[LeetCode]TypeError: xxx takes 2 positional arguments but 4 were

参考:https://stackoverflow.com/questions/57258281/typeerror-init-takes-2-positional-arguments-but-4-were-given

​​MyBook(title,author,price)​​​ will pass four arguments: ​​(self, title, author, price)​​

会多了一个self的参数