October 2018
Beginner to intermediate
466 pages
12h 2m
English
Content preview from Python 3 Object-Oriented Programming - Third Edition
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
Start your free trial
The template pattern
The template pattern is useful for removing duplicate code; it's intended to support the Don't Repeat Yourself principle we discussed in Chapter 5, When to Use Object-Oriented Programming. It is designed for situations where we have several different tasks to accomplish that have some, but not all, steps in common. The common steps are implemented in a base class, and the distinct steps are overridden in subclasses to provide custom behavior. In some ways, it's like a generalized strategy pattern, except similar sections of the algorithms are shared using a base class. Here it is in the UML format: