Making use of ctx
Before we begin with the tool belt, there is one more concept that we must become familiar with. It is fairly ubiquitous in Sanic, and you will see it in a lot of places. I am talking about: ctx. What is it?
It stands for context. These ctx objects can be found in several places, and it is impractical to build a professional-grade Sanic web application without making good use of them. What they enable is the passing of state from one location in your application to another. They exist for your own usage as a developer, and you should feel free to use them however you wish. That is to say that the ctx objects are yours to add information to without worrying about name collisions or otherwise impacting the operation of Sanic.
The most common example that comes to mind is your database connection object. You create it once, but you want to have access to it in many places. How does this work? Have a look at the following code snippet:
@app.before_server_start...