TIL you can add unavailable packages into ChatGPT environment (for example, if you want your output to use seaborn). You can use the custom GPT pip install to download these libraries that calls remote actions in the background.
From Simon Willson’s blog post:
If there's a package that you want to use you can grab the.whlfiles for it from PyPI, upload them to ChatGPT and it will install them into its own environment for the duration of that chat session.If a library has dependencies you have to upload those, too.