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So ... python version 3.9.1 did a Pip install matplotlib and ran smoothly, despite questions with previous installation errors. It turns out that :
import numpy as np
import math
import matplotlib as npl
You’re making the mistake of not finding the module, even though Pip worked. Tb happens for Django not to find the modules...
What could it be? Thank you
You must be installing at the project level and not at the global level, that is, libraries should be available for another project of yours and not the current one.
– Evilmaax
After installing the programming language, take a look to see if the libraries you want to use are properly on your PC
– Davi Vieira
ah ... this is a good tip and I did a Pip install inside my activated venv
– user6855041