Architecture Patterns with Python

Preface

You may be wondering who we are and why we wrote this book.

At the end of Harry’s last book, Test-Driven Development with Python (O’Reilly), he found himself asking a bunch of questions about architecture, such as, What’s the best way of structuring your application so that it’s easy to test? More specifically, so that your core business logic is covered by unit tests, and so that you minimize the number of integration and end-to-end tests you need? He made vague references to “Hexagonal Architecture” and “Ports and Adapters” and “Functional Core, Imperative Shell,” but if he was honest, he’d have to admit that these weren’t things he really understood or had done in practice.

And then he was lucky enough to run into Bob, who has the answers to all these questions.

Bob ended up a software architect because nobody else on his team was doing it. He turned out to be pretty bad at it, but he was lucky enough to run into Ian Cooper, who taught him new ways of writing and thinking about code.

Managing Complexity, Solving Business Problems

We both work for MADE.com, a European ecommerce company that sells furniture online; there, we apply the techniques in this book to build distributed systems that model real-world business problems. Our example domain is the first system Bob built for MADE, and this book is an attempt to write down all the stuff we have to teach new programmers when they join one of our teams.

MADE.com operates a global supply chain of freight partners and ...