Python-сообщество

class A(object):
    def first(self, a,b):
        # some actions
        pass
   def second(self, a,b):
        # some other actions
        pass
class B(A):
    def first(self, a,b):
        if a>b:
            return super(B, self).first(a,b)
        #otherwise make actions
    @need_to_call_super
    def second(self,a,b):
        # here we are sure,  the code below will be executed only if condition "a>b" hasn't passed, otherwise super(B,self).second(a,b) was called 
        # code

# -*- coding: utf-8 -*-
def deco(func, *args, **kargs):
    def wrapper(*args, **kargs):
        if args[1]>args[2]:
            return getattr(args[0].__class__.mro()[1], func.__name__)(*args, **kargs)
        else:
            return func(*args, **kargs)
    return wrapper
class A(object):
    def first(self, a, b):
        return a+b
    def second(self, a, b):
        return 2*(a+b)
class B(A):
    @deco
    def first(self, a, b):
        return a*b
    @deco
    def second(self, a, b):
        return 2*a*b
b=B()
print b.first(2, 5)
print b.first(5, 2)
print b.second(2, 5)
print b.second(5, 2)

10
7
20
14

def deco(func):
    def wrapper(self, *args, **kwargs):
        if args[0] > args[1]:
            return getattr(super(self.__class__, self), func.__name__)(*args, **kwargs)
        return func(self, *args, **kwargs)
    return wrapper