pynetworktables check server connection

[Thad House]

I am working on something for this weekend, and I was wondering if there was a way to check and see if the pynetworktables client has a way to see if it is connected to the server on the robot? If there isnt a direct way, is there a way to hack around and check?

[virtuald]

Yes, NetworkTables has a class called IRemoteConnectionListener that you can use with the AddConnectionListener/RemoveConnectionListener. I use the following code.

class RemoteListener(IRemoteConnectionListener):
    '''Calls a function when a table value is updated'''
    
    def __init__(self, connect_fn, disconnect_fn):
        '''fn must be a callable that takes (value)'''
        IRemoteConnectionListener.__init__(self)
        self.connect_fn = connect_fn
        self.disconnect_fn = disconnect_fn
        
    def attach(self, table):
        self.table = table
        table.AddConnectionListener(self, True)
        
    def detach(self):
        if hasattr(self, 'table'):
            self.table.RemoveConnectionListener(self)
        
    def Connected(self, remote):
        self.connect_fn(remote)
        
    def Disconnected(self, remote):
        self.disconnect_fn(remote)

[Thad House]

Thanks for the reply. While looking through all the functions, I found an IsConnected function in the NetworkTables library, and that seems to work just fine. Thanks though.