Python inheritance - how to call grandparent method?

Question

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

What shall be written instead of ... so that the grandparent method foo in class A is called? I tried super().foo(), but it just calls parent method foo in class B.

I am using Python 3.

Answer 1

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 

Answer 2

Calling a parent's parent's method, which has been overridden by the parent There is an explanation in this discuss already on how to go back in the tree.