Python基础day-19[面向对象:18天附]

Posted 2020-09-26

类组合的是示例:

class People:
    def __init__(self,name,age,sex):
        self.name = name
        self.age = age
        self.sex = sex

class Teacher(People):
    def __init__(self,name,age,sex,job,company):
        People.__init__(self,name,age,sex)
        self.job = job
        self.company = company
        self.course = []     #定义老师类的课程属性初始为一个 空的列表
    def dis_info(self):
        print(‘‘‘==================%s info===================
        Name:%s
        Age:%s
        Sex:%s
        Job:%s
        Company:%s
        ‘‘‘%(self.name,self.name,self.age,self.sex,self.job,self.company))
    def dis_course_info(self):     #定义打印老师类的课程信息
        if ‘course‘ in self.__dict__:   #判断 对象属性中是否有  course属性 
            for i in self.course:     #如果有就打印出来
                i.dis_course()

class Student(People):
    def __init__(self,name,age,sex,classroom,school):
        People.__init__(self,name,age,sex)
        self.classroom = classroom
        self.school = school
        self.course = []
    def dis_info(self):
        print(‘‘‘==================%s info===================
        Name:%s
        Age:%s
        Sex:%s
        Classroom:%s
        School:%s
        ‘‘‘%(self.name,self.name,self.age,self.sex,self.classroom,self.school))
    def dis_course_info(self):
        if ‘course‘ in self.__dict__:
            for i in self.course:
                i.dis_course()

class Course:   #定义的课程类
    def __init__(self,course,price,period):
        self.course = course
        self.price = price
        self.period  = period
    def dis_course(self):   #打印课程信息
        print(‘‘‘
        Course Name:%s
        Course Price:%s
        Course Period:%s
        ‘‘‘%(self.course,self.price,self.period))

egon = Teacher(‘egon‘,18,‘male‘,‘teach‘,‘Oldboy‘)
ldsly = Student(‘ldsly‘,23,‘male‘,‘PythonS5‘,‘Oldboy‘)

python = Course(‘python‘,15800,‘6month‘)   #使用  课程类实例化 课程
linux = Course(‘linux‘,12000,‘5month‘)

egon.course.append(python)   #给老师类实例化的对象 添加 课程
egon.course.append(linux)

ldsly.course.append(python)

egon.dis_course_info()
ldsly.dis_course_info()
egon.dis_info()
ldsly.dis_info()

执行结果:
D:\Python\Python36-32\python.exe E:/Python/DAY-19/默写内容.py

        Course Name:python
        Course Price:15800
        Course Period:6month
        

        Course Name:linux
        Course Price:12000
        Course Period:5month
        

        Course Name:python
        Course Price:15800
        Course Period:6month
        
==================egon info===================
        Name:egon
        Age:18
        Sex:male
        Job:teach
        Company:Oldboy
        
==================ldsly info===================
        Name:ldsly
        Age:23
        Sex:male
        Classroom:PythonS5
        School:Oldboy
        

Process finished with exit code 0

生成的对象的序列化反序列化:

import pickle
#
class Student:
    def __init__(self,name,age,sex):    #对象反序列化之后 需要在内存中寻找自己所属的类,如果没有会报错
        self.name = name
        self.age = age
        self.sex = sex


ldsly = Student(‘ldsly‘,23,‘male‘)

with open(‘student.pkl‘,‘wb‘) as f:   #序列化对象 ldsly
    res = pickle.dumps(ldsly)
    f.write(res)

with open(‘student.pkl‘,‘rb‘) as f:   #反序列化
    res = f.read()
    ldsly = pickle.loads(res)     #还原 对象ldsly
    print(ldsly.name,ldsly.age,ldsly.sex)

执行结果:
D:\Python\Python36-32\python.exe E:/Python/DAY-19/序列化.py
ldsly 23 male

Process finished with exit code 0