How to add an ID in SubscriptionHandler for increment operation?

[liuyazui]

In example client-subscription.py, I want to add an ID (int) in class SubscriptionHandler , and the ID is used for the increment operation. How can I do?

[schroeder-]

class SubscriptionHandler:
    def __init__(self, id):
          self.id = id

    """
    The SubscriptionHandler is used to handle the data that is received for the subscription.
    """
    def datachange_notification(self, node: Node, val, data):
        """
        Callback for asyncua Subscription.
        This method will be called when the Client received a data change message from the Server.
        """
        _logger.info(f'[Client {self.id}] datachange_notification {node} {val}')

....
handler = SubscriptionHandler(client_id)

[AndreasHeine]

its regular python class which just needs to implement the callbacks!