from ctypes import *

for nested, data in (
    (BigEndianStructure, b'\0\0\0\1\0\0\0\2'),
    (LittleEndianStructure, b'\1\0\0\0\2\0\0\0'),
):
    for parent in (
        BigEndianStructure,
        LittleEndianStructure,
        Structure,
    ):
        class NestedStructure(nested):
            _fields_ = [("x", c_uint32),
                        ("y", c_uint32)]

        class TestStructure(parent):
            _fields_ = [("point", NestedStructure)]

        ptr = POINTER(TestStructure)
        s = cast(data, ptr)[0]