ModuleNotFoundError：没有名为“numpy”的模块 - 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'

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

Answer 1

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.

Answer 2

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

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

Answer 3

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 4

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 5

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