Question about executing python files with node.js "child_process"

[steliosaccusonus]

Hello!
I am trying to execute a python file in my PP extention, i read that 'node.js' and 'child_process' is the way to go if you want to run CLI commands in javascript, so i went to my XML file and enabled it ( it works as it should with other methods like "fs"). Also i have a folder inside my extention with all the necessery modules that i want to use. I tried to execute the same piece of code as a seperate .js file and it works fine. In my extention panel  a button is attached to call the function but nothing happens, it completely ignores it.

These are the functions i am trying to use:

<script src="./lib/CSInterface.js"></script>
		<script src="./lib/jquery-1.9.1.js"></script>
		<script type="text/javascript">

			function execute (command) {			
				const  exec  = require('child_process').exec
				exec(command, (err, stdout, stderr) => {
					process.stdout.write(stdout)
				})
			}
			function runPython() {
				execute('python pythonFile.py')
			}
		</script>

The runPython function is attached to a run-button in the index.html file that should execute the scirpt. I tried to use the "child_process" method with many differend compinations but i can't figure out what might be the probelm here. Any ideas on the subject? Has anyone expirienced something similar?
Thanks in advantage.

[Bruce Bullis · Accepted solution]

Here's a JavaScript function that builds and executes a Python command line, from within a panel. 

function processMoGRT (){
    var csInterface = new CSInterface();
    var OSVersion   = csInterface.getOSInformation();
    var filetypes = new Array();
    filetypes[0] = "mogrt";
    var result = window.cep.fs.showOpenDialog(false,false,"Select a .mogrt file", "~/Desktop",filetypes);
 
    var mogrtPath = result.data[0];


    var extPath    = csInterface.getSystemPath(SystemPath.EXTENSION);
    
    var sep        = "/";

    if (OSVersion.indexOf("Windows") > 0){
        sep = "\\\\";    
    }

    var mogrtParentPath = mogrtPath.substring(0, mogrtPath.lastIndexOf(sep));

    var pyPath = extPath + sep + 'Foiltop.py';

    var processResult = window.cep.process.createProcess("usr/bin/python", pyPath, mogrtPath);
    
    if (OSVersion.indexOf("Windows") >=0){
        window.cep.process.createProcess("C:\\Windows\\explorer.exe", mogrtParentPath);
    } else {
        window.cep.process.createProcess("/usr/bin/open", mogrtParentPath);
    }
    var resultFileName = mogrtParentPath + sep + "Foiltop_results.txt";
    
    var resultFileContents = window.cep.fs.readFile(resultFileName);//, cep.encoding.Base64);
    
    if (0 === result.err) {
        alert(resultFileContents.data);
    } else {
        alert("Failed to read results file.");
    }

[kuaiyl353582254d18 · Accepted solution]

window.cep.process.createProcess("C:\\Windows\\explorer.exe", mogrtParentPath);

I also want to use this method, but what should I do if I report the error "window is undefined"