Hex.py

class Hex(int):
    def __repr__(self) -> str:
        return hex(self)


_ops = ['__add__', '__sub__', '__mul__']


def _monkey_patch_op(operation):
    """
    wraps Hex() around int's  magic 
    method for provided operation
    """
    old_op = getattr(int, operation)
    new_op = lambda self, val : Hex(old_op(self, val))
    setattr(Hex, operation, new_op)


for _op in _ops:
    _monkey_patch_op(_op)