如何在 Node.js 中使用 Python 機器學習？

Calling Python Functions from Node.js

A common challenge encountered when using both Node.js and Python in a project is the need to utilize Python's machine learning capabilities from within Node.js. Fortunately, there is a simple solution using the "child_process" module in Node.js.

To call a Python function from Node.js, follow these steps:

1. Install the "child_process" module:

npm install child_process

2. Import the module into your Node.js script:

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

3. Create a Python script file that the Node.js process will call.
4. Create a pythonProcess variable by using the spawn method with the python command, the path to your Python script, and any necessary arguments:

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

5. In Python script, import the sys module.
6. Handle the arguments passed from Node.js using sys.argv.
7. To send data back to Node.js:

print(dataToSendBack)
sys.stdout.flush()

8. In Node.js, listen for data from the Python process using pythonProcess.stdout.on('data').

Remember, the spawn method allows multiple arguments, making it possible to structure your Python script to call specific functions.

This method provides a straightforward way to leverage Python's capabilities within your Node.js applications.

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