def _get_maximum_depth(self):
        """
        Under Django versions < 1.6, to avoid triggering
        https://code.djangoproject.com/ticket/16572 we can only look
        as far as children.
        """
        levels = None
        if (1, 6, 0) < django.VERSION:
            levels = 1
        return levels
dataset/ETHPy150Open carljm/django-model-utils/model_utils/managers.py/InheritanceQuerySetMixin._get_maximum_depth/swapped operands of `<`