PythonAlchemist

Transforming complex Python concepts into simple, actionable knowledge. Master Python, AI/ML, and ace your coding interviews.

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AILLM

MCP Explained: The Universal Protocol for AI Tools

What is Model Context Protocol? Watch MCP client-server communication in action. Learn how this Anthropic standard connects LLMs to databases, APIs, and tools.

11 min read

AILLM

AI Agents Explained: From Chatbots to Autonomous Systems

How do AI agents work? Watch the Observe-Think-Act loop in action with our interactive visualizer. Understand ReAct, tool use, and autonomous decision-making.

10 min read

AILLM

RAG Explained: How AI Gets Real-Time Knowledge

What is RAG? Watch the retrieval-augmented generation pipeline step-by-step. See how LLMs access external knowledge through vector search and embeddings.

9 min read

System DesignDatabases

System Design Simulator: Build, Break, and Fix Databases

Interactive SimCity-style simulator where you build and break infrastructure. Add shards, replicas, and watch cascade failures teach you system design.

10 min read

AIMath

Tensors Explained: From Scalars to High-Dimensional Data

Understand tensors visually: scalar vs vector vs matrix vs tensor. Learn NumPy shape intuition with interactive examples and visualizations.

7 min read

LeetcodeRecursion

Why Recursion Burns Your CPU (And How Memoization Fixes It)

Visualize why naive recursion explodes exponentially. Watch memoization turn chaos into order with an interactive Fibonacci simulator.

9 min read

LeetcodeArrays

Sliding Window Algorithm: Why O(n²) is Just Bad Memory

Visualize why O(n²) is inefficient through a heat map simulator. Watch brute force burn CPU cycles while sliding window glides smoothly.

15 min read

Interactive Tools

Calculators and playgrounds for Python developers and ML engineers

Unix Timestamp Converter

Convert timestamps to dates

Current Unix TimeLive

—

Try it

Tokenizer Playground

See how LLMs read text

“Hello, GPT!”6 tokens

Hello,▁GPT!

BPE tokenization splits text into subwords

Try it

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Latest Posts

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PythonPandas

Polars vs Pandas in 2026: Is It Time to Switch?

Honest benchmarks, API comparison, and a decision framework for Polars vs Pandas. Interactive simulator shows 5-50x speed differences.

8 min read

AILLM

Build a ReAct AI Agent from Scratch in Python (Step-by-Step)

Build a ReAct (Reasoning + Acting) AI agent from scratch in pure Python. 10-step interactive tutorial with runnable code, output previews, and hands-on challenges.

10 min read

AILLM

Build AI Agents with the Claude Agent SDK in Python (2026 Tutorial)

Step-by-step tutorial to build AI agents using the Claude Agent SDK in Python. 10 hands-on steps covering tools, hooks, subagents, and MCP servers.

12 min read

AILLM

Build an MCP Server from Scratch in Python (2026 Tutorial)

Step-by-step tutorial to build an MCP server in Python. 10 hands-on steps covering tools, resources, prompts, and Claude Desktop integration.

12 min read

AILLM

MCP Explained: The Universal Protocol for AI Tools

What is Model Context Protocol? Watch MCP client-server communication in action. Learn how this Anthropic standard connects LLMs to databases, APIs, and tools.

11 min read

AILLM

AI Agents Explained: From Chatbots to Autonomous Systems

How do AI agents work? Watch the Observe-Think-Act loop in action with our interactive visualizer. Understand ReAct, tool use, and autonomous decision-making.

10 min read