在python3.6中,如何将“io.bytes io”转换为类似于对象的字节?

如果使用gzip、compress或deflate压缩主体或HTTP响应,则使用此函数来解压缩该主体或HTTP响应。

def uncompress_body(self, compression_type, body):
    if compression_type == 'gzip' or compression_type == 'compress':
        return zlib.decompress(body)
    elif compression_type == 'deflate':
        compressor = zlib.compressobj(9, zlib.DEFLATED, -zlib.MAX_WBITS)
        compressed = compressor.compress(body)
        compressed += compressor.flush()
        return base64.b64encode(compressed)

    return body

但是,python会抛出此错误消息。

TypeError: a bytes-like object is required, not '_io.BytesIO'

在这一行上:

return zlib.decompress(body)

从本质上讲,我如何从“字节集”转换为类似对象的字节?

谢谢