Execute js function using websocket and wait to return value to python code and vice versa

Published: 25 November 2023
on channel: CodeMore

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Sure, I can guide you through creating a tutorial on executing JavaScript functions using WebSockets and waiting for the return value in Python, and vice versa. We'll use the Python websockets library for the WebSocket communication.
Open your terminal and run the following command to install the websockets library:
Create a Python file, let's call it websocket_server.py:
This code sets up a WebSocket server on localhost at port 8765. It listens for incoming messages, treats them as JavaScript functions, executes them, and sends the result back.
Create another Python file, let's call it websocket_client.py:
This code connects to the WebSocket server, sends a JavaScript function (in this case, a simple addition function), and waits for the result.
Open two terminals and run the server in one terminal:
In the other terminal, run the client:
You should see the result of the JavaScript function printed in the client terminal.
Now, let's create a simple HTML file with JavaScript to act as the WebSocket client. Create an HTML file, e.g., websocket_client.html:
Open this HTML file in a browser. It will connect to the Python WebSocket server, send a JavaScript function, and log the result received from the server.
Congratulations! You've created a bidirectional communication system between Python and JavaScript using WebSockets. You can expand on this foundation to create more complex interactions as needed.
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