python-backend-systems

This repository contains a collection of Python backend projects and exercises, focusing on practical concepts and real-world skills for backend development. Each subdirectory covers a specific topic, ranging from generators and decorators to database operations, asynchronous programming, and comprehensive testing.

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Project Structure

• python-generators-0x00/

  • Learn how to use Python generators for efficient data streaming and batch processing, especially with databases.
  • Includes scripts for streaming users, batch processing, lazy pagination, and seeding a MySQL database.

• python-decorators-0x01/

  • Explore Python decorators for logging, database connection management, transactions, retries, and caching.
  • Practice writing reusable and composable decorator functions for backend tasks.

• python-context-async-perations-0x02/

  • Dive into context managers and asynchronous operations in Python.
  • Work with database connections, execute queries asynchronously, and handle concurrent operations.

• 0x03-Unittests_and_integration_tests/

  • Master unit and integration testing using unittest, parameterized, and mock.
  • This project provides a client for the GitHub API and includes extensive tests to demonstrate best practices for mocking and test parameterization. You'll learn to write robust tests for utility functions (access_nested_map), API clients (GithubOrgClient), and memoized properties.

• Django-Middleware-0x03/ & messaging_app/

  • These directories contain a complete messaging API built with the Django REST Framework.
  • The project features JWT-based authentication, conversation and message management (ConversationViewSet, MessageViewSet), and custom middleware for logging API requests (RequestLoggingMiddleware). It serves as a practical example of building a full-fledged RESTful service.

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Key Concepts Covered

• Python generators and iterators
• Decorators and higher-order functions
• Database operations (MySQL, SQLite)
• Context managers and async programming
• Unit testing, integration testing, and mocking with unittest and mock
• API development with Django REST Framework
• Authentication with JWT
• Custom Django middleware
• Code style compliance (PEP8/pycodestyle)

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How to Use

1. Clone the repository:

   git clone https://github.com/yourusername/alx-backend-python.git
   cd alx-backend-python

2. Explore a project: Navigate into any project directory to see the code and run the examples. Each project is self-contained. For example, to run the tests for the unit testing project:

   cd 0x03-Unittests_and_integration_tests/
   python -m unittest test_utils.py