Book Image

Hands-On Software Engineering with Python

By : Brian Allbee, Nimesh Verma
Book Image

Hands-On Software Engineering with Python

By: Brian Allbee, Nimesh Verma

Overview of this book

Software Engineering is about more than just writing code—it includes a host of soft skills that apply to almost any development effort, no matter what the language, development methodology, or scope of the project. Being a senior developer all but requires awareness of how those skills, along with their expected technical counterparts, mesh together through a project's life cycle. This book walks you through that discovery by going over the entire life cycle of a multi-tier system and its related software projects. You'll see what happens before any development takes place, and what impact the decisions and designs made at each step have on the development process. The development of the entire project, over the course of several iterations based on real-world Agile iterations, will be executed, sometimes starting from nothing, in one of the fastest growing languages in the world—Python. Application of practices in Python will be laid out, along with a number of Python-specific capabilities that are often overlooked. Finally, the book will implement a high-performance computing solution, from first principles through complete foundation.
Table of Contents (21 chapters)
Free Chapter
1
Programming versus Software Engineering

Polymorphism (and programming to an interface)

Polymorphism, in its simplest terms, is the ability for objects to be interchangeable in the code without breaking anything. In order to accomplish that, those objects must present common public interface members—the same accessible properties and methods—across the board. Ideally, those common interface members should be the only interface members as well, otherwise there is a risk of breaking the interchangeability of those objects. In a class-based structure, it's usually a good idea to have that interface defined as an individual abstraction—an ABC in Python, with or without concrete members. Consider the following collection of classes for making connections to and querying against various relational database backends:

Where:

  • BaseDatabaseConnector is an abstract class that requires a query method...