Book Image

Python Machine Learning By Example - Third Edition

By : Yuxi (Hayden) Liu
Book Image

Python Machine Learning By Example - Third Edition

By: Yuxi (Hayden) Liu

Overview of this book

Python Machine Learning By Example, Third Edition serves as a comprehensive gateway into the world of machine learning (ML). With six new chapters, on topics including movie recommendation engine development with Naïve Bayes, recognizing faces with support vector machine, predicting stock prices with artificial neural networks, categorizing images of clothing with convolutional neural networks, predicting with sequences using recurring neural networks, and leveraging reinforcement learning for making decisions, the book has been considerably updated for the latest enterprise requirements. At the same time, this book provides actionable insights on the key fundamentals of ML with Python programming. Hayden applies his expertise to demonstrate implementations of algorithms in Python, both from scratch and with libraries. Each chapter walks through an industry-adopted application. With the help of realistic examples, you will gain an understanding of the mechanics of ML techniques in areas such as exploratory data analysis, feature engineering, classification, regression, clustering, and NLP. By the end of this ML Python book, you will have gained a broad picture of the ML ecosystem and will be well-versed in the best practices of applying ML techniques to solve problems.
Table of Contents (17 chapters)
15
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16
Index

Advancing language understanding with the Transformer model

The Transformer model was first proposed in Attention Is All You Need (https://arxiv.org/abs/1706.03762). It can effectively handle long-term dependencies, which are still challenging in LSTM. In this section, we will go through the Transformer's architecture and building blocks, as well as its most crucial part: the self-attention layer.

Exploring the Transformer's architecture

We'll start by looking at the high-level architecture of the Transformer model (image taken from Attention Is All You Need):

Figure 13.15: Transformer architecture

As you can see, the Transformer consists of two parts: the encoder (the big rectangle on the left-hand side) and the decoder (the big rectangle on the right-hand side). The encoder encrypts the input sequence. It has a multi-head attention layer (we will talk about this next) and a regular feedforward layer. On the other hand, the decoder...