Exercise 42: Is-A, Has-A, Objects, and Classes
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Exercise 42: Is-A, Has-A, Objects, and Classes
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## Animal is-a object (yes, sort of confusing) look at the extra credit
class Animal(object):pass
## ??
class Dog(Animal):def __init__(self, name): ## ??self.name = name
## ??
class Cat(Animal):def __init__(self, name): ## ??self.name = name
## ??
class Person(object):def __init__(self, name): ## ??self.name = name
## Person has-a pet of some kindself.pet = None
## ??
class Employee(Person):def __init__(self, name, salary): ## ?? hmm what is this strange magic?super(Employee, self).__init__(name) ## ??self.salary = salary
## ??
class Fish(object):pass
## ??
class Salmon(Fish):pass
## ??
class Halibut(Fish):pass
## rover is-a Dog
rover = Dog("Rover")
## ??
satan = Cat("Satan")
## ??
mary = Person("Mary")
## ??
mary.pet = satan
## ??
frank = Employee("Frank", 120000)
## ??
frank.pet = rover
## ??
flipper = Fish()
## ??
crouse = Salmon()
## ??
harry = Halibut()
?
轉(zhuǎn)載于:https://www.cnblogs.com/hluo/p/4054211.html
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