import gzipimport StringIOdef gzip_compress(buf):    out = StringIO.StringIO()    with gzip.GzipFile(fileobj=out, mode="w") as f:        f.write(buf)    return out.getvalue()def gzip_decompress(buf):    obj = StringIO.StringIO(buf)    with gzip.GzipFile(fileobj=obj) as f:        result = f.read()    return result