.me - 47
The.Big.Bang.Theory.S06E03.720p.HDTV.X26/readme.txt - 47