def from_bytes(self, raw):
        '''Return a Null header object reconstructed from raw bytes, or an
        Exception if we can't resurrect the packet.'''
        if len(raw) < 4:
            raise NotEnoughDataError("Not enough bytes ({}) to reconstruct a Null object".format(len(raw)))
        fields = struct.unpack('=I', raw[:4])
        self._af = fields[0]
        return raw[4:]
def from_bytes ( self , raw ) : if len ( raw ) < 4 : raise NotEnoughDataError ( "Not enough bytes ({}) to reconstruct a Null object" . format ( len ( raw ) ) ) fields = struct . unpack ( '=I' , raw [ : 4 ] ) self . _af = fields [ 0 ] return raw [ 4 : ]
Return a Null header object reconstructed from raw bytes, or an
        Exception if we can't resurrect the packet.