Sorry, but that is garbage.
You cannot get an instance of an object by requesting the object from its class. ?It has to be done using the object's manager. ?The JMRI scripting environments includes aliases for the common managers, such as masts for signal masts.
Signal mast aspects are NOT set by changing the signal head appearance. ?That assumes that the signal mast is build using signal heads which is not a valid assumption. ?Even if built using signal heads, there can be more than one head.
import java
import jmri
signal_mast = masts.getSignalMast("Signal Mast, Table 12, Track 5, West Bound")
if signal_mast:
??? signal_mast.setAspect('aspect name')
else:
??? print("Signal Mast 'Signal Mast, Table 12, Track 5, West Bound' not found.")
Dave Sand
----- Original message -----
From: "Canadian Locomotive Logistics via groups.io" <CanadianLocomotiveLogistics=
gmail.com@groups.io>
Subject: Re: [jmriusers] Changing signal Mast Aspect with jython #jython #signalheads
Date: Thursday, March 20, 2025 6:47 PM
I have a new love now for ChatGPT....
?
# Import necessary JMRI classes
from jmri import SignalHead
from jmri import Reporter
# Get the SignalHead object for the signal mast
signal_mast = SignalHead.getSignalHead("Signal Mast, Table 12, Track 5, West Bound")
# Check if the signal mast exists
if signal_mast is not None:
? ? # To set the aspect, you'll need to use the setState method with one of the predefined aspects.
? ? # Here we set an example aspect. Adjust according to the available aspects.
? ??
? ? # For example, setting the signal to red (stop signal):
? ? signal_mast.setState(SignalHead.RED)
? ??
? ? # If you want to set to a different aspect, such as yellow or green, use:
? ? # signal_mast.setState(SignalHead.YELLOW) ?# for yellow
? ? # signal_mast.setState(SignalHead.GREEN) ? # for green
? ??
? ? # Optionally, you can get the current state to confirm if it was set correctly
? ? current_state = signal_mast.getState()
? ? print("Signal Mast aspect set to: ", current_state)
else:
? ? print("Signal Mast 'Signal Mast, Table 12, Track 5, West Bound' not found.")
