Design Patterns in Python: Introduction

#What is a design pattern?

Design patterns are widely accepted solutions to recurring problems.

#Why do we need them?

Reusing these patterns saves our time to reinvent the wheel and encourage us to adopt the best practices.

#Facts about design patterns

• language-neutral
• dynamic
• intentionally incomplete for possible customization

#Three major design patterns

• Creational : Polymorphism
• Structural : Inheritance
• Behavioral : Methods and their signatures

Polymorphism:

1. relies on inheritance
2. Allows child classes to be instantiated and treated as the same type as its parent
3. Enables a parent class to be manifested into any of its child classes

A Pattern Context

• Participants: classes
• Quality attributes: Usability, modifiability, reliability, etc
• Forces: various factors or trade-offs to consider
• Consequences: side effects

#Pattern Language

• Name: should be meaningful and memorable
• Context
• Problem
• Solution: Structure: relationships among elements; Behavior: interactions
• Related patterns

#Links
Creational Patterns

Structural Patterns

[Behavioral Patterns]
(https://qiita.com/Violet_Bing/items/7d10b9c71dcc70aae430)

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To be continued...