Singleton v1

singleton.py

# Versión Singleton más parecida a Java
class Singleton(object):
    
    __instance = None

    def __new__(cls):
        if Singleton.__instance is None:
            Singleton.__instance = object.__new__(cls)

        return Singleton.__instance

if __name__ == '__main__':

    singleton1 = Singleton()
    singleton2 = Singleton()

    print(singleton1 is singleton2)