How can I teach the grid to recognize handwritten numbers if I can't find the files I need on the Internet?

Question

Neural networks

As is clear from the question, I want to train the grid to distinguish between handwritten numbers in a 28x28 field. I wrote according to the book, there were links to the github with the necessary files, but there are no more pages at such addresses on our mortal earth. So, I found the necessary data, but, as they say in the book, the author will work there with more compressed and, in principle, with a different file format. Tobish, I downloaded in two wild formats - IDX3-UBYTE and IDX1-UBYTE, which are not normally read by any editor that I have, while the author uses CSV, which is easily opened in IPhyton. I'm doing this for the first time.

Answer 1

yann.lecun.com/exdb/mnist the format of these IDX.. formats is described.
And here are examples of working with MNIST in TensorFLow

Answer 2

The very first link in Google says what these formats are, why they are and how to open them.
You to the freelance exchange.