Book Image

Python: Advanced Guide to Artificial Intelligence

By : Giuseppe Bonaccorso, Rajalingappaa Shanmugamani
Book Image

Python: Advanced Guide to Artificial Intelligence

By: Giuseppe Bonaccorso, Rajalingappaa Shanmugamani

Overview of this book

This Learning Path is your complete guide to quickly getting to grips with popular machine learning algorithms. You'll be introduced to the most widely used algorithms in supervised, unsupervised, and semi-supervised machine learning, and learn how to use them in the best possible manner. Ranging from Bayesian models to the MCMC algorithm to Hidden Markov models, this Learning Path will teach you how to extract features from your dataset and perform dimensionality reduction by making use of Python-based libraries. You'll bring the use of TensorFlow and Keras to build deep learning models, using concepts such as transfer learning, generative adversarial networks, and deep reinforcement learning. Next, you'll learn the advanced features of TensorFlow1.x, such as distributed TensorFlow with TF clusters, deploy production models with TensorFlow Serving. You'll implement different techniques related to object classification, object detection, image segmentation, and more. By the end of this Learning Path, you'll have obtained in-depth knowledge of TensorFlow, making you the go-to person for solving artificial intelligence problems This Learning Path includes content from the following Packt products: • Mastering Machine Learning Algorithms by Giuseppe Bonaccorso • Mastering TensorFlow 1.x by Armando Fandango • Deep Learning for Computer Vision by Rajalingappaa Shanmugamani
Table of Contents (31 chapters)
Title Page
About Packt
Contributors
Preface
19
Tensor Processing Units
Index

Chapter 18. Debugging TensorFlow Models

As we learned in this book, TensorFlow programs are used to build and train models that can be used for prediction in various kinds of tasks. When training the model, you build the computation graph, run the graph for training, and evaluate the graph for predictions. These tasks repeat until you are satisfied with the quality of the model, and then save the graph along with the learned parameters. In production, the graph is built or restored from a file and populated with the parameters.

Building deep learning models is a complex art and the TensorFlow API and its ecosystem are equally complex. When we build and train models in TensorFlow, sometimes we get different kinds of errors, or the models do not work as expected. As an example, how often do you see yourself getting stuck in one or more of the following situations:

 

  • Getting NaN in loss and metrics output
  • The loss or some other metric doesn't improve even after several iterations

In such situations...