python数据结构中代码的实现

这例题的代码要怎么实现呢，
没有找到具体的讲解，
😔😔

from abc import ABCMeta, abstractmethod, abstractproperty

class IList(metaclass = ABCMeta ):
    @abstractmethod
    def clear(self):
        pass
    @abstractmethod
    def isEmpty(self):
        pass
    @abstractmethod
    def length(self):
        pass
    @abstractmethod
    def get(self,i):
        pass
    @abstractmethod
    def insert(self):
        pass
    @abstractmethod
    def remove(self,x):
        pass
    @abstractmethod
    def indexof(self,x):
        pass
    @abstractmethod
    def display(self):
        pass
A = [1,2,3,4,5,6,7]
B = A.length()
print(B)

• 你可以参考下这个问题的回答, 看看是否对你有帮助, 链接: https://ask.csdn.net/questions/7702458