Book Image

Hands-On Python Natural Language Processing

By : Aman Kedia, Mayank Rasu
4 (1)
Book Image

Hands-On Python Natural Language Processing

4 (1)
By: Aman Kedia, Mayank Rasu

Overview of this book

Natural Language Processing (NLP) is the subfield in computational linguistics that enables computers to understand, process, and analyze text. This book caters to the unmet demand for hands-on training of NLP concepts and provides exposure to real-world applications along with a solid theoretical grounding. This book starts by introducing you to the field of NLP and its applications, along with the modern Python libraries that you'll use to build your NLP-powered apps. With the help of practical examples, you’ll learn how to build reasonably sophisticated NLP applications, and cover various methodologies and challenges in deploying NLP applications in the real world. You'll cover key NLP tasks such as text classification, semantic embedding, sentiment analysis, machine translation, and developing a chatbot using machine learning and deep learning techniques. The book will also help you discover how machine learning techniques play a vital role in making your linguistic apps smart. Every chapter is accompanied by examples of real-world applications to help you build impressive NLP applications of your own. By the end of this NLP book, you’ll be able to work with language data, use machine learning to identify patterns in text, and get acquainted with the advancements in NLP.
Table of Contents (16 chapters)
1
Section 1: Introduction
4
Section 2: Natural Language Representation and Mathematics
9
Section 3: NLP and Learning

Training a Word2vec model

Now that we know how the pretrained Word2vec model can be leveraged and we have looked at and understood the Word2vec model architecture, let's try to actually train a Word2vec model. We can create a custom implementation for this; however, for the sake of this exercise, we will leverage the functionalities provided by the gensim library.

The gensim library provides a convenient interface for building a Word2vec model. We will start by building a very simple model using the fewest possible parameters and then we will build on it.

Building a basic Word2vec model

Let's build a basic Word2vec model by executing the following steps:

  1. We will start by importing the Word2vec module from gensim, define a few sentences as our data, and then build a model using the following code:
from gensim.models import Word2Vec
sentences = [["I", "am", "trying", "to", "understand", "Natural",
&quot...