Python inheritance - how to call grandparent method?

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情深已故
情深已故 2021-02-11 19:12

Consider the following piece of code:

class A:
  def foo(self):
    return \"A\"

class B(A):
  def foo(self):
    return \"B\"

class C(B):
  def foo(self):
            


        
2条回答
  •  一整个雨季
    2021-02-11 19:53

    There are two ways to go around this:

    Either you can use A.foo(self) method explicitly as the others have suggested - use this when you want to call the method of the A class with disregard as to whether A is B's parent class or not:

    class C(B):
      def foo(self):
        tmp = A.foo(self) # call A's foo and store the result to tmp
        return "C"+tmp
    

    Or, if you want to use the .foo() method of B's parent class regardless of whether the parent class is A or not, then use:

    class C(B):
      def foo(self):
        tmp = super(B, self).foo() # call B's father's foo and store the result to tmp
        return "C"+tmp
    

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