Restoring a subscription after the server connection is lost

[shayakhmetovi]

I use client python-opcua to connect to server node-opcua. The connection status is monitored by keepalive. Created a subscription for 10-20 nodes.
Is it possible to check the subscription status: is it working or not? or how to catch that the subscription is no longer active? Is there any mechanism to restore the subscription? For example, the server disconnects and the subscription needs to be restored

[schroeder-]

Switch to asyncua first.
Then you can used a modified https://github.com/FreeOpcUa/opcua-asyncio/blob/master/examples/client-reconnect.py.

If you add/remove nodes on demand, you have to remember the subscribed nodes your self, for example make a list or dict and store all subscribed nodes. When you reconnect you subscribe to all nodes in this list.