You can use this page to email Sergio Adrian Martin about Shepley Algorithm implemented in Python.
About the Book
Shepley's method is one of several methods devised to invert matrices.
The advantage it has is that it is not recursive and does not require more than an array.
I have known it for about 40 years and although it is not my favorite method and I don't know who Shepley was, I recognize that it can be implemented in a variety of languages, and this time in Phyton.