How to access the parent class in python class nesting-PHP Chinese Network Q&A

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How to access the parent class in python class nesting

淡淡烟草味 2017-05-18 10:52:40

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#!/usr/bin/env python  

class parent:  
    def __init__(self):  
        self.name = 'parent'  
  
    def getName(self):  
        print(self.name)

    class child:
        def getName(self):
            #如何访问到父类的name值
  
  
if __name__ == '__main__':  
    child =  parent.child()  
    child.getName()

淡淡烟草味

reply all(1)

左手右手慢动作2017-05-18 10:54:40 1 floor

parent.name does not exist before parent is instantiated, so child cannot access parent.name
There are two methods

class parent:  
    name = 'parent'  
  
    def getName(self):  
        print(self.name)

    class child:
        def getName(self):
            return parent.name
  
  
if __name__ == '__main__':  
    child =  parent.child()  
    child.getName()

Or instantiate the parent first and then pass the parameters in

class parent:  
    def __init__(self):  
        self.name = 'parent'  

  
    def getName(self):  
        print(self.name)

    class child:
        def __init__(self,parent):
            self.parent = parent

        def getName(self):
            return self.parent.name
  
  
if __name__ == '__main__':  
    parent = parent()
    child =  parent.child(parent)  
    child.getName()

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