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概念

super作为python的内建函数。主要作用如下：

允许我们避免使用基类

跟随多重继承来使用

实例

在单个继承的场景下，一般使用super来调用基类来实现：

下面是一个例子：

class Mammal(object):

def __init__(self, mammalName):

print(mammalName, 'is a warm-blooded animal.')

class Dog(Mammal):

def __init__(self):

print('Dog has four legs.')

super().__init__('Dog')

d1 = Dog()

输出结果：

➜ super git:(master) ✗ py super_script.py

Dog has four legs.

Dog is a warm-blooded animal.

super在多重继承里面的使用：

下面是一个例子：

class Animal:

def __init__(self, animalName):

print(animalName, 'is an animal.');

class Mammal(Animal):

def __init__(self, mammalName):

print(mammalName, 'is a warm-blooded animal.')

super().__init__(mammalName)

class NonWingedMammal(Mammal):

def __init__(self, NonWingedMammalName):

print(NonWingedMammalName, "can't fly.")

super().__init__(NonWingedMammalName)

class NonMarineMammal(Mammal):

def __init__(self, NonMarineMammalName):

print(NonMarineMammalName, "can't swim.")

super().__init__(NonMarineMammalName)

class Dog(NonMarineMammal, NonWingedMammal):

def __init__(self):

print('Dog has 4 legs.');

super().__init__('Dog')

d = Dog()

print('')

bat = NonMarineMammal('Bat')

输出结果：

➜ super git:(master) ✗ py super_muli.py

Dog has 4 legs.

Dog can't swim.

Dog can't fly.

Dog is a warm-blooded animal.

Dog is an animal.

Bat can't swim.

Bat is a warm-blooded animal.

Bat is an animal.

参考文档

https://www.programiz.com/python-programming/methods/built-in/super

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本文标题: python super用法及原理详解

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