4.8作业

2、基于上课作业讲解的面向对象代码，扩写Student类
3、加入序列化与反序列化操作
4、对象之间的关联采用id号
5、可以通过id找到对应的文件，然后从文件中反序列化出执行的学校、班级、课程、学生对象

import pickle
import uuid


class School:

    school_name = 'OLDBOY'

    def __init__(self, nickname, addr):
        self.nickname = nickname
        self.addr = addr
        self.uuid = uuid.uuid4()
        self.classes = []
        self.save_info()


    def relate_class(self, class_obj):
        self.classes.append(class_obj.uuid)
        self.save_info()


    def save_info(self):
        with open(f'db\school_file\{self.uuid}.pkl', 'wb') as f:
            pickle.dump(self, f)


    def get_class(self):
        print(self.nickname.center(60, '='))
        # 打印班级开班的课程信息
        for class_uuid in self.classes:
            with open(f'db\class_file\{class_uuid}.pkl', 'rb') as f:
               class_obj = pickle.load(f)
               class_obj.get_course()
               class_obj.get_student()


class Class:
    def __init__(self, name):
        self.name = name
        self.course = None
        self.students = []
        self.uuid = uuid.uuid4()
        self.save_info()

    def relate_course(self, course_obj):
        self.course = course_obj.uuid
        self.save_info()

    def save_info(self):
        with open(f'db\class_file\{self.uuid}.pkl', 'wb') as f:
            pickle.dump(self, f)

    def get_course(self):
        print('%s' % self.name, end=" ")
        with open(f'db\course_file\{self.course}.pkl', 'rb') as f:
            course_obj = pickle.load(f)
            course_obj.course_info()


    def get_student(self):
        print('%s' % self.name, end=" ")
        for student_uuid in self.students:
            with open(f'db\student_file\{student_uuid}.pkl', 'rb') as f:
                student_obj = pickle.load(f)
                student_obj.student_info()


class Course:
    def __init__(self, name, period, price):
        self.name = name
        self.period = period
        self.price = price
        self.uuid = uuid.uuid4()
        self.save_info()

    def course_info(self):
        print('<课程名:%s 时长:%s 价格:%s>' % (self.name, self.period, self.price))

    def save_info(self):
        with open(f'db\course_file\{self.uuid}.pkl', 'wb') as f:
            pickle.dump(self, f)



class Student:
    def __init__(self, name, age, sex):
        self.name = name
        self.age = age
        self.sex = sex
        self.uuid = uuid.uuid4()
        self.my_class = None
        self.my_course = None
        self.save_info()

    def student_info(self):
        print('<学生名字:%s 年龄:%s 性别:%s>' % (self.name, self.age, self.sex))

    def relate_class(self, class_obj):
        self.my_class = class_obj.uuid
        self.my_course = class_obj.uuid
        class_obj.students.append(self.uuid)
        self.save_info()
        class_obj.save_info()

    def save_info(self):
        with open(f'db\student_file\{self.uuid}.pkl', 'wb') as f:
            pickle.dump(self, f)

　　

# 创建校区
school_obj1 = School('老男孩魔都校区', '上海')
school_obj2 = School('老男孩帝都校区', '北京')

# # 创建班级
class_obj1 = Class('脱产14期')
class_obj2 = Class('脱产15期')
class_obj3 = Class('脱产29期')

# 上海校区开了:脱产14期，上海校区开了脱产15期
school_obj1.relate_class(class_obj1)
school_obj1.relate_class(class_obj2)
# 北京校区开了:脱产29期
school_obj2.relate_class(class_obj3)

# 1、创建课程
course_obj1 = Course('python全栈开发', '6mons', 20000)
course_obj2 = Course('linux运维', '5mons', 18000)
# 3、为班级关联课程对象
class_obj1.relate_course(course_obj1)
class_obj2.relate_course(course_obj2)
class_obj3.relate_course(course_obj1)

stu_obj1 = Student('jack', 18, 'male')
stu_obj2 = Student('egon', 18, 'female')
stu_obj3 = Student('alex', 18, 'female')

stu_obj1.relate_class(class_obj1)
stu_obj2.relate_class(class_obj2)
stu_obj3.relate_class(class_obj3)

school_obj1.get_class()
school_obj2.get_class()