Book Image

Building Data Science Applications with FastAPI

By : François Voron
5 (1)
Book Image

Building Data Science Applications with FastAPI

5 (1)
By: François Voron

Overview of this book

FastAPI is a web framework for building APIs with Python 3.6 and its later versions based on standard Python-type hints. With this book, you’ll be able to create fast and reliable data science API backends using practical examples. This book starts with the basics of the FastAPI framework and associated modern Python programming language concepts. You'll be taken through all the aspects of the framework, including its powerful dependency injection system and how you can use it to communicate with databases, implement authentication and integrate machine learning models. Later, you’ll cover best practices relating to testing and deployment to run a high-quality and robust application. You’ll also be introduced to the extensive ecosystem of Python data science packages. As you progress, you’ll learn how to build data science applications in Python using FastAPI. The book also demonstrates how to develop fast and efficient machine learning prediction backends and test them to achieve the best performance. Finally, you’ll see how to implement a real-time face detection system using WebSockets and a web browser as a client. By the end of this FastAPI book, you’ll have not only learned how to implement Python in data science projects but also how to maintain and design them to meet high programming standards with the help of FastAPI.
Table of Contents (19 chapters)
1
Section 1: Introduction to Python and FastAPI
7
Section 2: Build and Deploy a Complete Web Backend with FastAPI
13
Section 3: Build a Data Science API with Python and FastAPI

Basics of scikit-learn

Now, let's focus on scikit-learn, an essential ML library for Python. It implements dozens of classic ML models, but also numerous tools to help you while training them, such as pre-processing methods and cross-validation.

The first thing you must do to get started is install it in your Python environment:

$ pip install scikit-learn

We can now start our scikit-learn journey!

Training models and predicting

In scikit-learn, ML models and algorithms are called estimators. Each is a Python class that implements the same methods. In particular, we have fit, which is used to train a model, and predict, which is used to run the trained model on new data.

To try this, we'll load a sample dataset. scikit-learn comes with a few toy datasets that are very useful for performing experiments. You can find out more about them in the official documentation: https://scikit-learn.org/stable/datasets.html.

Here, we'll use the digits dataset,...