ModuleNotFoundError: No module named 'numpy' - Jupyter Notebook

Question

I'm facing weird issue in my Jupyter-notebook.

In my first cell:

import sys
!{sys.executable} -m pip install numpy
!{sys.executable} -m pip install Pillow

In the second cell:

import numpy as np
from PIL import Image

But it says : ModuleNotFoundError: No module named 'numpy'

ModuleNotFoundError: No module named 'numpy'

I have used this command to install Jupyter notebook :

sudo apt install python3-notebook jupyter jupyter-core python-ipykernel 

Additional information :

pip --version
pip 20.2.2 from /home/maifee/.local/lib/python3.7/site-packages/pip (python 3.7)
python --version
Python 3.7.5

• Suuuehgi: Gosh, did you start the jupyter server as root? Otherwise its ! pip install --user.
• Maifee Ul Asad: @Suuuehgi , thanks it worked...

Answer 1

Thanks to @suuuehgi. When Jupyter Notebook isn't opened as root:

import sys
!{sys.executable} -m pip install --user numpy

Answer 2

I've had occasional weird install issues with Jupyter Notebooks as well when I'm running a particular virtual environment. Generally, installing with pip directly in the notebook in this form:

!pip install numpy

fixes it. Let me know how it goes.

• Wayne: @Lynn_Leifker, this was already outdated information when you posted it. Best practice at that point was already %pip install numpy for when installing directly in the notebook using pip. The modern magic commands were added to insure the install occurs in the correct environment. See here for more about the magic install commands added a few years ago. The exclamation point alone doesn't do that. See the ...
• Wayne: <continued> second paragraph here for more about why the exclamation point is not as good and can lead to issues.

Answer 3

Restarting the kernal from the Jupyter Notebook solved this issue for me

Answer 4

I had a similar issue. Turns out I renamed an upstream path. And I hadn't deactivated my conda env first. When I deactivated the env.

conda deactivate

Then when I activated it again, everything was as it should have been.

conda activate sample

Now I am seeing other issues with jupyter themes... but its not impacting my numpy code. So, at least I fixed the "ModuleNotFoundError: No module named 'numpy'" error

Answer 5

I have the same problem. My numpy is installed, I am using the same folder as usual. If I try 'conda deactivate', I get the message: ValueError: The python kernel does not appear to be a conda environment. Please use %pip install instead. I added a print of the 'pip install numpy' result and the 'Module not found error' after

Answer 6

Here is a solution which worked for me:

lib_path="c:\\users\\user\\python_39\\lib\\site-packages\\"
MODULE_NAME = "module_to_import"
MODULE_PATH = lib_path+MODULE_NAME+"\\__init__.py"
import importlib
import sys
spec = importlib.util.spec_from_file_location(MODULE_NAME, MODULE_PATH)
module = importlib.util.module_from_spec(spec)
sys.modules[spec.name] = module 
spec.loader.exec_module(module)
import module_to_import

• sam: There is simpler approach for you @ stackoverflow.com/a/15109660/1686903