Design Patterns Repository

Welcome to the Design Patterns Repository! This repository serves as a comprehensive guide and reference for understanding and implementing various software design patterns.

Table of Contents

1. Introduction
2. What are Design Patterns?
3. Categories of Design Patterns
   • Creational Patterns
   • Structural Patterns
   • Behavioral Patterns
4. How to Use This Repository
5. Contributing
6. License

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Introduction

Design patterns are proven solutions to common software design problems. They provide a template for writing code that is reusable, maintainable, and scalable. This repository contains examples and explanations of various design patterns to help developers improve their coding practices.

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What are Design Patterns?

Design patterns are typical solutions to recurring problems in software design. They are not finished designs but templates that can be adapted to solve specific problems in different contexts.

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Categories of Design Patterns

Creational Patterns

Creational patterns deal with object creation mechanisms, trying to create objects in a manner suitable to the situation. Examples include:

• Factory Method

  Exercise	Code
  Basic Example	main.py
  Message Queue	message_queue.py
  Document Exporter	document_exporter.py
  Data Exporter	data_exporter.py

• Abstract Factory

  Exercise	Code
  Basic Example	main.py
  Cloud Provisioning	cloud_provisioning.py
  Data Processing	data_processing.py

• Builder

  Exercise	Code
  Basic Example	main.py
  Query Builder	query_builder.py
  API Request Builder	api_request_builder.py
  Server Config Builder	server_configuration_builder.py

• Prototype

  Exercise	Code
  Basic Example	main.py
  Template BluePrint	template_blueprint.py
  Service Configuration	service_configuration.py
  Lazy Configuration	lazy_configuration.py

• Singleton

  Exercise	Code
  Basic Example	main.py
  Log Bus	log_bus.py
  Connection Pool	connection_pool.py
  Application Bootstrap	application_bootstrap.py

Structural Patterns

Structural patterns focus on the composition of classes and objects. Examples include:

• Adapter

  Exercise	Code
  Basic Example	main.py
  Data Processing	data_processing.py

• Bridge

  Exercise	Code
  Basic Example	main.py
  Payment Gateway	payment_gateway.py
  Notification Sender	notification_sender.py
  Database Provider	database_provider.py

• Composite

  Exercise	Code
  Basic Example	main.py
  Math Expression	mathematical_expression.py
  Task Management	task_management.py

• Decorator

  Exercise	Code
  Basic Example	main.py
  Service Decorator	service_decorator.py
  Request Client	request_client.py
  Payment Processor	payment_processor.py
  Logging System	logging_system.py

• Facade

  Exercise	Code
  Basic Example	main.py
  System Deployment	system_deployment.py
  Data Store	data_store.py
  API Gateway	api_gateway.py

• Flyweight

  Exercise	Code
  Basic Example	main.py
  Particle System	partical_system.py
  Cache Manager	cache_manager.py

• Proxy

  Exercise	Code
  Basic Example	main.py
  Fibonacci Calculator	fibonacci_calculator.py
  Dynamic Proxies	dynamic_proxies.py
  Security Proxy	security_proxy.py

Behavioral Patterns

Behavioral patterns are concerned with communication between objects. Examples include:

• Chain of Responsibility

  Exercise	Code
  Basic Example	main.py
  Payment Gateway	payment_gateway.py
  Chain Builder	chain_builder.py
  Request Validator	request_validator.py
  Content Processor	content_processor.py

• Command

  Exercise	Code
  Basic Example	main.py
  Smart Home	smart_home.py
  Scheduler	scheduler.py
  Command Bus	command_bus.py
  Database Transaction	database_transaction.py

• Iterator

  Exercise	Code
  Basic Example	main.py
  Book Shelf	book_shelf.py
  Binary Tree	binary_tree.py
  Log Analyzer	log_analyzer.py
  API Paginated	api_paginated.py

• Mediator

  Exercise	Code
  Basic Example	main.py
  Chat Room	chat_room.py
  Smart Home	smart_home.py
  Service Orchestrator	service_orchestrator.py

• Memento

  Exercise	Code
  Basic Example	main.py
  Text Buffer	text_buffer.py
  Config Manager	config_manager.py
  Transaction Manager	transaction_manager.py

• Observer

  Exercise	Code
  Basic Example	main.py
  Event Bus	event_bus.py
  Domain Event	domain_event.py
  Stock Alert	stock_alert.py
  Service Monitor	service_monitor.py

• State

  Exercise	Code
  Basic Example	main.py
  Order Workflow	order_workflow.py
  Document Workflow	document_workflow.py

• Strategy

  Exercise	Code
  Basic Example	main.py
  Shipping Cost	shipping_cost.py
  Pricing Engine	pricing_engine.py

• Template Method

  Exercise	Code
  Basic Example	main.py
  Data Pipeline	data_pipeline.py
  Order Processor	order_processor.py

• Visitor

  Exercise	Code
  Basic Example	main.py
  Tax Calculator	tax_calculator.py
  Document Export	document_export.py
  AST Calculator	ast_calculator.py

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How to Use This Repository

1. Clone the repository:

   git clone https://github.com/duthaho/python-design-patterns.git

2. Navigate to the pattern of interest in the directory structure.
3. Read the explanation and review the code examples provided.
4. Experiment with the code to understand how the pattern works.

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Contributing

Contributions are welcome! If you have improvements or new patterns to add, please follow these steps:

1. Fork the repository.
2. Create a new branch for your feature or fix.
3. Commit your changes and push them to your fork.
4. Submit a pull request with a detailed description of your changes.

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License

This repository is licensed under the MIT License. Feel free to use the code and examples in your own projects.

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Happy coding!