This was mentioned at today's telecon, a new Baumgarte and Shapiro book
"Numerical Relativity: Starting from Scratch" is claimed to be more pedagogical
and with lots of Python scripts / notebooks.  Comes out 8 April 2021.
https://www.amazon.com/Numerical-Relativity-Starting-Thomas-Baumgarte/dp/1108928250/[…]=&hvlocint=&hvlocphy=9013186&hvtargid=pla-1065495297108&psc=1

fyi, bille .g.

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William Gabella
Research Assistant Professor
Department of Physics and Astronomy
Nashville, TN USA
(o) 615-343-2713