tOSM some Ideas

properties.py

class _BaseProperty(object):
    def __set__(self, instance, value):
        self._implicid_validation(value)
        self.__validate(value)

        # this way you dont look every time for attr_name
        if not hasattr(self, 'attr_name'):
            for attr_name, attr_value in instance.__class__.__dict__.items():
                if attr_value == self:
                    self.attr_name = '_attributename_'+attr_name
                    break

        setattr(instance, self.attr_name, value)