You probably are in the wrong kernel or Python venv.

If you are not sure what is a venv and how to create them, refer to this documentation.

Make sure to always check here which venv you are in.

It is always recommended to use venv instead of using your Python in PATH.

Examples below show python installations in PATH (DO NOT USE THIS)

Create a new venv in the directory of your project then use that venve to run your notebook. documentation

It should look something like this: (venv)

In the example above, I have a data-proj-venv using Python 3.12.5 which I use when working on data science projects.

Trust me, learn about virtual environments, how they work, and why they are used. You will save yourself a lot of headaches in the future.

There are many similar issues on GitHub about this issue. Please try to uninstall and install the latest version of jupyter package. Also use pip install --upgrade ipykernel to upgrade ipykernel.

Regarding the time limit you said, the setting below is an option.

This is probably related to the VSCode itself rather than jupyter or python installation. On the actual VSCode GitHub repo, few issues are still open, apparently not fixed yet. What seems to be working though, is, to try killing all VSCode processes and trying again.

ps aux | grep -i vscode | less
pkill -f vscode

There should be a visual queue for pending cells, underlined in the screenshot below. Are you seeing that when running cells?

My guess is that you're interfering with python's built in 'random' module and something is accidentally importing your file instead of the proper module. That is why the solution is changing the name of your file.