Learn Python the hard way, ex45 对象、类、以及从属关系

#!/usr/bin/python
#coding:utf-8
# animal is-a object(yes,sort of sonfusing)look at the extra credit
class Animal(objeck):
    pass

#Dog 类 继承 Animal
class Dog(Animal):
    def __init__(self,name):
        #对 对象Dog赋值 name 
        self.name =name
#Cat 类 继承 Animal
class Cat(Animal):
    def  __init__(self,name):
        #对 对象 Cat 赋值 name 
        self.name=name

#建立类 Person
class Person(objeck):
    def __init__(self,name):
        ##对 对象 Person 赋值 name 
        self.name = name

        #Person has-a pet of some kind
        self.pet = none

#类 Employee 继承 Person
class Employee(Person):
    def __init__(self,name,salary)
    #? what is this strange magic?
    #使用超级继承 super ,对 Employee 增加初始化 init
    super(Employee,self).__init__(name)
    # 赋值 salary
    self.salary= salary

#建 类 Fish
class Fish(objeck):
    pass

#Salmon 类 继承 Fish
class Salmon(Fish):
    pass
#Halibut 类 继承 Fish
class Halibut(Fish):
    pass

#rover is-a Dog
rover = Dog('rover')
#satan is-a Cat
satan = Cat('satan')
#mary is-a Person
mary = Person('mary')
#mary has-a pet,pet(name) is satan
mary.pet = satan
#frank is-a Employee frank.salary = 12000
frank = Employee('frank',12000)
#fank has-a pet,pet(name) = rover
frank.pet rover
#flipper is-a Fish
flipper =Fish()
#crouse is-a Salmon
crouse =Salmon()
#harry is-a Halbut
harry = Halibut()

没有写别的