emmm......就当练习了系列20

1、练习上课作业讲解的面向对象代码，明天默写

class School:
    school_name = 'OLDBOY'

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

    def related_class(self, class_obj):
        # self.classes.append(班级名字)
        # self.classes.append(class_name)
        self.classes.append(class_obj)

    def tell_class(self): # 改
        # 打印的班级的名字
        print(self.nickname.center(60,'='))
        # 打印班级开设的课程信息
        for class_obj in self.classes:
            class_obj.tell_course()
class Class:
    def __init__(self, name):
        self.name = name
        self.course = None
        self.student = []

    def related_course(self, course_obj):
        # self.course = course_name
        self.course = course_obj

    def related_student(self,student_obj):
        self.student.append(student_obj)

    def tell_course(self):
        print('%s' % self.name,end=" ")
        self.course.tell_info() # 打印课程的详细信息
class Course:
    def __init__(self,name,period,price):
        self.name=name
        self.period=period
        self.price=price

    def tell_info(self):
        print('<课程名:%s 周期:%s 价钱:%s>' %(self.name,self.period,self.price))

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

class School:
    school_name = 'OLDBOY'
    addr = ''
    classes = []
    def related_school(self,nickname, addr):
        self.school_name = nickname
        self.addr = addr

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

    def tell_class(self): # 改
        print(self.school_name.center(60,'='))
        for class_obj in self.classes:
            print(class_obj.name)


class Class(School):
    def __init__(self, name):
        self.name = name
        self.classes.append(self)
        self.course = []
        self.student = []

    def related_course(self, course_obj):
        # self.course = course_name
        self.course.append(course_obj)

    def related_student(self,student_obj):
        self.student.append(student_obj)

    def tell_course(self):
        print('%s课程' % self.name)
        for course_obj in self.course:
            course_obj.tell_info() # 打印课程的详细信息

    def tell_student(self):
        print('%s学生' % self.name)
        for student_obj in self.student:
            student_obj.tell_info()

class Course:
    def __init__(self,name,time):
        self.name=name
        self.time=time

    def tell_info(self):
        print('<课程名:%s 课时:%s>' %(self.name,self.time))

class Student:
    def __init__(self, name, sno):
        self.name = name
        self.sno = sno

    def tell_info(self):
        print('<学生名:%s 学号:%s >' % (self.name, self.sno,))


class pickle_obj:

    def __init__(self, obj):
        import os
        self.obj = obj
        self.path = os.path.join(os.path.dirname(__file__), obj.name,'.pkl')

    def dumps(self):
        import pickle
        with open(self.path,'w',encoding='utf-8')as f:
            res = pickle.dump(self.obj, f)
        print(res)

    def loads(self):
        import pickle
        with open(self.path, 'r', encoding='utf-8')as f:
            res = pickle.load(f)
        print(res)

class_obj1 = Class("py14")
class_obj2 = Class("py15")
class_obj3 = Class("py16")

class_obj1.related_school("oldboy","上海")
class_obj1.tell_class()

course_obj1 = Course("爬虫","30h")
course_obj2 = Course("SQL","16h")
course_obj3 = Course("数据分析","30h")

class_obj1.related_course(course_obj1)
class_obj1.related_course(course_obj2)

class_obj2.related_course(course_obj2)
class_obj2.related_course(course_obj3)

class_obj3.related_course(course_obj1)
class_obj3.related_course(course_obj3)

class_obj1.tell_course()
class_obj2.tell_course()
class_obj3.tell_course()

class_obj1.related_student(Student("小一",'001'))
class_obj1.related_student(Student("小一1",'011'))
class_obj2.related_student(Student("小二",'002'))
class_obj2.related_student(Student("小二2",'022'))
class_obj3.related_student(Student("小三",'003'))
class_obj3.related_student(Student("小三3",'033'))

class_obj1.tell_student()
class_obj2.tell_student()
class_obj3.tell_student()

pickle_obj(class_obj1).dumps()
pickle_obj(class_obj1).loads()