What is the purpose of checking self.__class__ ? - python

Question

What is the purpose of checking self.__class__ ? I\'ve found some code that creates an abstract interface class and then checks whether its self.__class__

Answer 1

The code that you posted there is a no-op; self.__class__ == c1 is not part of a conditional so the boolean is evaluated but nothing is done with the result.

You could try to make an abstract base class that checks to see if self.__class__ is equal to the abstract class as opposed to a hypothetical child (via an if statement), in order to prevent the instantiation of the abstract base class itself due to developer mistake.