mvc信息管理系统

"""
  步骤一：
       数据模型类：StudentModel
          数据：姓名 name,年龄 age,成绩 score,编号 id
       逻辑控制类：StudentManagerController
          数据：学生列表 _stu_list
          行为：获取列表stu_List
               添加学生 add_student
               修改学生 update_student(new_stu)
               根据成绩升序排列 order_by_score
  步骤二：
       界面视图类：StudentManagerView
          行为：
          显示菜单__display_menu,
          选择菜单项__select_menu_item,入口逻辑main,
          输入学生__input_students,
          显示学生信息__output_students
          删除学生信息__delete_student
          修改学生信息__modify_student
"""


class StudentModel:
    def __init__(self, name, age, score, id=0):
        self.name = name
        self.age = age
        self.score = score
        self.id = id


class StudentManagerController:
    init_id = 1000

    @classmethod
    def __generate__id(cls, stu):
        stu.id = cls.init_id
        cls.init_id += 1

    def __init__(self):
        self.__stu_list = []

    @property
    def stu_list(self):
        return self.__stu_list

    def add_student(self, stu):
        StudentManagerController.__generate__id(stu)
        self.__stu_list.append(stu)

    def remove_student(self, stu_id):
        """
          移除学生信息
        :param stu_id:
        :return:
        """
        for item in self.__stu_list:
            if item.id == stu_id:
                self.__stu_list.remove(item)
                return True
        return False

    def update_student(self, new_stu):
        for item in self.__stu_list:
            if item.id == new_stu.id:
                item.name = new_stu.name
                item.age = new_stu.age
                item.score = new_stu.score
                return True
        return False

    def order_by_score(self):
        for r in range(len(self.__stu_list) - 1):
            for c in range(r + 1, len(self.__stu_list)):
                if self.__stu_list[r] > self.__stu_list[c]:
                    self.__stu_list[r], self.__stu_list[c] = self.__stu_list[c], self.__stu_list[r]


class StudentManagerView:
    """
      学生管理视图：负责界面逻辑
    """

    def __init__(self):
        self.__controller = StudentManagerController()

    def __display_menu(self):
        print("1)添加学生信息")
        print("1)显示学生信息")
        print("1)删除学生信息")
        print("1)修改学生信息")
        print("1)根据成绩升序排列")

    def __select_menu(self):
        item = input("请输入选项：")
        if item == "1":
            self.__input_student()
        elif item == "2":
            self.__output_students()
        elif item == "3":
            self.__delete_students()
        elif item == "4":
            self.__modify_students()
        elif item == "5":
            self.__output_students_order_by_score()

    def main(self):
        while True:
            self.__display_menu()
            self.__select_menu()

    def __input_student(self):
        name = input("请输入学生姓名：")
        score = int(input("请输入学生成绩："))
        age = int(input("请输入学生年龄："))
        stu = StudentModel(name, age, score)
        self.__controller.add_student(stu)

    def __output_students(self):
        for item in self.__controller.stu_list:
            print('学生编号：%d，姓名是%s，年龄是%d，成绩是%d.' % (item.id, item.name, item.age, item.score))

    def __delete_students(self):
        stu_id = (input('请输入编号：'))
        if self.__controller.remove_student(stu_id):
            print('删除成功')
        else:
            print('删除失败')

    def __modify_students(self):
        stu = StudentModel()
        id = int(input('请输入需要修改的学生编号'))
        stu.name = int(input('请输入需要修改的学生姓名'))
        stu.age = int(input('请输入需要修改的学生年龄'))
        stu.score = int(input('请输入需要修改的学生成绩'))
        # stu = StudentModel(name, age, score, id)
        if self.__controller.update_student(stu):
            print('修改成功')
        else:
            print('修改失败')

    def __output_students_order_by_score(self):
        self.__controller.order_by_score()
        self.__output_students()


view = StudentManagerView()
view.main()
# # 测试
# controller = StudentManagerController()
# data01 = StudentModel('悟空', 23, 96)
# controller.add_student(data01)
# controller.remove_student(1006)
# controller.update_student(StudentModel('孙悟空', 24, 97, 1000))
# for i in controller.stu_list:
#     print(i.id, i.name)