day17-2 继承

继承：作用是为了减少代码

class People:

    def __init__(self,name,age):
        self.name = name
        self,age = age

    def eat(self):
        print("%s is eating" % self.name)

    def talk(self):
        print("%s is talking" % self.name)

    def sleeping(self):
        print("%s is sleeping" % self.name)

class Man(People):  # 继承父类

    def fly(self):
        print('%s男人' % self.name)

    # def sleeping(self):
    #     print("the man is sleeping")  # 这个会直接覆盖掉父类的方法

    def sleeping(self):
        People.sleeping(self)   # 先执行父类的方法
        print("%s 已经熟睡" % self.name)

m1 = Man('rich','11')
m1.eat()
m1.fly()
m1.sleeping()

class Woman(People):

    def get_birth(self):
        print("%s is make a children.... " % self.name)

w1 = Woman('yang','22')
w1.get_birth()

# 
# rich is eating
# rich男人
# rich is sleeping
# rich 已经熟睡
# yang is make children.... 

 多继承

class People(object):  # 新式类
# class People: #经典类

    def __init__(self,name,age):
        self.name = name
        self,age = age

    def eat(self):
        print("%s is eating" % self.name)

    def talk(self):
        print("%s is talking" % self.name)

    def sleeping(self):
        print("%s is sleeping" % self.name)

class Relation(object):

    def make_friends(self,obj):
        print("%s is making friends with %s" %(self.name,obj.name))


class Man(Relation,People):  # 继承父类
     # 重构父类
     # 给Man传入新的属性
    def __init__(self,name,age,job):
        # People.__init__(self,name,age)
        super(Man,self).__init__(name,age)  # 与上面一行代码作用一样，但是如果继承的类做了更改，这种方法不需要修改，同时如果多继承，上面那段代码需要在每一个继承类的地方添加
        self.job = job
    def fly(self):
        print('%s男人' % self.name)

    # def sleeping(self):
    #     print("the man is sleeping")  # 这个会直接覆盖掉父类的方法

    def sleeping(self):
        People.sleeping(self)   # 先执行父类的方法
        print("%s 已经熟睡" % self.name)

m1 = Man('rich','11','IT')
print(m1.job)
m1.eat()
m1.fly()
m1.sleeping()

class Woman(People):

    def get_birth(self):
        print("%s is make a children.... " % self.name)

w1 = Woman('yang','22')
w1.get_birth()
m1.make_friends(w1)   # 多继承   为什么要进行多继承，
#
# IT
# rich is eating
# rich男人
# rich is sleeping
# rich 已经熟睡
# yang is make a children.... 
# rich is making friends with yang

新式类和经典类：

新式类和经典类的区别主要体现在多继承的继承问题：

在python 2 上经典类是按深度优先来继承的，新式类是按广度优先继承的

python 3 上经典类和新式类都是按广度优先类继承的

继承实例详解

#描述一个学校，老师，学生的关系

class School_own(object):

    def __init__(self,name,addr):
        self.name = name
        self.addr = addr
        self.students = []
        self.teachers = []

    def enroll(self,stu_obj):
        self.students.append(stu_obj)
        print("%s 为学生办理注册手续" % stu_obj.name)

    def hire(self,staff_obj):
        self.teachers.append(staff_obj)


class SchoolMember(object):

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

class Teacher(SchoolMember):
    def __init__(self,name,age,sex,salary,course):
        super(Teacher,self).__init__(name,age,sex)
        self.salary = salary
        self.course = course

    def tell(self):
        print('''
        -------------info of Teacher %s-------
        Name:%s
        Age:%s
        sex:%s
        Salary:%s
        Course:%s
        ''' %(self.name,self.name,self.age,self.sex,self.salary,self.course))

    def teach(self):
        print("%s is teacheing course [%s]" %(self.name,self.course))


class Stduent(SchoolMember):
    def __init__(self,name,age,sex,stu_id,grade):
        super(Stduent,self).__init__(name,age,sex)
        self.stu_id = stu_id
        self.grade = grade

    def tell(self):
        print('''
        -------------info of Student %s-------
        Name:%s
        Age:%s
        sex:%s
        Stu_id:%s
        Grade:%s
        ''' %(self.name,self.name,self.age,self.sex,self.stu_id,self.grade))

    def pay_tuition(self,amount):
        print("%s has paid tuition $%s" %(self.name,amount))

school = School_own("qhgdx",'yibin')

t1 = Teacher("02",'22','m','100000','shua')
t2 = Teacher("houyali",'99','w','10','cui')

s1 = Stduent("yang",66,"M",1510,"python")
s2 = Stduent("rich",66,"M",1510,"python")


t1.tell()
s1.tell()
school.enroll(s1)
school.enroll(s2)
school.hire(t1)
print(school.students[0].name)
print(school.teachers[0].name)
school.teachers[0].teach()

for stu in school.students:
    stu.pay_tuition(5000)

#     -------------info
#     of
#     Teacher
#     02 - ------
#     Name: 02
#     Age: 22
#     sex: m
#     Salary: 100000
#     Course: shua
#
#     -------------info
#     of
#     Student
#     yang - ------
#     Name: yang
#     Age: 66
#     sex: M
#     Stu_id: 1510
#     Grade: python
#
# yang
# 为学生办理注册手续
# rich
# 为学生办理注册手续
# yang
# 02
# 02 is teacheing
# course[shua]
# yang
# has
# paid
# tuition $5000
# rich
# has
# paid
# tuition $5000