Is there a way to set PYTHONHASHSEED for a Jupyter Notebook session?

问题

I want to disable the randomization of Python's hash function. According to this thread (Unable to see or modify value of PYTHONHASHSEED through a module), setting PYTHONHASHSEED by setting os.environ['PYTHONHASHSEED'] at runtime does not work. How can I set PYTHONHASHSEED to a fixed value when I run Jupyter Notebook?

回答1:

You can try to modify the kernel.json and add the line "env": {"PYTHONHASHSEED":"0"}. The file is located in your python-folder or virtual environment at:

[venv|python-folder]/share/jupyter/kernels/python3/kernel.json

kernel.json:

{
     "argv": [
      "python",
      "-m",
      "ipykernel_launcher",
      "-f",
      "{connection_file}"
     ],
     "display_name": "Python 3",
     "language": "python",
     "env": {"PYTHONHASHSEED":"0"}
}

That solves the issue for me.

回答2:

Try to add

%env PYTHONHASHSEED=0

into your code. More information:

https://ipython.readthedocs.io/en/stable/interactive/magics.html?highlight=env#magic-env

来源：https://stackoverflow.com/questions/58067359/is-there-a-way-to-set-pythonhashseed-for-a-jupyter-notebook-session