is that all you want your module to present, one line?

or do you want the output every few seconds minutes

this is repetative:false, but my module will rerun the script every cycle time milliseconds

but some python scripts do that internally.

print, sleep, print, sleep, print, sleep, print…

this is repetative: true
my module will just start the python script

there are two different ways to capture the output

should have named parm

script_is_long_running

I provided a sample of each

also, in many cases, you are using someone else’s script and don’t have control over how it works, and don’t want to rewrite it

is this correct logic for true and false?

repetative: true
if your python script runs in a loop forever by itself so the spawn in node helper will just keep its connection to the python script open

repetative: false
if your python script runs one time, and you need node_helper to keep spawning over and over so you can get the info from the python script over and over

Thank you for this MMM-PythonPrint. More than the sample module this really helped me follow how to wrap my head around how the script.js node_helper and anything else work together. The way you worded the variables and the input and output text really made sense and made it easy to follow what is happening. I am learning a lot. Again, Thank you.

Kelly

I have added - /usr/bin/python3:/usr/bin/python3 to the docker compose

this will not work. You have to use the fat image, see my post above (Apr 11)

running under docker is a fun experience?

did u install python as part of the container startup?

[15.07.2022 14:23.42.599] [LOG]   MMM-PythonPrint received a socket notification: CONFIG - Payload: [object Object]
[15.07.2022 14:23.42.602] [LOG]   PythonPrint spawning /opt/magic_mirror/modules/MMM-PythonPrint/print_test.py using python3
[15.07.2022 14:23.42.686] [LOG]   PythonPrint program error=Could not find platform independent libraries <prefix>
Could not find platform dependent libraries <exec_prefix>
Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
Fatal Python error: initfsencoding: unable to load the file system codec
ModuleNotFoundError: No module named 'encodings'

Current thread 0x76fb37a0 (most recent call first):

a played around with adding $PYTHONHOME to env but without any result
does anyone know a work around to find the libraries?

Hurrah! It works!

 TypeError: this.file is not a function

this.config.command=this.config.command.slice(his.config.pythonName.length)

git pull to get the update

[12.04.2022 11:22.45.613] [LOG]   MMM-PythonPrint received a socket notification: CONFIG - Payload: [object Object]
[12.04.2022 11:22.45.619] [ERROR] Whoops! There was an uncaught exception...
[12.04.2022 11:22.45.640] [ERROR] ReferenceError: _this is not defined
    at Class.startit (/home/pi/MagicMirror/modules/MMM-PythonPrint/node_helper.js:27:24)
    at Class.socketNotificationReceived (/home/pi/MagicMirror/modules/MMM-PythonPrint/node_helper.js:46:9)
    at Socket.<anonymous> (/home/pi/MagicMirror/js/node_helper.js:109:11)
    at Socket.emit (node:events:390:28)
    at Socket.emitUntyped (/home/pi/MagicMirror/node_modules/socket.io/dist/typed-events.js:69:22)
    at /home/pi/MagicMirror/node_modules/socket.io/dist/socket.js:466:39
    at processTicksAndRejections (node:internal/process/task_queues:78:11)

This is my config section:

		{
			module:"MMM-PythonPrint",
			position:"center",
			disabled:false,
			config: {
				// name of the python process to execute (could be python3)
				pythonName: 'python',
				// command file in module folder
				// if false, YOU will provide the full path to the python program
				localfolder: true,

				// spawn a python pgm that writes over and over (timed maybe), but keeps running
				command: 'printit.py',
				repetative: true,

				// spawn a one time output  script, but relaunch it every cycletime milliseconds

				// repretative: false,
				// command: 'printitonce.py',
				cycletime: 2000,

				// print debugging messages from the node_helper
				debug: true
			}
		 },

yes, the docs … no native english speaker so docs are always a struggle. Thanks for the hints, will update …

The difference between latest and fat is image size and installed

those words are not used above that sentence, and so didn’t mean anything to me…

I would propose adding in front of that sentence

There are two images of each type created

latest and fat 
docker pull image_name:latest 
or
docker pull image_name:fat 

and then I would add a new line between these sentences

debian packages. For most use cases the latest image is sufficient. 
Some modules need dependencies which are not includes in latest, e.g

the docker image karsten13/magicmirror:latest doesn’t contain python. Simplest solution for this is to use the fat image karsten13/magicmirror:fat, for more infos: https://khassel.gitlab.io/magicmirror/images/

xxx.js
then
node xxx.js

at least to get your main function working…

this code would work in the node helper

I might open an issue of the docker image to allow a folder/file with additional packages to install at startup…

seems a waste to do it every refresh time tho

long ago and far away (2015) I had a product to install in an image, 1.5 GIG of product, and didn’t want to make a separate image for the different versions…

so I figured out how to install and capture that as a tarfile, and then
untar it as part of the startup…

then the start script passed that as a parm to startup, so I could change the product on the fly, using the same tiny image…