structtuple.py

from collections import namedtuple
from struct import Struct


class StructTuple:

    def _pack(self):

        return self._struct.pack(*self)

    @classmethod
    def _unpack(cls, data):

        return cls._make(cls._struct.unpack(data))

    @classmethod
    def _unpack_start(cls, data):

        parsed = cls._unpack(data[:cls._struct.size])
        remainder = data[cls._struct.size:]
        return parsed, remainder


def structtuple(typename, field_names, struct_format):

    cls = namedtuple(typename, field_names)
    cls._struct = Struct(struct_format)
    cls.__bases__ += (StructTuple,)
    return cls