Class Subscription¶
- class sila2.client.Subscription¶
Subscription to a stream of items provided by a SiLA Server
- add_callback(func: Callable[[ItemType], Any]) None¶
Add a function to be called on every value update. Can only be used while this subscription is not cancelled.
- Parameters:
func – Function to be called on every value update. It will be called with the new value as positional parameter:
func(new_value)- Raises:
RuntimeError – If this subscription was cancelled
Notes
Can be used as a context manager:
with thing.subscribe() as subscription: do_something(subscription) # subscription is cancelled here