Question

I have a problem and I can’t seem to find a solution. I have 3 classes A, B and C, with A being the superclass.

class A(object):
    def __str__(self):
        self._general_representation(str)

    def _general_representation(self,to_string):
        (nominal_value, std_dev) = (self._nominal_value, self.std_dev())

    def std_dev(self)
        a = error_components()*something

    def error_components(self):
        return something

class B(A):


class C(B):

I want class C to be able to override the std_dev() and error_components() of the ‘grandparent’ class. How can I do this? I can’t change class A and B. Is there a way to this in python 3.3?

Answer 1

Just define them on class C. The functions are looked up on self, not on the class the calling method is defined in.

class C(B):
    def std_dev(self)
        return self.error_components() * something + something_else_again

    def error_components(self):
        return something_entirely_different