Python学习-类的继承

继承：
#python2 经典类是按深度优先来继承的，新式类是按广度优先来继承的
#python3 经典类和新式类都是按广度优先来继承的



#经典类：class People:
class People(object):  #这个是新式类,多继承的时候有了改变

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

#多继承的示范
class Relation(object):
    def make_friends(self, obj):
        print("%s is making friends with %s" % (self.name, obj.name))
        self.friends.append(obj)  #要用obj，这样才和另一个实例产生联系

#子类继承
class Man(People, Relation):  #小括号中 一定要有父类名称，如People

    def __init__(self, name, age, sex="man"):
#        People().__init__(self,name, age) 第一种的初始化方法
        super().__init__(name, age)  # superclass，super函数直接继承所有，super(Man, self)的省略
        self.sex = sex
        self.friends = []

    def working_hard(self):
        print("earning money.")

    def sleep(self):   #重构了父类的方法
        People.sleep(self)
        print("Man %s is sleeping" % self.name)


class Woman(People, Relation):

    def __init__(self,name, age, sex = "woman"):
        super().__init__(name, age)
        self.sex = sex
        self.friends = []

    def get_birth(self):
        print("%s is giving birth to a baby." % self.name)


p1 = People("Adam", 26)
p1.eat()
print("%s is %s years old." % (p1.name, p1.age))
p1.sleep()

m1 = Man("Alex", 28)
m1.eat()
m1.working_hard()
m1.sleep()
m1.make_friends(p1)
print(m1.friends[0].name)

w1 = Woman("Shell", 27)
w1.get_birth()
w1.sleep()