Python脚本解析BitTorrent种子文件内容

有很多种子文件，有时候记不清里面都是什么东西，又不想一个一个的拖放到迅雷或BT软件里头看，
上网查了一下Python的脚本，自己也稍微修改了一下，代码如下，粘贴到文本编辑器中（最好是带格式的如UltraEdit或VS2008等）：
保存成py后缀的，直接运行
import re
def tokenize(text, match=re.compile("([idel])|(\d+):|(-?\d+)").match):
i = 0
while i < len(text):
m = match(text, i)
s = m.group(m.lastindex)
i = m.end()
if m.lastindex == 2:
yield "s"
yield text[i:i+int(s)]
i = i + int(s)
else:
yield s
def decode_item(next, token):
if token == "i":
# integer: "i" value "e"
data = int(next())
if next() != "e":
raise ValueError
elif token == "s":
# string: "s" value (virtual tokens)
data = next()
elif token == "l" or token == "d":
# container: "l" (or "d") values "e"
data = []
tok = next()
while tok != "e":
data.append(decode_item(next, tok))
tok = next()
if token == "d":
data = dict(zip(data[0::2], data[1::2]))
else:
raise ValueError
return data
def decode(text):
try:
src = tokenize(text)
data = decode_item(src.next, src.next())
for token in src: # look for more tokens
raise SyntaxError("trailing junk")
except (AttributeError, ValueError, StopIteration):
raise SyntaxError("syntax error")
return data
if __name__ == "__main__":
#需要读取的文件名称放到这里
data = open("Riko.Tachibana.torrent", "rb").read()
torrent = decode(data)
myfile = file("testit.txt", 'w')
a = u'文件名称'.encode('gbk')
b = u'文件大小'.encode('gbk')
print "%s \t %s \n" % (a,b)
for file in torrent["info"]["files"]:
print "%s \t %d Mb " % ("/".join(file["path"]), file["length"]/1024/1024)
print "------------------------------