Book Image

Python Web Development with Sanic

By : Adam Hopkins
Book Image

Python Web Development with Sanic

By: Adam Hopkins

Overview of this book

Today’s developers need something more powerful and customizable when it comes to web app development. They require effective tools to build something unique to meet their specific needs, and not simply glue a bunch of things together built by others. This is where Sanic comes into the picture. Built to be unopinionated and scalable, Sanic is a next-generation Python framework and server tuned for high performance. This Sanic guide starts by helping you understand Sanic’s purpose, significance, and use cases. You’ll learn how to spot different issues when building web applications, and how to choose, create, and adapt the right solution to meet your requirements. As you progress, you’ll understand how to use listeners, middleware, and background tasks to customize your application. The book will also take you through real-world examples, so you will walk away with practical knowledge and not just code snippets. By the end of this web development book, you’ll have gained the knowledge you need to design, build, and deploy high-performance, scalable, and maintainable web applications with the Sanic framework.
Table of Contents (16 chapters)
1
Part 1:Getting Started with Sanic
4
Part 2:Hands-On Sanic
11
Part 3:Putting It All together

Advanced path parameters

In the last section, we learned the basics of extracting information from a dynamic URL path to something we can code with. This is truly a fundamental feature of all web frameworks. It is also extremely common among many frameworks to allow you to specify what that path parameter should be. We learned that /messages/<message_id:int> would match /messages/123 but not /messages/abc. We also learned about the convenience that Sanic provides in converting the match path segment to an integer.

But what about more complex types? Or what if we need to modify the matched value before using it in our application? In this section, we will explore a couple of helpful patterns to achieve these goals.

Custom parameter matching

Out of the box, Sanic provides eight path parameter types that can be matched:

  • str: Matches any valid string
  • slug: Matches standard path slugs
  • int: Matches any integer
  • float: Matches any number
  • alpha: Matches...