from collections import Counter
class FancyCounter(Counter):
def commonest(self):
(value1, count1), (value2, count2) = self.most_common(2)
if count1 == count2:
raise ValueError("No unique most common value")
return value1
class A:
def method1(arg1, arg2):
# do code here
class B:
A.method1(1,2)