ZipFile抱怨，有没有办法使用zipfile模块？

I am trying to decompress some MMS messages sent to me zipped. The problem is that sometimes it works, and others not. And when it doesnt work, the python zipfile module complains and says that it is a bad zip file. But the zipfile decompresses fine using the unix unzip command.I am trying to decompress some MMS messages sen