继承中＞＞＞广度优先和深度优先的选择策略

新式类和经典类的区别在哪里???

就是在多继承上的顺序问题
py2经典类是按深度优先来继承得，新式类是按广度优先来继承的
py3经典类和新式类都是统一按广度优先来继承的

class People(object):  # 新式类    经典类和新式类在多继承上的方式有所不同
    def __init__(self, name, age):
        self.name = name
        self.age = age
        self.friends = []
        print("---doens't run ")

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

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

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


class Relation(object):
    def __init__(self, n1, n2):
        print("init in relation")

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


class Man(People, Relation):  # 如果两个都有够着函数的话，谁在前面就执行谁的实例化，从左到右。如果其中一个没有，就执行另外一个的构造函数