setting up vitrual environment for deep learning on ubuntu

Question

I am trying to setup virtual environment for every deep learning project that i do locally on my laptop so that every package like numpy, matplotlib, opencv-python etc. i installed will be installed in that environment only not on my laptop globally. Now, the problem is i activate the virtual environment using source ENV_NAME/bin/activate and when i import libraries like cv2 in my notebook after installing cv2 in that environment setup, it says " ModuleNotFoundError: No module named 'cv2'" please see the screenshots below. but when i deactivate that environment and install cv2 on my laptop globally and then try to import cv2, it works fine. Could someone please tell my why?

Answer 1

You need to restart the kernel in Jupyter Notebook for the new modules to show up.

Answer 2

Not sure if you already found the solution, but I stumbled upon this blog and it answers most questions of the type: I installed package X and now I can't import it in the notebook. Help!

You can install the package directly in the jupyter notebook using:

# Install a pip package in the current Jupyter kernel
import sys
!{sys.executable} -m pip install opencv-python

if using pip.

OR

# Install a conda package in the current Jupyter kernel
import sys
!conda install --yes --prefix {sys.prefix} opencv-python

if using conda.

Head over to link for more details.