Day29.继承实现

１.继承实现＿示范１创建学生类和老师类，双类中存在冗余代码

# 示范1：类与类之前存在冗余问题
class Student:
    school = 'OLDBOY'
    
    def __init__(self, name, age, sex):
        self.name = name
        self.age = age
        self.sex = sex
    
    def chooser_course(self):
        print('%s 正向选课' % self.name)

class Teacher:
    school = 'OLDBOY'
    
    def __init__(self, name, age, sex, salary, level):
        self.name = name
        self.age = age
        self.sex = sex
        self.salary = salary
        self.sex = sex

    def score(self):
        print('老师 %s 正在给学生打分' % self.name)

２.继承实现＿示范２学生类继承共有数据类

# 示范2：基于继承解决类与类之间的冗余问题
class OldboyPeople:
    school = 'OLDBOY'
    #           空对象,'egon', 18, 'male', 3000, 10
    def __init__(self, name,  age,  sex):
        self.name = name
        self.age = age
        self.sex = sex


# 然后继承共同部分的`class 类名(OldboyPeople)`
class Student(OldboyPeople):
    def chooser_course(self):
        print('学生%s 正向选课' % self.name)

stu_obj = Student('lili', 18, 'femal')
print('Student类，基于继承解决类与类之间的冗余问题'.center(40, '-'))
print(stu_obj.__dict__)
print(stu_obj.school)
stu_obj.chooser_course()

３.继承实现＿示范２老师类继承共有数据类，非共有数据在老师类中的＿＿ｉｎｉｔ＿＿下新增定义

# 示范2：基于继承解决类与类之间的冗余问题
class OldboyPeople:
    school = 'OLDBOY'
    #           空对象,'egon', 18, 'male', 3000, 10
    def __init__(self, name,  age,  sex):
        self.name = name
        self.age = age
        self.sex = sex


# 然后继承共同部分的`class 类名(OldboyPeople)`
class Teacher(OldboyPeople):
    def __init__(self, name, age, sex, salary, level):
        # 有三个参数和父类OldboyPeople相同，相同的部分可以指名道姓的和父类OldboyPeople去要__init__
        # 不同部分在Teacher类下的__init__中重新定义
        OldboyPeople.__init__(self, name, age, sex)   # 等同于在Teacher类中__init__写 
                                                      #                 self.name = name 
                                                      #                 self.age = age 
                                                      #                 self.sex = sex
        self.salary = salary
        self.level = level

    def score(self):
        print('老师 %s 正在给学生打分' % self.name)

tea_obj = Teacher('egon', 18, 'male', 3000, 10)
print('Teacher类，相同参数部分继承父类，不同参数部分在Teacher类下添加'.center(60, '-'))
print(tea_obj.__dict__)
tea_obj.score()