Question

Say I have the following:

class Parent(object):
    [...]
    def func(self, list):
        for item in list:
            if condition1:
                do something

class Child(Parent):
    [...]
    def func(self, list):
        for item in list:
            if condition1 and condition2:
                do something

What would be an elegant way to add condition2 to func without having to recopy the entire function? Note that I actually have two additional conditions in nested ‘ifs’.

Answer 1

If you have access to Parent, you could do

class Parent(object):
    [...]
    def _condition(self, whatever):
        return condition1
    def func(self, list):
        for item in list:
            if self._condition(...):
                do something

class Child(Parent):
    [...]
    def _condition(self, whatever):
        return condition1 and condition2