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

What is Nameko?


Nameko is an open-source framework used for building microservices in Python. Using Nameko, you can create microservices that communicate with each other using RPC (Remote Procedure Calls) via AMQP (Advanced Message Queueing Protocol).

RPCs

RPC stands for Remote Procedure Call, and I'll briefly explain this with a short example based on a cinema booking system. Within this cinema booking system, there are many microservices, but we will focus on the booking service, which is responsible for managing bookings, and the email service, which is responsible for sending emails. The booking service and email service both exist on different machines and both are unaware of where the other one is. When making a new booking, the booking service needs to send an email confirmation to the user, so it makes a Remote Procedure Call to the email service, which could look something like this:

def new_booking(self, user_id, film, time): 
    ... 
    self.email_service.send_confirmation(user_id...