Book Image

Hands-On RESTful Python Web Services - Second Edition

By : Gaston C. Hillar
1 (1)
Book Image

Hands-On RESTful Python Web Services - Second Edition

1 (1)
By: Gaston C. Hillar

Overview of this book

Python is the language of choice for millions of developers worldwide that builds great web services in RESTful architecture. This second edition of Hands-On RESTful Python Web Services will cover the best tools you can use to build engaging web services. This book shows you how to develop RESTful APIs using the most popular Python frameworks and all the necessary stacks with Python, combined with related libraries and tools. You’ll learn to incorporate all new features of Python 3.7, Flask 1.0.2, Django 2.1, Tornado 5.1, and also a new framework, Pyramid. As you advance through the chapters, you will get to grips with each of these frameworks to build various web services, and be shown use cases and best practices covering when to use a particular framework. You’ll then successfully develop RESTful APIs with all frameworks and understand how each framework processes HTTP requests and routes URLs. You’ll also discover best practices for validation, serialization, and deserialization. In the concluding chapters, you will take advantage of specific features available in certain frameworks such as integrated ORMs, built-in authorization and authentication, and work with asynchronous code. At the end of each framework, you will write tests for RESTful APIs and improve code coverage. By the end of the book, you will have gained a deep understanding of the stacks needed to build RESTful web services.
Table of Contents (19 chapters)
Title Page
Dedication
About Packt
Contributors
Preface
Index

Creating the model


Now, we will create a simple NotificationModel class that we will use to represent notifications. Remember that we won't be persisting the model in any database or file, and therefore, in this case, our class will just provide the required attributes and no mapping information. Create a new models.py file in the service folder. The following lines show the code that creates a NotificationModel class in the service/models.py file. The code file for the sample is included in the restful_python_2_01_01 folder, in the Flask01/service/models.py file:

class NotificationModel: 
    def __init__(self, message, ttl, creation_date, notification_category): 
        # We will automatically generate the new id 
        self.id = 0 
        self.message = message 
        self.ttl = ttl 
        self.creation_date = creation_date 
        self.notification_category = notification_category 
        self.displayed_times = 0 
        self.displayed_once = False 

The NotificationModel class just declares a constructor, that is, the __init__ method. This method receives many arguments and uses them to initialize the attributes with the same names: message, ttl, creation_date, and notification_category. The id attribute is set to 0, displayed_times is set to 0, and displayed_once is set to False. We will automatically increment the identifier for each new notification generated with API calls.