Variable no longer exists

I get this Indigo error sporadically. This python file contains a script that gets the ON/OFF status from my Samsung TV and returns it. The action stores the result (true/false) in a variable,. It runs n a schedule every 30 seconds. Not sure if the error is accurate, but seems to indicate that the variable is not there. It is.

It runs error free 90% of the time. Matt & Jay, the error itself also has a typo

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Jan 20, 2022 at 6:20:47 PM
   Action Collection Error         Run Shell Script action: varible used to store script result for script /Library/Application Support/Perceptive Automation/Python2-includes/tvgetstatus.py no longer exists.



[matt (support)]

Can you post the complete script?

Can you post the complete script?

Here's the script. It runs as Shell Script and places the output in the variable listed

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#! /usr/bin/env python3
# -*- coding: utf-8 -*-

import sys
import os
from samsungtvws import SamsungTVWS
import signal
import urllib3

urllib3.disable_warnings()
sys.path.append('../')


def signal_handler(signum, frame):
    raise Exception("Timed out!")


def status_function_call():
    tv = SamsungTVWS('192.168.1.209')

    # Autosave token to file
    token_file = os.path.dirname(os.path.realpath(__file__)) + '/tv-token.txt'
    tv = SamsungTVWS(host='192.168.1.209', port=8002, token_file=token_file)
    info = tv.rest_device_info()
    tvState = info['device']['PowerState']

    return tvState


signal.signal(signal.SIGALRM, signal_handler)
signal.alarm(5)   # Five seconds

try:
    tvstatus = status_function_call()
except Exception as msg:
    tvstatus = 'off'

print(tvstatus.strip(), end="")


tvstatus.png (102.32 KiB) Viewed 953 times

[jay (support)]

I suspect that the output from your script sometimes results in garbage, so when we try to update the variable it fails. I'm not sure how, but there is only one line of code in the try block that results in that error message. Only two things can result: either the variable doesn't exist or the output is somehow bad. We assume that the script output is a valid string, but it's possible that the script is returning something else. Since the variable can't be disappearing and reappearing with the same ID, then it must be the later.

I wonder if there is a scenario where tvstatus isn't actually a string, so tvstatus.strip() fails. I suspect that an uncaught exception might just cause the variable update to fail.

I added the following line to see if that is the case.

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if tvstatus not in ('on','off'):
    tvstatus = 'off'


I added the following line to see if that is the case.

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if tvstatus not in ('on','off'):
    tvstatus = 'off'


Since adding this line I haven't seen the error return. Tho it does seem that Indigo wasn't reporting the correct error