I believe the following line needs more attention to be compatible with Windows considering windows does not have SIGKILL: https://github.com/pathbird/poetry-kernel/blob/main/poetry_kernel/main.py#L39

Hey, cool project!

I got the following error, not sure how informative it is for you. Happy to dig into logs etc. I'm using a Gitpod workspace with a public github repo too, so could potentially offer a completely reproducible clean environment.

Failed to start the Kernel. 
FileNotFoundError: [Errno 2] No such file or directory: 'poetry'. 

This now loops through parent directories to check for pyproject.toml to allow for kernel execution when running notebooks in sub directories. I used the same code from poetry itself to ensure compatibility

in regard to issue #3

removed signal.SIGTERM from forward_signals, as well as two others as they could not be used by signal.signal (ValueError: invalid signal value)

from https://docs.python.org/3/library/signal.html signal.CTRL_C_EVENT The signal corresponding to the Ctrl+C keystroke event. This signal can only be used with os.kill()

same for signal.CTRL_BREAK_EVENT

This now loops through parent directories to check for pyproject.toml to allow for kernel execution when running notebooks in sub directories. I used the same code as used poetry itself to ensure compatibility

If a poetry pyproject.toml is used to create the environment for the Jupyter lab (adding poetry-kernel as a dependency), then no matter in which working directory the jupyter server is started, any notebook that is opened with the "poetry" kernel will have the Jupyter environment, not the environment of the notebook's project.

Minimal example: https://github.com/drakesiardxy/poetry-kernel-bug To replicate: Create the jupyer-base env and the kernel_a env separately, then start the jupyter server with the first environment and attempt to run kernel_a.ipynb using the "Poetry" kernel. pandas will be missing, because the notebook will have been launched with the environment of the server, not the environment belonging to the notebook's project.

Hi!

We have a multi-user JupyterHub instance and we would like to use your library. So far we have only been able to see the poetry-kernel button in the kernel selection screen by installing poetry kernel at the user level (if we install poetry kernel from the user that launches JupyterHub, the root user, the button does not show). But the problem that we have is that when we press the poetry button and create a new notebook in a folder with a poetry project (and ipykernel installed), the kernel is never connected so no code can be executed. The generated logs are the following:

Apr 26 15:30:26 labs-ubuntu-20-04 python3[446728]: [I 2022-04-26 15:30:26.298 SingleUserLabApp restarter:66] AsyncIOLoopKernelRestarter: restarting kernel (2/5), new random ports
Apr 26 15:30:26 labs-ubuntu-20-04 python3[1028846]: Traceback (most recent call last):
Apr 26 15:30:26 labs-ubuntu-20-04 python3[1028846]:   File "/usr/lib/python3.8/runpy.py", line 194, in _run_module_as_main
Apr 26 15:30:26 labs-ubuntu-20-04 python3[1028846]:     return _run_code(code, main_globals, None,
Apr 26 15:30:26 labs-ubuntu-20-04 python3[1028846]:   File "/usr/lib/python3.8/runpy.py", line 87, in _run_code
Apr 26 15:30:26 labs-ubuntu-20-04 python3[1028846]:     exec(code, run_globals)
Apr 26 15:30:26 labs-ubuntu-20-04 python3[1028846]:   File "/home/marta/.local/lib/python3.8/site-packages/poetry_kernel/__main__.py", line 68, in <module>
Apr 26 15:30:26 labs-ubuntu-20-04 python3[1028846]:     main()
Apr 26 15:30:26 labs-ubuntu-20-04 python3[1028846]:   File "/home/marta/.local/lib/python3.8/site-packages/poetry_kernel/__main__.py", line 37, in main
Apr 26 15:30:26 labs-ubuntu-20-04 python3[1028846]:     proc = subprocess.Popen(cmd)
Apr 26 15:30:26 labs-ubuntu-20-04 python3[1028846]:   File "/usr/lib/python3.8/subprocess.py", line 858, in __init__
Apr 26 15:30:26 labs-ubuntu-20-04 python3[1028846]:     self._execute_child(args, executable, preexec_fn, close_fds,
Apr 26 15:30:26 labs-ubuntu-20-04 python3[1028846]:   File "/usr/lib/python3.8/subprocess.py", line 1704, in _execute_child
Apr 26 15:30:26 labs-ubuntu-20-04 python3[1028846]:     raise child_exception_type(errno_num, err_msg, err_filename)
Apr 26 15:30:26 labs-ubuntu-20-04 python3[1028846]: FileNotFoundError: [Errno 2] No such file or directory: 'poetry'

This looks like poetry is not being found by the library although it is indeed installed both at the root and user level. Is there a way to solve this? Or is this case out of the scope of the library for now?