Cython simple class

def example6():
    """Cython simple class"""

    ray.init()

    cls = ray.remote(cyth.simple_class)
    a1 = cls.remote()
    a2 = cls.remote()

    result1 = ray.get(a1.increment.remote())
    result2 = ray.get(a2.increment.remote())

    print(result1, result2)