no print statement from pyton to node console

[ManabBala]

Describe the bug tried while loop to get print statement but to realtime console log of the print statemnt.

pyshell.on('message', function (message) {
  // received a message sent from the Python script (a simple "print" statement)
  console.log(message);
});

this give print statement after code after completion.

Python code

print("hello, world")

Javascript code

//Import express.js module and create its variable.
import express from "express";
const app = express();

//Import PythonShell module.
import { PythonShell } from "python-shell";

//Router to handle the incoming request.
app.get("/", (req, res, next) => {
	//Here are the option object in which arguments can be passed for the python_test.js.
	let options = {
		mode: "text",
		pythonOptions: ["-u"], // get print results in real-time
		// scriptPath: "", //If you are having python_test.py script in same folder, then it's optional.
		args: ["shubhamk314"], //An argument which can be accessed in the script using sys.argv[1]
	};

	PythonShell.run("python_test.py", options, function (err, result) {
		if (err) throw err;
		// result is an array consisting of messages collected
		//during execution of script.
		console.log("result: ", result.toString());
		res.send(result.toString());
	});
});

//Creates the server on default port 8000 and can be accessed through localhost:8000
const port = 8000;
app.listen(port, () => console.log(`Server connected to ${port}`));

Expected behavior should have gotten the hellow, world at the bash terminal of the server code.

Actual behavior nothing happened/showing...

Other Information (please complete the following information):

• OS: [e.g. Windows11]
• Python Version [e.g. 3.6]
• Node Version [e.g. 21]

Additional context Add any other context about the problem here.

[ManabBala]

let options = {
mode: "json",
pythonOptions: ["-u"], // get print results in real-time
// scriptPath: "", //If you are having python_test.py script in same folder, then it's optional.
args: ["arguments"], //An argument which can be accessed in the script using sys.argv[1]
};

let pyshell = new PythonShell("python_test.py", options);

pyshell.on("message", function (message) {
// received a message sent from the Python script (a simple "print" statement)
console.log(message);
});

This work as expected, getting realtime print statement

[Almenon]

This is intentional, but I see why you are confused because the readme does not have a good example. As you found out you can use pyshell.on("message" with -u to give you real time print results.