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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _read_body(stream, decoder, strict=False, logger=None):
 """ Read an AMF message body from the stream. @type stream: L{BufferedByteStream<pyamf.util.BufferedByteStream>} @param decoder: An AMF0 decoder. @param strict: Use strict decoding policy. Default is `False`. @param logger: Used to log interesting events whilst reading a remoting body. @type logger: A C{logging.Logger} instance or C{None}. @return: A C{tuple} containing the C{id} of the request and the L{Request} or L{Response} """

    def _read_args():
        # we have to go through this insanity because it seems that amf0
        # does not keep the array of args in the object references lookup
        type_byte = stream.peek(1)

        if type_byte == '\x11':
            if not decoder.use_amf3:
                raise pyamf.DecodeError(
                    "Unexpected AMF3 type with incorrect message type")

            return decoder.readElement()

        if type_byte != '\x0a':
            raise pyamf.DecodeError("Array type required for request body")

        stream.read(1)
        x = stream.read_ulong()

        return [decoder.readElement() for i in xrange(x)]

    target = stream.read_utf8_string(stream.read_ushort())
    response = stream.read_utf8_string(stream.read_ushort())

    status = STATUS_OK
    is_request = True

    for code, s in STATUS_CODES.iteritems():
        if not target.endswith(s):
            continue

        is_request = False
        status = code
        target = target[:0 - len(s)]

    if logger:
        logger.debug('Remoting target: %r' % (target,))

    data_len = stream.read_ulong()
    pos = stream.tell()

    if is_request:
        data = _read_args()
    else:
        data = decoder.readElement()

    if strict and pos + data_len != stream.tell():
        raise pyamf.DecodeError("Data read from stream does not match body "
            "length (%d != %d)" % (pos + data_len, stream.tell(),))

    if is_request:
        return response, Request(target, body=data)

    if status == STATUS_ERROR and isinstance(data, pyamf.ASObject):
        data = get_fault(data)

    return target, Response(data, status)