Creating an API REST with Python, Flask and SQLite3

In this Python programming tutorial you will learn how to create a REST API using Flask, SQLite 3 (for data), and JSON for data communication.

In the end you will have an API that you can consume from any client that could be an Android application, a browser with JavaScript or even another server language.

I will show you how to create an API that communicates using JSON and saves the data in SQLite 3. The API will be created with Flask, and we will use the Python programming language to handle all the data.


Enable CORS in Flask app

In this post I will show you how to enable CORS (Cross Origin Resource sharing) so that you can make HTTP requests from a different domain than the one you use for your Flask application written in Python.

We will just add a kind of middleware to modify all the responses and add the headers that allow CORS in Flask.