ModuleNotFoundError: No module named 'lxml'

Question

I have a DevOps script that upgrade the build / version numbers in my project. It uses lxml library to parse xml type files. It was working great but all of a sudden, I got the error : ModuleNotFoundError: No module named 'lxml'. I already tried updating lxml, and uninstall / reinstall but none of those worked. I also tried it with python 2.7 but got the exact same error.

I am using python3 and pip3 with aliases as following :

❯ which python
python: aliased to /usr/local/bin/python3
❯ which pip
pip: aliased to /usr/local/bin/pip3

macos Catalina 10.15.6 (19G2021)

lxml version : 4.5.2

python 3.8.5

pip 20.2.3

What was the last thing you did before you got the error, did you change something? — BeeFriedman, Oct 08 '20 at 17:10
No that's why it's weird, I used it in the exact same version as it is now. — BenjaminB, Oct 08 '20 at 17:10
Was this the first time you used it today, or were you coding and it just happened in the middle? — BeeFriedman, Oct 08 '20 at 17:13
Yes it was the first time for today. I wanted to use the script to fully finish my feature but I guess it will wait for now.... — BenjaminB, Oct 08 '20 at 17:15
Check this out, it shows you how to reset the path, it is sometimes messed up. https://stackoverflow.com/questions/27008222/importerror-no-module-named-lxml-even-though-lxml-is-installed — BeeFriedman, Oct 08 '20 at 17:29
If you run a `pip3 uninstall lxml` it will show you where it's installed and ask for confirmation. Is it installed in the right place? Meaning a path included in the result of `python3 -c 'import sys; print(sys.path)'`. — Georges Martin, Oct 09 '20 at 17:01

score 0 · Accepted Answer · answered Oct 12 '20 at 10:07

OK I managed to understand what is going on thanks to @Georges Martin. The issue was that pip was installing into /usr/local/lib/python3.9/site-packages but my python3 was actually pointing to /usr/local/Cellar/python@3.8/3.8.5/bin/python3.8 and not python3.9.

ModuleNotFoundError: No module named 'lxml'

1 Answers1