Install the required packages by running the following command:

sudo apt-get install python3-xmlrpc

1. Download the Python for Windows installer from the official Python website: https://www.python.org/downloads/windows/
2. Run the installer and follow the installation instructions. Make sure to select the option to add Python to the system PATH during the installation process.
3. Open a command prompt or PowerShell window.
4. Install the required packages by running the following command:

pip install xmlrpc.client
Once you have installed the necessary packages, you can proceed with running your Python script. However, there is an issue with the URL format in your code that causes the "unsupported XML-RPC protocol" error.

Update the URL line in your test_api.py script to include the "http://" or "https://" prefix, like this:

url = "http://127.0.0.1:8016"
or

url = "https://127.0.0.1:8016"

After making this change, save the script and try running it again. The error should be resolved, and you should be able to authenticate using XML-RPC.

Please note that you might need to adjust the URL, database name, username, and password in your code to match your Odoo setup.