Getting started with Flask 3
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Getting started with Flask 3

Here you continue your journey in developing web applications in Python with Flask

About the Book

This guide is intended to take your first steps with Flask using Python; with this, we are going to propose two things:

It is not a book that aims to know Flask 100%, or from zero to expert, since it would be too big an objective for the scope of this guide, otherwise, to know what it offers us and create the first web applications with Flask , know its extensions, create an API, use Jinja2 among others...

It is assumed that the reader has at least basic knowledge of Python development.

This book has a practical approach, knowing the key aspects of the technology and moving into practice, gradually implementing small features of an application that has real scope.

To follow this book you need to have a computer with Windows, Linux or MacOS.

The book is currently in development.

This book consists of 11 chapters, with which we will learn in detail the most important and basic features of Flask:

Chapter 1: In this chapter we are going to present the software necessary to create projects in Flask, what happens from Python, to preparing the environment, the editor that we will use, VSC and a web browser.

Chapter 2: We present some essential commands to develop in Flask, we will prepare the environment and give an introduction to the framework, we will create a structure for the project in Flask and we will get a basic understanding of the routing for the controllers.

Chapter 3: In this chapter we will see how to use the template engine par excellence in Flask, which is Jinja, with which we can return responses in HTML format and customize the page with embedded Python code with which we can customize using blocks, filters, macros, among others.

Chapter 4: In this chapter we will see how to connect an application in Flask to a relational database such as MySQL using SQLAlchemy; We will see how to configure a database, connection through the models, generation of automatic migrations based on the models and basic CRUD operations to manipulate the database.

Chapter 5: In this chapter we will install the Flask Migrate extension to configure a migration system for the project and in this way be able to customize the tables and have a robust schema to be able to make changes to the database in a practical and scalable way, in addition to be able to create a trace with these changes.

Chapter 6: In this chapter we will use the Form WTF extension to create forms, apply validations, initial values and later dump this data into the database, these forms are classes with the aforementioned attributes and in this way we can apply the same schema for server and client side data manipulation.

Chapter 7: In this chapter we will see how to use one-to-one, one-to-many and many-to-many relationships in Flask with SQLAlchemy.

Chapter 8: In this chapter we will see how to use flash messages useful to inform the user about the operations carried out.

Chapter 9: In this chapter we will use Flask Login to create an authentication system and protect drivers.

Chapter 10: In this chapter we will see how to implement a Rest Api using the Restful Flash package, generate access tokens and make test connections.

Chapter 11: In this chapter we will see how to implement unit tests.

This book is a translation into English of Primeros pasos con Flask which was originally written in English.

About the Author


Andrés Cruz Yoris, Licenciado en Computación, con más de 10 años de experiencia en el desarrollo de aplicaciones web en general; trabajo con PHP, Python y tecnologías del lado del cliente como HTML, JavaScript, CSS, Vue entre otras; y del lado del servidor como Laravel, Flask, Django y Codeigniter. También desarrollo con Android Studio, xCode y Flutter para la creación de aplicaciones nativas para Android e IOS.

Pongo a tú disposición parte de mi aprendizaje, reflejado en cada una de las palabras que componen mis libros sobre el desarrollo de aplicaciones en general.

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