Method __init__

examples/server-ua-python-mirror.py:42–59

(self, opcua_server, ua_node)

    Python can write to children via write method, which will trigger an update for UA clients
    """
    def __init__(self, opcua_server, ua_node):
        self.opcua_server = opcua_server
        self.nodes = {}
        self.b_name = ua_node.get_browse_name().Name

        # keep track of the children of this object (in case python needs to write, or get more info from UA server)
        for _child in ua_node.get_children():
            _child_name = _child.get_browse_name()
            self.nodes[_child_name.Name] = _child

        # find all children which can be subscribed to (python object is kept up to date via subscription)
        sub_children = ua_node.get_properties()
        sub_children.extend(ua_node.get_variables())

        # subscribe to properties/variables
        handler = SubHandler(self)
        sub = opcua_server.create_subscription(500, handler)
        handle = sub.subscribe_data_change(sub_children)

    def write(self, attr=None):
        # if a specific attr isn't passed to write, write all OPC UA children