returncode to bash is always 0

[b0wtie]

Describe the bug

When I use bash to invoke decode-config.py to backup or restore my tasmota-devices, I always get a returncode of 0, even if the operation fails. This troubles me, because I only want to reset and / or upgrade my device once I have a working backup.

To Reproduce

• I installed Python on a Debian Bookworm machine. I was unable to install the required "configargparse" module via pip, because Python runs in an externally managed environment.
• So I set up a venv envireonment for my Tasmotascript under this path: /root/00-Tasmota/Tasmotascript
• I activated the environment in my script like this:

Tasmota_Path=/root/00-Tasmota/Tasmotascript
source $Tasmota_Path/venv/bin/activate
# here the script does some testing for old backup files and walks through an array of IPs, but the line in question is this one:
$Tasmota_Path/venv/bin/decode-config.py -s $tasmota_ip --backup-file $Tasmota_Path/backups/$tasmota_ip.dmp
status=$?
if [ $status -eq 0 ]; then
  echo "backup successfully done"
else
  echo "there was an error during the backup"
fi

Expected behavior

If i use a non-tasmota IP in the $tasmota_ip variable, the backup option fails and the bash script should see the return code.

Version Information

Script:   decode-config.py
Version:  13.1.0.2 [3fb1a98]
Python:   3.11.2
Platform: Linux-6.1.0-13-amd64-x86_64-with-glibc2.36 - x86_64
OS:       Linux 6.1.0-13-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.55-1 (2023-09-29)
Time:     2023-10-08 17:01:43

System' information of your Tasmota data

Append -g System to your decode-config parameter, e. g. decode-config.py -s myconfig.dmp -g System

Even when appending -g System to the call of decode-config in my script, it still always returns 0.

Additional context

Please be patient with me if this has to do with my bad understanding of venvs and not with decode-config. Thank you very much!

Edit: I installed the librarys systemwide with "--break-system-packages" flag. This way I can run the decode-config.py "directly" without a virtual environment. This also always returns 0.