pip install on Jupyter kerner venv (virtual environment) is not updated

Question

I'm creating the Jupyter kernel within the virtual environment but the pkg in Juypter notebook is still missing after pip install

Answer 1

First create your virtual env using this post and activate it!

Create the kernel using:

ipython kernel install --name=gen-py3

Now the kernel details would be in:

/usr/local/share/jupyter/kernels/gen-py3

note: you can cd to this folder and open the file kernel.json and see the details of your env, for example mine is:

 "argv": [
  "/usr/local/opt/python/bin/python3.7",
  "-m",
  "ipykernel_launcher",
  "-f",
  "{connection_file}"
 ],
 "display_name": "gen-py3",
 "language": "python"

Which means is taken out of the global Python env b/c of this "/usr/local/opt/python/bin/python3.7" In some cases when you're running in your venv it's constantly taken out of you global env and not your venv. Not try to run in your venv:

virtualenv -p python3 venv
source <env_name>/bin/activate ; in our case venv
pip install ipython
pip install ipykernel

and make sure you run

ipython kernel install --name=venv-test

from your venv ipython. for example if your virtual env is venv and the location is

~/venv

run:

/Users/nathanielkohn/venv/bin/ipython kernel install --name=venv-test

Now open the kernel.json file, find the location by running:

jupyter kernelspec list

And your kernel.json file is with the venv:

{
 "argv": [
  "/Users/<your_user_name>/venv/bin/python",
  "-m",
  "ipykernel_launcher",
  "-f",
  "{connection_file}"
 ],
 "display_name": "venv-test",
 "language": "python",
 "metadata": {
  "debugger": true
 }