improve car_negotiation notebook by installing modules first

[Huge]

I would have a look to integrate https://docs.python.org/3/library/getpass.html instead of( or parallel to) dotenv for accessing the LLM API here, that should be easier to get started fast.

[spirali]

Hi, thank you for your PR.

I think that it is generally good idea; however I am afraid of the situation that someone is running a development version (installed through poetry as we recommend it) and then open this notebook in the git repository and rewrites its own environment by the stable version from pip.

I have to think a little bit how to solve this situation.

For the getpass, I am totally ok with it is it is used when dotenv fails to load

[Huge]

Yeah, that is a valid concern. After a few tries I have found
!python -c "import dotenv,langchain,interlab" || pip install python-dotenv langchain interlab would work-around quite well, although it is not very elegant/legible and on a second look would better be one such line for each module.
I can update the PR code with this and getpass as fallback, just not sure if today.-)

Colab link in meanwhile.