Python how to slice a tensor variable? How to create a tensor? How to add totals to a pivot table

Machine learning and deep learning is the most important breakthrough in the 21st century. Companies around the world are in a race to automate replacing 85 million jobs in the next five years.

I show some basic tensor slicing techniques. I show how to create a tensor variable.

I show how to add totals for columns and rows on a pandas pivot table