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Utilizing Metaprogramming in Python
Metaprogramming is not often something that we need to use, but when we do it is there. If avoidable, it is probably recommended to not rely on metaprogramming because it is hard for other programmers to understand. In this hands-on lab, we'll be building a metaclass to make it easy to create database models. By the time you've finished this lab, you'll have demonstrated a good grasp of how to create a metaclass and a common way to use metaprogramming.
Lab Info
Table of Contents
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Challenge
Create ModelClass Metaclass and Add a Dynamic Initializer
Create a subclass of the
typeclass and implement the__new__method. From here, create and attach an initializer based on the annotations on the class. -
Challenge
Build and Attach get_by_xxx Class Methods for Each Attribute on the Model
For each of the annotations on the class build a
get_by_xxxmethod and attack it as a class method.
Real skill practice before real-world application
Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.
Learn by doing
Engage hands-on with the tools and technologies you’re learning. You pick the skill, we provide the credentials and environment.
Follow your guide
All labs have detailed instructions and objectives, guiding you through the learning process and ensuring you understand every step.
Turn time into mastery
On average, you retain 75% more of your learning if you take time to practice. Hands-on labs set you up for success to make those skills stick.