import sys
from ctypes import Structure, Union

# At runtime, the native endianness is an alias for Structure,
# while the other is a subclass with a metaclass added in.
class BigEndianStructure(Structure):
    __slots__ = ()

class LittleEndianStructure(Structure): ...

# Same thing for these: one is an alias of Union at runtime
if sys.version_info >= (3, 11):
    class BigEndianUnion(Union):
        __slots__ = ()

    class LittleEndianUnion(Union): ...