Book Image

Deep Learning for Natural Language Processing

By : Karthiek Reddy Bokka, Shubhangi Hora, Tanuj Jain, Monicah Wambugu
Book Image

Deep Learning for Natural Language Processing

By: Karthiek Reddy Bokka, Shubhangi Hora, Tanuj Jain, Monicah Wambugu

Overview of this book

Applying deep learning approaches to various NLP tasks can take your computational algorithms to a completely new level in terms of speed and accuracy. Deep Learning for Natural Language Processing starts by highlighting the basic building blocks of the natural language processing domain. The book goes on to introduce the problems that you can solve using state-of-the-art neural network models. After this, delving into the various neural network architectures and their specific areas of application will help you to understand how to select the best model to suit your needs. As you advance through this deep learning book, you’ll study convolutional, recurrent, and recursive neural networks, in addition to covering long short-term memory networks (LSTM). Understanding these networks will help you to implement their models using Keras. In later chapters, you will be able to develop a trigger word detection application using NLP techniques such as attention model and beam search. By the end of this book, you will not only have sound knowledge of natural language processing, but also be able to select the best text preprocessing and neural network models to solve a number of NLP issues.
Table of Contents (11 chapters)

Flask

In this section, we will use the Flask microserver framework provided by Python to make a web application that provides predictions. We will get a RESTful API that we can query to get our results. Before commencing, we need to install Flask (use pip):

  1. Let's begin by importing the packages:

    import re

    import pickle

    import numpy as np

    from flask import Flask, request, jsonify

    from keras.models import load_model

    from keras.preprocessing.sequence import pad_sequences

  2. Now, let's write a function that loads the trained model and tokenizer:

    def load_variables():

    global model, tokenizer

    model = load_model('trained_model.h5')

    model._make_predict_function() #https://github.com/keras-team/keras/issues/6462

    with open('trained_tokenizer.pkl', 'rb') as f:

    tokenizer = pickle.load(f)

    The make_predict_function() is a hack that allows using keras models with Flask.

  3. Now, we'll define preprocessing functions similar to the training code...