开云体育

  1. Jmriusers
  2. Topics

Changing signal Mast Aspect with jython #jython #signalheads

 

Here is a list of signal mast i have set up
does anyone have the syntax for jython to change the aspect of the signal.?

i’m not finding it anywhere.?
 

On 3/19/2025 9:28 PM, Canadian Locomotive Logistics via groups.io wrote:
Here is a list of signal mast i have set up
does anyone have the syntax for jython to change the aspect of the signal.
i’m not finding it anywhere.
See JMRI's SignalMastFollower.py script. It uses:

self.outSignal.setAspect(self.inSignal.getAspect())

This is what that script needs to do to make one signal mast reflect another signal mast's aspect. There are a number of requirements that make this a usable solution. One limitation is that the signal referred to in "self.outSignal" does NOT implement Signal Mast Logic!

One can instead allow a script to "selectively-override" a mast's SML-defined Aspect information. One can implement Signal Mast Logic for the signal mast, and implement a "listener" to trigger a script bit that can determine when the aspect is not appropriate, and "override" the Aspect.

Note that the mast might possibly show the original Aspect, briefly before showing the "overridden" Aspect.

To avoid this, one _could_ implement something more like a "signalMastFollower.py" script, with optional Aspect-overriding, and displaying the overridden Aspect on the physical mast. This would probably not be appropriate for any kind of JMRI "automation", though, unless your automation mechanism does not rely on the overridden Aspect, or unless some other "hack" is used.

(It _might_ be appropriate to create a new "signal mast" type for the "Prototype Signaling System", rather than hacking a Jython script, though! That might be a better solution than hacking the Aspect via Jython...)
 

The information is in the JMRI Javadoc. ?For signal masts, it is at?

Here is a Jython fragment.

mast = masts.getSignalMast('mast name')
if mast:
??? mast.setAspect('aspect name')
else:
??? print 'Mast not found'???????

The "if" statement checks to see if the mast was found. ?The name literals can also be variable names that have valid content.
? ? ??
Dave Sand


----- Original message -----
From: "Canadian Locomotive Logistics via groups.io" <CanadianLocomotiveLogistics=[email protected]>
Subject: [jmriusers] Changing signal Mast Aspect with jython #jython #signalheads
Date: Wednesday, March 19, 2025 8:28 PM

Here is a list of signal mast i have set up
does anyone have the syntax for jython to change the aspect of the signal.?
i’m not finding it anywhere.?
 

Mast name is system name or user name?
?
?
 

Either name will work. ?I use the user name.

Dave Sand



----- Original message -----
From: "Canadian Locomotive Logistics via groups.io" <CanadianLocomotiveLogistics=[email protected]>
Subject: Re: [jmriusers] Changing signal Mast Aspect with jython #jython #signalheads
Date: Wednesday, March 19, 2025 11:11 PM

Mast name is system name or user name?
?
?
 

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.")
 

then again chatGPT use code for signal head.... try again. lol
?
 

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=[email protected]>
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.")
 

thanks last night. I spent a good two hours playing around and I get the signals to change.
?
Frustrating though using the script
?
It doesn’t give me any feedback like syntax air like I’m used to with visual basic
?
For now, I have a track sensor DB 20, and as a locomotive approaches, I just want the signal to change
And then on a timing schedule the next four signals to change in succession but delayed
?
I want the engineer to see the signals change aspect
?
I really need a tutor on scripting.?

Anyone up for online classes?

1 - 9 of 9