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Object-Oriented Programming (OOP) in Python is a superpower when you learn to use the language’s data model and protocols to your advantage. This tutorial is a comprehensive, end-to-end guide—from the very basics of classes and objects to advanced features like descriptors, protocols, metaclasses, and performance optimizations. The goal: to make you more capable than 99% of your peers by the end. What makes Python’s OOP special isn’t just syntax—it’s the “data model” that lets your objects integrate naturally with the language (iteration, context managers, arithmetic, indexing, etc.). We’ll cover essentials, best practices, pitfalls, and real-world patterns, with concrete code examples throughout. ...

Introduction If you want to learn algorithmic crypto trading without risking real money, paper trading is the safest, fastest way to start. In this guide, you’ll build a minimal, efficient paper trading loop in Python that runs on your laptop, uses real-time market data, and simulates orders with fees and slippage—no exchange account or API keys required. We’ll use public market data (via CCXT) and a small “paper broker” to track positions, PnL, and trades. ...

Introduction Hash maps are fundamental data structures widely used in programming and system design for their efficient key-value storage and retrieval capabilities. In Python, the built-in dictionary (dict) serves as a highly optimized hash map. However, a linked hash map is a specialized variant that maintains the order of insertion while retaining the fast lookup of a hash map. This blog post explores the concept of linked hash maps in Python, their relevance to system design, and useful resources for deeper understanding. ...

Introduction Skip lists are a beautiful idea: a simple, probabilistic alternative to balanced trees that delivers expected O(log n) search, insert, and delete, yet is easier to implement and friendlier to concurrency. They’ve quietly powered critical systems for decades—from leaderboards and rate limiters to LSM-tree memtables and Redis sorted sets. In this post, you’ll go from beginner to hero: Understand the intuition, guarantees, and design of skip lists Implement a production-quality skip list in Python Learn how skip lists show up in system design Get practical guidance on performance, determinism, and trade-offs Explore advanced variants and when to use them If you’re building systems that need fast ordered access, range queries, or rank-based operations, skip lists belong in your toolkit. ...

Batching API requests is a proven technique to improve throughput, reduce overhead, and tame the N+1 request problem across web and mobile apps. But batching is more than “combine a few calls into one.” To do it well you need to consider protocol details, error semantics, idempotency, observability, rate limiting, and more. This article explains how batching works, when to use it, and how to design and implement robust batch endpoints with real code examples. ...