[FIXED] Difficulty running jupyter notebook on Python2

Issue

I have both Python 2 (2.7.14) and Python 3 (3.6.4) installed on my computer
(Linux rajarshi-x550cc 4.15.10-300.fc27.x86_64 #1 SMP Thu Mar 15 17:13:04 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux)

I have also installed Jupyter Notebook. When I run a new kernel on Jupyter Notebook, whether I choose to run the Python-2 kernel or the Python-3 kernel, only the Python-3 Kernel is run. I have checked this with print(sys.version).

I got several nice answers here on Stackoverflow, but none of them worked for me. I created a JSON file in the Jupyter library in /usr/share/jupyter/kernels/python2 with the following code:

{
 "display_name": "Python 2", 
 "language": "python", 
 "argv": [
  "python", 
  "-m", 
  "ipykernel_launcher", 
  "-f", 
  "{connection_file}"
 ]
}

but there was no observable difference.

I then uninstalled Jupyter from Python 3 as follows: python3 -m pip uninstall jupyter but Jupyter is still there, and it still recognizes only Python 3.

I am honestly at my wit's end. Should I simply remove Python 3 altogether?

Solution

You can use ipykernel to register different versions of python in the same notebook environment.

See the following documentation for more information https://ipython.readthedocs.io/en/latest/install/kernel_install.html#kernels-for-python-2-and-3

Answered By - ScottMcC