如何使用项目列表(继承自抽象类)作为其抽象类？

from abc import ABC, abstractmethod

# 定义一个抽象类
class AbstractProjectList(ABC):
    def __init__(self):
        self.projects = []

    @abstractmethod
    def add_project(self, project):
        """添加项目到列表"""
        pass

    @abstractmethod
    def remove_project(self, project):
        """从列表中移除项目"""
        pass

    def list_projects(self):
        """列出所有项目"""
        return self.projects

# 继承抽象类并实现抽象方法
class ConcreteProjectList(AbstractProjectList):
    def add_project(self, project):
        if project not in self.projects:
            self.projects.append(project)

    def remove_project(self, project):
        if project in self.projects:
            self.projects.remove(project)

# 使用示例
project_list = ConcreteProjectList()
project_list.add_project("Project A")
project_list.add_project("Project B")
print(project_list.list_projects())  # 输出: ['Project A', 'Project B']
project_list.remove_project("Project A")
print(project_list.list_projects())  # 输出: ['Project B']