Setup:

Within main.py, you will find a piece of code that looks like this:

import openai

# put in your key here
openai.api_key = ""

You will need to put in your OpenAI key here. You can access this here after creating your account. The next thing you will need to do is install OpenAI's SDK. All you need to do is run this pip command:

pip install openai

After that, you are now able to use ChatGPT from your command line.