Book Image

Natural Language Processing with Flair

By : Tadej Magajna
Book Image

Natural Language Processing with Flair

By: Tadej Magajna

Overview of this book

Flair is an easy-to-understand natural language processing (NLP) framework designed to facilitate training and distribution of state-of-the-art NLP models for named entity recognition, part-of-speech tagging, and text classification. Flair is also a text embedding library for combining different types of embeddings, such as document embeddings, Transformer embeddings, and the proposed Flair embeddings. Natural Language Processing with Flair takes a hands-on approach to explaining and solving real-world NLP problems. You'll begin by installing Flair and learning about the basic NLP concepts and terminology. You will explore Flair's extensive features, such as sequence tagging, text classification, and word embeddings, through practical exercises. As you advance, you will train your own sequence labeling and text classification models and learn how to use hyperparameter tuning in order to choose the right training parameters. You will learn about the idea behind one-shot and few-shot learning through a novel text classification technique TARS. Finally, you will solve several real-world NLP problems through hands-on exercises, as well as learn how to deploy Flair models to production. By the end of this Flair book, you'll have developed a thorough understanding of typical NLP problems and you’ll be able to solve them with Flair.
Table of Contents (15 chapters)
1
Part 1: Understanding and Solving NLP with Flair
6
Part 2: Deep Dive into Flair – Training Custom Models
11
Part 3: Real-World Applications with Flair

Implementing the Flair trading bot

The trading strategy consists of three main logically independent components:

  • News article acquisition component
  • NER component
  • Sentiment analysis component

The first component, news acquisition, is a very domain-specific piece of code. The data source used largely depends on the types of companies we're interested in trading. There's no universal source of news that will work well for all stock. Therefore, we plan to move the news acquisition part out of our strategy and design it so that the news text is merely provided as input to our bot.

Our trading strategy components will often access the same mutual variables such as the name of the company we are interested in. Therefore, it makes sense to use an object-oriented design and implement our strategy as part of a Python class. We will call our trading strategy class FlairTrader. The class's constructor method will receive the company name (the name of the...