Book Image

Natural Language Processing with TensorFlow

By : Motaz Saad, Thushan Ganegedara
Book Image

Natural Language Processing with TensorFlow

By: Motaz Saad, Thushan Ganegedara

Overview of this book

Natural language processing (NLP) supplies the majority of data available to deep learning applications, while TensorFlow is the most important deep learning framework currently available. Natural Language Processing with TensorFlow brings TensorFlow and NLP together to give you invaluable tools to work with the immense volume of unstructured data in today’s data streams, and apply these tools to specific NLP tasks. Thushan Ganegedara starts by giving you a grounding in NLP and TensorFlow basics. You'll then learn how to use Word2vec, including advanced extensions, to create word embeddings that turn sequences of words into vectors accessible to deep learning algorithms. Chapters on classical deep learning algorithms, like convolutional neural networks (CNN) and recurrent neural networks (RNN), demonstrate important NLP tasks as sentence classification and language generation. You will learn how to apply high-performance RNN models, like long short-term memory (LSTM) cells, to NLP tasks. You will also explore neural machine translation and implement a neural machine translator. After reading this book, you will gain an understanding of NLP and you'll have the skills to apply TensorFlow in deep learning NLP applications, and how to perform specific NLP tasks.
Table of Contents (16 chapters)
Natural Language Processing with TensorFlow
Contributors
Preface
Index

Using the TensorFlow RNN API


We will now examine how we can use the TensorFlow RNN API to make the code simpler. The TensorFlow RNN API contains a variety of RNN-related functions that help us to implement RNNs faster and easier. We will now see how the same example we discussed in the preceding sections can be implemented using the TensorFlow RNN API. However, to make things exciting, we will implement a deep LSTM network with three layers that we talked about in the comparisons. The full code for this is available in the lstm_word2vec_rnn_api.ipynb file in the Ch8 folder.

First, we will define the placeholders for holding inputs, labels, and corresponding embedding vectors for the inputs. We ignore the validation data related computations as we have already discussed them:

# Training Input data.
train_inputs, train_labels = [],[]
train_labels_ohe = []
# Defining unrolled training inputs
for ui in range(num_unrollings):
    train_inputs.append(tf.placeholder(tf.int32,
        shape=[batch_size...