import hashlib  
hash_new = hashlib.sha1() #或hashlib.md5()  
with open('driver.xml.tar.bz2','rb') as fp: #打开文件，一定要以二进制打开  
    while True:  
        data = fp.read() #读取文件块  
        if not data: #直到读完文件  
            break  
        hash_new.update(data)  
hash_value = hash_new.hexdigest() #生成40位(sha1)或32位(md5)的十六进制字符串  
print hash_value 
#//python/7141