I have been using Jupyter for some time now and it has worked just fine. I have Jupyter and Python installed via Homebrew. I am running on MacOS. Yesterday, I ran the command brew upgrade and now my Jupyter notebook is unable to find any of the installed python packages. I will use Numpy as the example. When inside of a Jupyter notebook, I try to do import numpy I get the message: ModuleNotFoundError: No module named 'numpy' If, however, I launch python in a terminal window, then I can import Numpy without issue. I first checked that the package was installed correctly by re-issuing the install command brew install numpy which outputs: Warning: numpy 1.18.4 is already installed and up-to-date To reinstall 1.18.4, run `brew reinstall numpy` I also ran pip install numpy and got: Requirement already satisfied: numpy in /usr/local/lib/python3.7/site-packages (1.18.4) Now, this is where I got confused because I expected the path to point to something like /usr/local/Cellar/, so I checked the path inside of the Jupyter notebook: import sys sys.path which outputs: ['/Users/kseuro/Dropbox/Dev/', '/usr/local/Cellar/jupyterlab/2.1.2/libexec/lib/python38.zip', '/usr/local/Cellar/jupyterlab/2.1.2/libexec/lib/python3.8', '/usr/local/Cellar/jupyterlab/2.1.2/libexec/lib/python3.8/lib-dynload', '/usr/local/opt/python@3.8/Frameworks/Python.framework/Versions/3.8/lib/python3.8', '', '/usr/local/Cellar/jupyterlab/2.1.2/libexec/lib/python3.8/site-packages', '/usr/local/Cellar/jupyterlab/2.1.2/libexec/lib/python3.8/site-packages/IPython/extensions', '/Users/kseuro/.ipython'] Ok, so Homebrew wants Jupyter to use Python3.8? So I tried brew switch python 3.8 and got: Error: python does not have a version "3.8" in the Cellar. python's installed versions: 3.7.7 I feel like I'm out of my depth now and need help figuring out what to do next. I don't want to start by just changing paths around. Suggestions? Thanks so much. Continue reading...
