MMM-PythonPrint customisation

RobCee

@SDETWEIL, firstly, thank you for creating such a simple to follow module for talking to python. I have been trying to get that working for a while and was struggling.

My issue is that I require a specific library (zeep) for my python code to work, but if I include it in the code with the line include zeep , the module throws an error.

[01.04.2022 16:45.32.503] [LOG]   MMM-PythonPrint received a socket notification: CONFIG - Payload: [object Object]
[01.04.2022 16:45.32.507] [LOG]   PythonPrint spawning /opt/magic_mirror/modules/MMM-PythonPrint/test.py
[01.04.2022 16:45.32.606] [ERROR] Whoops! There was an uncaught exception...
[01.04.2022 16:45.32.614] [ERROR] ReferenceError: data is not defined
    at ChildProcess.<anonymous> (/opt/magic_mirror/modules/MMM-PythonPrint/node_helper.js:20:65)
    at ChildProcess.emit (node:events:394:28)
    at Process.ChildProcess._handle.onexit (node:internal/child_process:288:12)
    at onErrorNT (node:internal/child_process:477:16)
    at processTicksAndRejections (node:internal/process/task_queues:83:21)

Now, my python code runs successfully from the command line and I have commented everything else out while troubleshooting. I also see the same behaviour if I add the include zeep line into your sample .py files, which run correctly without this.

Any ideas what is going on? Could it be a path/user/install issue with the python module?

Cheers, RobCee

diemen112

Thank you for the help,
I made it work with adding some python dependent directory’s to the docker-compose file

sdetweil

@RobCee its because python has its own library path…

see here, https://stackoverflow.com/questions/55565924/error-importing-installed-python-packages-in-nodejs-pyshell

last post, for the approach to solve in your python script.
(if you don’t login, then u have to cursor over some strikethrus… (dumb)…)

I don’t know python that well, so I don’t know if there is a way to catch the include failure and then add the path and then redo the include) … altho it shouldn’t hurt to always add the path as it would be there from the commandline

RobCee

@sdetweil I thought it would be something daft like this. Thanks for the pointer, I will take a look and see if I can resolve it.
Super speedy response too.

sdetweil

@RobCee were you able to resolve the exec of the python script?

RobCee

@sdetweil I haven’t managed to get it running yet.
I did have some success (I had it printing Hello on the screen), but then the wheels came off and I have been unable to get it working again.

I have reverted to the default configuration from your Github page to try and wiork out what is going on, but I am seeing the following in the logs:

[11.04.2022 16:30.34.903] [LOG]   Connecting socket for: MMM-PythonPrint
[11.04.2022 16:30.34.907] [LOG]   Starting module helper: MMM-PythonPrint
[11.04.2022 16:30.43.341] [LOG]   MMM-PythonPrint received a socket notification: CONFIG - Payload: [object Object]
[11.04.2022 16:30.43.346] [LOG]   PythonPrint spawning /opt/magic_mirror/modules/MMM-PythonPrint/printitonce.py
[11.04.2022 16:30.43.531] [ERROR] Whoops! There was an uncaught exception...
[11.04.2022 16:30.43.556] [ERROR] ReferenceError: data is not defined
    at ChildProcess.<anonymous> (/opt/magic_mirror/modules/MMM-PythonPrint/node_helper.js:20:65)
    at ChildProcess.emit (node:events:390:28)
    at Process.ChildProcess._handle.onexit (node:internal/child_process:288:12)
    at onErrorNT (node:internal/child_process:477:16)
    at processTicksAndRejections (node:internal/process/task_queues:83:21)

Which seems to be the same error as before, but now I am not using any 3rd party modules, just the sample code.

sdetweil

@RobCee said in MMM-PythonPrint customisation:

ReferenceError: data is not defined

are u launching ‘python’ or python3?

the default
const python=‘python’

RobCee

@sdetweil I am using python3 and I have updated the two references to ‘python’ -> ‘python3’ to reflect this

sdetweil

@RobCee right, you don’t have to change the code, just use the config.js setting

{ 
module:
     config: {  
         pythonName:'python3',
    }
}

RobCee

@sdetweil ok, I will try it there then and see what happens.
Tracking down errors in this MM OS is fun…

sdetweil

@RobCee o, I see that I have a potential bug… if the command: is not configured,
it defaults to “”… oops…

I just pushed an update got that

git pull in the module folder

to debug

add debug: true

and then look where u start MM… (this doing npm start )

[11.04.2022 10:55.13.087] [LOG]   MMM-PythonPrint received a socket notification: CONFIG - Payload: [object Object]
[11.04.2022 10:55.13.087] [LOG]   PythonPrint spawning modules/MMM-PythonPrint/printit.py
.
.
.
.
[11.04.2022 10:55.18.114] [LOG]   PythonPrint sending program output=hello