As we have seen throughout this book, Flask is designed to be as small as possible, while still giving you the flexibility and tools needed to create web applications. However, there are a lot of features that are common to many web applications, which means that many applications will require code that does the same task for each web application. To solve this problem, and avoid reinventing the wheel, people have created extensions for Flask, and we have seen many Flask extensions already throughout the book. This chapter will focus on some of the more useful Flask extensions that don't have enough content to separate them out into their own chapter, but will save you a lot of time and frustration.
In this chapter, you will learn how to do the following:
- Developing a debug toolbar, with great backend performance metrics
- Page cache using Redis or...
