Book Image

Flask Framework Cookbook - Second Edition

By : Shalabh Aggarwal
Book Image

Flask Framework Cookbook - Second Edition

By: Shalabh Aggarwal

Overview of this book

Flask, the lightweight Python web framework, is popular thanks to its powerful modular design that lets you build scalable web apps. With this recipe-based guide, you’ll explore modern solutions and best practices for Flask web development. Updated to the latest version of Flask and Python 3, this second edition of Flask Framework Cookbook moves away from some of the old and obsolete libraries and introduces new recipes on cutting-edge technologies. You’ll discover different ways of using Flask to create, deploy, and manage microservices. This Flask Python book starts by covering the different configurations that a Flask application can make use of, and then helps you work with templates and learn about the ORM and view layers. You’ll also be able to write an admin interface and get to grips with debugging and logging errors. Finally, you’ll learn a variety of deployment and post-deployment techniques for platforms such as Apache, Tornado, and Heroku. By the end of this book, you’ll have gained all the knowledge you need to confidently write Flask applications and scale them using standard industry practices.
Table of Contents (15 chapters)

Determining test coverage

In the previous recipes, test case writing was covered, but there is an important aspect to testing called coverage. Coverage refers to how much of our code has been covered by the tests. The higher the percentage of coverage, the better the test (although high coverage is not the only criterion for good tests). In this recipe, we will check the code coverage of our application.

Remember that 100% test coverage does not mean that the code is flawless. However, in any case, it is better than having no tests or lower coverage. Anything that is not tested is broken.

Getting ready

We will use a library called coverage for this recipe. The following is the installation command:

    $ pip3 install coverage...