python学习28——课后练习

# 1、练习上课作业讲解的面向对象代码，明天默写
# 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,name,addr):
        self.uid=uuid.uuid4()
        self.nickname=name
        self.addr = addr
        self.classes = []

    def related_class(self,class_obj):
        self.classes.append(class_obj.uid)

    def getinfo_class(self):
        print(self.nickname.center(60,'-'))
        for class_uid in self.classes:
            with open(f'{class_uid}.pkl','rb')as f:
                class_obj = pickle.load(f)
                class_obj.getinfo_course()

    def save(self):
        with open(f'{self.uid}.pkl','wb')as f:
            pickle.dump(self,f)


class Class:
    def __init__(self,name):
        self.uid = uuid.uuid4()
        self.name = name
        self.course = None

    def related_course(self,course_obj):
        self.course = course_obj.uid

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

    def save(self):
        with open(f'{self.uid}.pkl','wb')as f:
            pickle.dump(self,f)




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

    def getinfo_course(self):
        print(f'<课程名:{self.name} 周期:{self.period} 价钱:{self.price}>')

    def save(self):
        with open(f'{self.uid}.pkl','wb')as f:
            pickle.dump(self,f)


class Student:
    #      学生的学校
    #      学生的姓名
    #      学生的年龄
    #      学号
    #      学生的性别
    def __init__(self,school,name,age,number,gender):
        self.uid = uuid.uuid4()
        self.school = school
        self.name = name
        self.age = age
        self.number = number
        self.gender = gender

    def getinfo_student(self):
        print(f'<学生信息: 校区：{self.school}，名字：{self.name}，年龄：{self.age}，学号：{self.number}，性别：{self.gender}>')

    def choose(self,course_obj):
        self.course = course_obj.uid

    def save(self):
        with open(f'{self.uid}.pkl','wb')as f:
            pickle.dump(self,f)

school_obj1 = School('上海校区','虹桥')
school_obj2 = School('北京校区','北京某地')
class_obj1 = Class('脱产14期')
class_obj2 = Class('脱产29期')
course_obj1 = Course('python全栈','6mons','20000')
course_obj2 = Course('linux运维','5mons','18000')
student_obj1 = Student('上海校区','西楼','24','007','男')
student_obj2 = Student('北京校区','黑人','18','666','男')

school_obj1.related_class(class_obj1)
class_obj1.related_course(course_obj1)
school_obj1.save()
# school_obj2.save()
class_obj1.save()
# class_obj2.save()
course_obj1.save()
# course_obj2.save()
# student_obj1.save()
# student_obj2.save()
school_obj1.getinfo_class()