Set Python Guesthouse as “Starred⭐“ to receive the latest news first Many beginners prefer to use global variables because they are easier to understand than passing parameters around functions. Indeed, using global variables is convenient in many scenarios. However, as the codebase grows and multiple files are involved, global variables can become quite chaotic. You … Read more
During the process of learning Python programming, acquiring some interesting facts or understanding the underlying principles can help you gain a deeper understanding of the language. Python Metaclasses: Metaclasses are the “classes” that create classes. Although metaclasses are not commonly used in everyday programming, understanding how they work can assist you in creating custom class … Read more
1. Generators & Coroutines — Less Code, Faster Execution Generators are like “lazy workers” — they only do enough work to push the task forward. 📌 Background Scenario Suppose we are building a real-time log processing system: • Logs are continuously generated (e.g., access logs, transaction logs). • We need to: • Read logs one … Read more
Mastering the Creator’s Rules of the Class World 1. Why are Metaclasses the Ultimate Magic in Python? In the 2025 Python Developer Survey, the usage rate of metaclasses was only 12%, but in the framework development field, it reached as high as 89%. This ultimate tool for controlling class creation enables frameworks like Django ORM … Read more
C++ Classes and Objects: Definitions, Creation, and Access Modifiers In object-oriented programming, classes and objects are two very important concepts. C++, as a programming language that supports object-oriented programming, organizes and manages code through classes and objects. In this article, we will explore classes and objects in C++, including how to define, create, and access … Read more
Hello everyone, today we are going to talk about the “static star” in C++ — <span>static</span>. This keyword seems simple at first glance, just six letters, but it plays multiple important roles in C++, involving different semantics for variables, functions, and classes. If you still regard <span>static</span> merely as a synonym for “static variable”, then … Read more
In Linux systems, Access Control Lists (ACL) are a powerful tool for managing file and directory permissions with finer granularity. Traditional permission management uses a combination of user, group, and other with r (read), w (write), and x (execute). However, as system complexity increases, this method no longer meets the needs for complex permission control. … Read more
Introduction: The Magic of Metaclass Programming Among Python’s advanced features, metaclass programming is undoubtedly one of the most powerful and mysterious concepts. It allows us to control the class creation process, providing unprecedented flexibility for object-oriented programming. This article will delve into the core concepts of Python metaclass programming, particularly focusing on the roles of … Read more