Error in the install process.

[msegel]

Hi, was walking thru the tutorial and came across this:

$ python3 -m pip install -r requirements.txt
Collecting yarl==1.4.2
  Using cached yarl-1.4.2.tar.gz (163 kB)
Collecting multidict==4.7.3
  Using cached multidict-4.7.3.tar.gz (50 kB)
Collecting graphviz>=0.14
  Using cached graphviz-0.16-py2.py3-none-any.whl (19 kB)
Collecting icecream>=1.2
  Using cached icecream-2.1.0-py2.py3-none-any.whl (8.0 kB)
Collecting jupyterlab>=3.0
  Using cached jupyterlab-3.0.12-py3-none-any.whl (8.3 MB)
Collecting matplotlib>=3.3
  Using cached matplotlib-3.3.4-cp36-cp36m-macosx_10_9_x86_64.whl (8.5 MB)
**ERROR: Could not find a version that satisfies the requirement numpy>=1.20
ERROR: No matching distribution found for numpy>=1.20**

[ceteri]

Many thanks @msegel , we'll revert to an earlier version of NumPy.
FWIW, I'm developing on both macOS and kfocus.org where numpy==1.20.1 is the current release -- although the NumPy website lists 1.20.0 as the most current.

I'll dig in and test.
Much appreciated!

[ceteri]

Due to security vulnerabilities, numpy has a later release which is urged.