python super用法及原理详解

这篇文章主要介绍了python super用法及原理详解,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

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

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