Book Image

Neural Network Projects with Python

By : James Loy
Book Image

Neural Network Projects with Python

By: James Loy

Overview of this book

Neural networks are at the core of recent AI advances, providing some of the best resolutions to many real-world problems, including image recognition, medical diagnosis, text analysis, and more. This book goes through some basic neural network and deep learning concepts, as well as some popular libraries in Python for implementing them. It contains practical demonstrations of neural networks in domains such as fare prediction, image classification, sentiment analysis, and more. In each case, the book provides a problem statement, the specific neural network architecture required to tackle that problem, the reasoning behind the algorithm used, and the associated Python code to implement the solution from scratch. In the process, you will gain hands-on experience with using popular Python libraries such as Keras to build and train your own neural networks from scratch. By the end of this book, you will have mastered the different neural network architectures and created cutting-edge AI projects in Python that will immediately strengthen your machine learning portfolio.
Table of Contents (10 chapters)

Model building in Keras

We're finally ready to start building our model in Keras. As a reminder, the model architecture that we're going to use is shown in the previous section.

Importing data

First, let's import the dataset. The IMDb movie reviews dataset is already provided in Keras, so we can import it directly:

from keras.datasets import imdb

The imdb class has a load_data main function, which takes in the following important argument:

  • num_words: This is defined as the maximum number of unique words to be loaded. Only the n most common unique words (as they appear in the dataset) will be loaded. If n is small, the training time will be faster at the expense of accuracy. Let's set num_words = 10000...