confusion_matrix https://oleksandrg.medium.com/how-to-create-a-confusion-matrix-with-the-test-result-in-your-training-model-802b1315d8ee
(visualize the history of network learning: accuracy, loss in graphs) https://oleksandrg.medium.com/how-to-visualize-the-history-of-network-learning-accuracy-loss-in-graphs-1678621194a5