Python 3.3 類別繼承

Python的繼承可以單獨繼承也可以多重繼承
單獨繼承的語法：

class a:
 ....
class b(a):
 ....

多重繼承的語法：

class a:
 ....
class b:
 ....
class c(a, b):
 ....

在繼承時，會用到父類別時，就可以透過super來呼叫方法或是傳遞建構式子
super方法能帶入參數為Type以及Object


而我們要判斷類別有沒有繼承關係可以透過issubclass去得知，第一個參數帶入子類別，第二個參數帶入父類別

class Animal:
    def __init__(self):
        self.name = "animal"

    def __init__(self, name):
        self.name = name
        
    def output(self):
        print(self.name, end = ' ')

class Dog(Animal):
    def __init__(self, name):
        super(Dog,self).__init__(name)
        self.name = name

animal = Animal("CY")
animal.output()

dog = Dog("is")
dog.output()

animal2 = Dog("dog")
animal2.output()
print("\n", issubclass(Dog, Animal))
print("\n", issubclass(Animal, Dog))
print("\n", issubclass(Animal, object))

參考資料：
http://docs.python.org/3/tutorial/classes.html#inheritance
http://docs.python.org/3/tutorial/classes.html#multiple-inheritance
http://docs.python.org/3/library/functions.html#super
http://docs.python.org/3/library/functions.html#type
http://docs.python.org/3/library/functions.html#issubclass