[FIXED] Pandas and Jupyter not found after upgrading to Catalina

Issue

I just updated my macOS to Catalina and I can't run python or open a jupyter notebook from terminal anymore. As an example, I get error message "ImportError: No module named pandas" when running my python code, and I get

zsh: command not found: jupyter

when running

jupyter notebook

This issue has brought me to anaconda (I would love someone to explain me why. Does python need anaconda to be ran?). I have tried several suggestions from https://github.com/ContinuumIO/anaconda-issues/issues/10998, e.g. I have tried copying folder "anaconda3" from "Relocated items" folder to "Users//", then

export PATH=''/Users/<username>/anaconda3/bin:$PATH"

but I get either

dquote>

or

zsh: /Users//Applications/anaconda3/bin/conda: bad interpreter: /anaconda3/bin/python: no such file or directory

I then tried to reinstall Anaconda using the graphic installer (from https://www.anaconda.com/distribution/#macos) following advice from someone from the anaconda team (https://www.anaconda.com/how-to-restore-anaconda-after-macos-catalina-update/) (I changed installation location to a folder I created in /Users//) but I still get the same error messages when running python3 or jupyter notebook.

How can successfully run python and jupyter notebook with macOS Catalina?

Solution

I'm answering to my own question in case it can help others ;)

I found my answer here: https://medium.com/@singhaniatanay18/mac-os-catalina-update-zsh-instead-of-bash-d688f68f70b8

(see comments as well)

Answered By - Elsa