Book Image

Python Programming Blueprints

By : Daniel Furtado, Marcus Pennington
Book Image

Python Programming Blueprints

By: Daniel Furtado, Marcus Pennington

Overview of this book

Python is a very powerful, high-level, object-oriented programming language. It's known for its simplicity and huge community support. Python Programming Blueprints will help you build useful, real-world applications using Python. In this book, we will cover some of the most common tasks that Python developers face on a daily basis, including performance optimization and making web applications more secure. We will familiarize ourselves with the associated software stack and master asynchronous features in Python. We will build a weather application using command-line parsing. We will then move on to create a Spotify remote control where we'll use OAuth and the Spotify Web API. The next project will cover reactive extensions by teaching you how to cast votes on Twitter the Python way. We will also focus on web development by using the famous Django framework to create an online game store. We will then create a web-based messenger using the new Nameko microservice framework. We will cover topics like authenticating users and, storing messages in Redis. By the end of the book, you will have gained hands-on experience in coding with Python.
Table of Contents (17 chapters)
Title Page
Copyright and Credits
Dedication
Contributors
Packt Upsell
Preface
Index

Displaying messages in the web browser


Earlier, we added the WebServer microservice to handle HTTP requests; we will now amend this so that when a user lands on the root home page, they are shown all of the messages in our data store.

One way to do this is to use a templating engine such as Jinja2.

Adding a Jinja2 Dependency Provider

Jinja2 is a templating engine for Python that is extremely similar to the templating engine in Django. For those who are familiar with Django, you should feel right at home using it.

Before we start, you should amend your base.in file to include jinja2, re-compile your requirements and install them. Alternatively, simply run pip install jinja2.

Creating the template renderer

When generating a simple HTML template in Jinja2, the following three steps are required:

  • Creating a template environment
  • Specifying the template
  • Rendering the template

With these three steps, it's important to identify which parts are never subject (or at least extremely unlikely) to change while...