def __get__(self, instance, owner):
		if instance is None:
			raise AttributeError # ?
		
		if instance.__dict__ not in self.field.name:
			json_string = getattr(instance, self.field.attname)
			instance.__dict__[self.field.name] = json.loads(json_string)
		
		return instance.__dict__[self.field.name]
dataset/ETHPy150Open ithinksw/philo/philo/models/fields/__init__.py/JSONDescriptor.__get__/swapped operands of `not in`