I want to disable hash randomization for a particular Jupyter notebook. For a regular script, I do this via the python -R flag. How can I achieve the same thing when running jupter-notebook?
Of course I can achieve this particular goal via setting the PYTHONHASHSEED environmental variable but I would like to do it via the flag since it is more flexible.
It can be done by either editing the kernel.json file or registering new kernel with changed kernel.json file.
kernel.json contains argv attribute that essentially a command to run python.
{
"argv": [
"python",
"-m",
"ipykernel_launcher",
"-f",
"{connection_file}"
],
"display_name": "Python 3",
"language": "python"
}
kernel.json fileYou can find your kernel.json by running:
→ jupyter kernelspec list
Available kernels:
python3 /home/user/.local/share/virtualenvs/jupyter/share/jupyter/kernels/python3
You can edit it to your liking.
You can use the command from previous solution to find the existing kernel.json
then install the new kernel:
jupyter kernelspec install /home/user/.local/share/virtualenvs/jupyter/share/jupyter/kernels/python3 --name=python3_custom --user
Find your python3_custom location with
jupyter kernelspec list
and edit the kernel.json there
registering kernels in ipython/jupyter notebook - kernel.json
jupyter -notebookapply to the Python session that runs the server, not the kernel that processes the notebook code.