Book Image

Metaprogramming with Python

By : Sulekha AloorRavi
Book Image

Metaprogramming with Python

By: Sulekha AloorRavi

Overview of this book

Effective and reusable code makes your application development process seamless and easily maintainable. With Python, you will have access to advanced metaprogramming features that you can use to build high-performing applications. The book starts by introducing you to the need and applications of metaprogramming, before navigating the fundamentals of object-oriented programming. Next, you will learn about simple decorators, work with metaclasses, and later focus on introspection and reflection. You’ll also delve into generics and typing before defining templates for algorithms. As you progress, you will understand your code using abstract syntax trees and explore method resolution order. This Python book also shows you how to create your own dynamic objects before structuring the objects through design patterns. Finally, you will learn simple code-generation techniques along with discovering best practices and eventually building your own applications. By the end of this learning journey, you’ll have acquired the skills and confidence you need to design and build reusable high-performing applications that can solve real-world problems.
Table of Contents (21 chapters)
1
Part 1: Fundamentals – Introduction to Object-Oriented Python and Metaprogramming
4
Part 2: Deep Dive – Building Blocks of Metaprogramming I
11
Part 3: Deep Dive – Building Blocks of Metaprogramming II

Chapter 11: Creating Dynamic Objects

In this chapter, we will look at the concept of dynamic objects in Python 3 and the process that can be followed to create any dynamic Python objects including classes, instances of classes, methods, and attributes.

As the name suggests, dynamic objects are objects that can be created at runtime or execution time rather than while coding, provided certain conditions are met.

Throughout this chapter, we will look at how to create classes, class instances, functions, methods, and attributes dynamically using our core example of ABC Megamart.

Why should we understand the creation of dynamic objects? In scenarios where we want to build applications that can generate code at runtime, the basic building blocks for Python code are the objects that are created at runtime. Dynamic creation of objects gives the flexibility and choice of creating an object only when it is required. Any object defined will occupy a certain amount of memory. When an...