ros_deco.py

class RosNode(Node):

    def __init__(self, node_name: str=None):
        if node_name is not None:
            self._node_name = node_name
            super(RosNode, self).__init__(node_name)
            self.get_logger().info(
                f'Node: {node_name} registered')

    @classmethod
    def register(cls, name):
        rospy.init()
        node = cls(name)
        return node
        # return register_node

    def subscriber(self, topic_type, topic_name, cb_func):
        def register_subscriber(func):
            sub = self.create_subscription(String, 'chatter', cb_func, 10)
            return func
        return register_subscriber


rosnode = RosNode.register('dashboard')

def callback():
    print('In callback')


@rosnode.subscriber(String, 'test', callback)
def setup(args=None):
    pass



def main(args=None):
    # rospy.init(args=args)
    setup()
    # node = rospy.create_node('listener')
    # sub = node.create_subscription(String, 'chatter', callback, 10)