def __gt__(self, value):
        return QNode(**{'{}__gt'.format(self.get_path()): value})
return prefix of `filename`, that is the part without the
dataset/ETHPy150Open Nepherhotep/django-orm-sugar/django_orm_sugar.py/QFactory.__gt__--crossover with--dataset/ETHPy150Open CGATOxford/cgat/CGAT/IOTools.py/snip