Book Image

Software Architecture with Python

By : Anand Balachandran Pillai
Book Image

Software Architecture with Python

By: Anand Balachandran Pillai

Overview of this book

This book starts by explaining how Python fits into an application's architecture. As you move along, you will get to grips with architecturally significant demands and how to determine them. Later, you’ll gain a complete understanding of the different architectural quality requirements for building a product that satisfies business needs, such as maintainability/reusability, testability, scalability, performance, usability, and security. You will also use various techniques such as incorporating DevOps, continuous integration, and more to make your application robust. You will discover when and when not to use object orientation in your applications, and design scalable applications. The focus is on building the business logic based on the business process documentation, and understanding which frameworks to use and when to use them. The book also covers some important patterns that should be taken into account while solving design problems, as well as those in relatively new domains such as the Cloud. By the end of this book, you will have understood the ins and outs of Python so that you can make critical design decisions that not just live up to but also surpassyour clients’ expectations.
Table of Contents (18 chapters)
Software Architecture with Python
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
Index

Patterns in Python – Behavioral


Behavioral patterns are the last stage in the complexity and functionality of patterns. They also come last chronologically in object life cycle in a system since objects are first created, then built into larger structures, before they interact with each other.

These patterns encapsulate models of communication and interaction between objects. These patterns allow us to describe complex workflows that may be difficult to follow at runtime.

Typically, Behavioral patterns favor object composition over inheritance as usually, the interacting objects in a system would be from separate class hierarchies.

In this brief discussion, we will look at the following patterns: Iterator, Observer, and State.

The Iterator pattern

An iterator provides a way to access elements of a container object sequentially without exposing the underlying object itself. In other words, an iterator is a proxy that provides a single method of iterating over a container object.

Iterators are everywhere...