工程项目结构如下：

包AnimalShow和Class_test是同级包，AnimalShow是父类，Gound,Sea,Sky继承它，Chicken继承Gound和Sky

首先是Gound.py引入Animal模块，如下

#!/usr/bin/python
# -*- coding: UTF-8 -*-
from AnimalShow.Animal import Animals

class Gound_Animal(Animals) :
    def __init__(self , name , age , message):
        self.age = age
        self.name = name
        self.message = message
        print("Gound_Animal初始化完毕")

    def printA(self):
        print("name : %s, age : %d, message : %s" % (self.name, self.age, self.message))

    def GG(self):
        print("我是Gound_Animal独有方法")

Sky和Sea同理

    下面是同级包的导入，Chicken引入Gound和Sky,如下，

#!/usr/bin/python
# -*- coding: UTF-8 -*-
from AnimalShow import Gound_Animals,Sky_Animals

class chicken(Gound_Animals.Gound_Animal,Sky_Animals.Sky_Animal):

    def __init__(self, name, age, message):
            self.age = age
            self.name = name
            self.message = message
            print("chicken初始化完毕")
    def printA(self):
        print("name : %s, age : %d, message : %s" % (self.name, self.age, self.message))
    def CC(self):
        print("我是chicken独有方法")

if __name__ == "__main__":
    GA = Gound_Animals.Gound_Animal("陆地动物",10,"我是陆地动物")
    CK = chicken("小鸡",2,"小鸡")
    CK.printA()
    CK.CC()
    CK.GG()
    CK.hobby()

测试结果：