Feb 13, 2009 · A design pattern is just a repeatable implementation of a higher level task. The reason why Python & design patterns don't work the same as other languages is because Python includes most of the basic patterns built in. This means that patterns that emerge in Python are likely to be higher level design patterns instead of the menial tasks for ...

According to this article, the best types of patterns for division between any kinds of components is Structural Patterns. from "Design Patterns: Elements of Reusable Object-Oriented Software" by The "Gang of Four": Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides. (I really want recommend you to read this awesome book) Structure Patterns:

Mar 3, 2009 · You may also wish to read this article (select the .pdf file), which discusses Design Patterns in dynamic object oriented languages (i.e. Python). To quote the page: To quote the page: This paper explores how the patterns from the "Gang of Four", or "GOF" book, as it is often called, appear when similar problems are addressed using a dynamic ...

Sep 4, 2010 · Was wondering the same thing as well, Python does not seem to support delegates as a built-in feature, and expanding with a lot of opensrc libs on this type of ground-level stuff is sometimes severe quality risk tbh as you add a dependency to 3rd party in more or less critical area, surely it depends entirely on the package and if its actively developed but still.

Apr 17, 2009 · There are two different patterns that are commonly called "builder": a) builder according to "Design Patterns: Elements of Reusable Object-Oriented Software" by Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides --- b) builder according to "Effective Java", by Joshua Bloch. "Consider a builder when faced with many constructor parameters."

May 23, 2017 · Design patterns can often be replaced with built-in language features. Your use case. You say "I wanted to have a more readable "means" to instantiating a class with many parameters.". In Java's case: [A] use case for the builder pattern is when the constructor of the object to be built must take very many parameters.

(The samples are intentionally incorrect by python in order to focus on the design, not syntax). Level C - abstraction-nirvana. It looks like this level should be mentioned in this post. Yes, there is such a pitfall that many good designers can confirm.

Nov 28, 2019 · What's the correct way to implement static immutable properties in Python? Minimal example: A program module 'Family' has a class Parent, defined below: class Parent(): def __init__(self, type): self.type = type The parent can be of either of the two string types: 'mother' or 'father'.

May 28, 2018 · So are there any 'design pattern' for such situations? UPD: I'd like to reformulate example from copy to deepcopy, which is more close to real case. So the idea is the same - we have to manage deepcoping of class A, which contains reference which should not bee deepcopied (i.e. link to container, in which object contains).

What are some better patterns for sharing a config object across an application and it's modules? I am thinking about having a 'config' module which basically creates a global config variable that can be set by the base app, then imported and accessed by other modules, but I am not sure if using globals like that is a bad practice for other ...