How to Invoke Python Functions from Your Node.js Applications?

Calling Python Functions from Node.js Applications

For projects involving machine learning algorithms implemented in Python, integrating these functions into Node.js applications can be a seamless process. Here's how to achieve this using the "child_process" package in Node.js.

Using the "child_process" Package

1. Import the "child_process" package:

const { spawn } = require("child_process");

2. Spawn a Python process:

const pythonProcess = spawn('python', ["path/to/script.py", arg1, arg2, ...]);

Interacting with the Python Script

In the Python script, ensure that you import the "sys" module. Access arguments from Node.js using:

# In Python script
import sys
arg1 = sys.argv[1]
arg2 = sys.argv[2]

To return data to Node.js, use:

# In Python script
print(dataToSendBack)
sys.stdout.flush()

Reading Data in Node.js

In Node.js, listen for data using:

pythonProcess.stdout.on('data', (data) => {
  // Handle received data
});

Customizing Function Invocation

By passing multiple arguments to the Python script, you can design the script to handle different functions based on a specified argument. This allows you to reuse the script for various function calls.

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