我想将bz2 url中的数据直接解压缩到目标文件.这是代码：

filename = 'temp.file'  
req = urllib2.urlopen('http://example.com/file.bz2')
CHUNK = 16 * 1024
with open(filename, 'wb') as fp:
  while True:
    chunk = req.read(CHUNK)
    if not chunk: break
    fp.write(bz2.decompress(chunk)) 
fp.close()

bz2.decompress(chunk)出错 – ValueError：找不到流的结尾

解决方法:

使用bz2.BZ2Decompressor进行顺序解压缩：

filename = 'temp.file'  
req = urllib2.urlopen('http://example.com/file.bz2')
CHUNK = 16 * 1024

decompressor = bz2.BZ2Decompressor()
with open(filename, 'wb') as fp:
    while True:
        chunk = req.read(CHUNK)
        if not chunk:
            break
        fp.write(decompressor.decompress(chunk))
req.close()

顺便说一下,只要你使用with语句就不需要调用fp.close().