February 2016
Beginner to intermediate
164 pages
3h 25m
English
book
Learning Python Design Patterns - Second Edition - Second Edition
by Chetan Giridhar, Gennadiy Zlobin
Content preview from Learning Python Design Patterns - Second Edition - Second EditionBecome 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,
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The principle of least knowledge
As you have learned in the initial parts of the chapter, the Façade provides a unified system that makes subsystems easy to use. It also decouples the client from the subsystem of components. The design principle that is employed behind the Façade pattern is the principle of least knowledge.
The principle of least knowledge guides us to reduce the interactions between objects to just a few friends that are close enough to you. In real terms, it means the following:
- When designing a system, for every object created, one should look at the number of classes that it interacts with and the way in which the interaction happens.
- Following the principle, make sure that we avoid situations where there are many classes created ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.