Python __len__


**len**()을 구현하여 길이가 있는 무언가 를 표현
흔히 listy하다고 표현









> [Interview_Question_for_Beginner/Python at master · JaeYeopHan/Interview_Question_for_Beginner](https://github.com/JaeYeopHan/Interview_Question_for_Beginner/tree/master/Python#celery)





