Python – Page 25 – ITFROMZERO

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Building a RAG Application with LangChain and Python — A Step-by-Step Guide for Beginners

By IT From Zero February 28, 2026

A step-by-step guide to building a RAG (Retrieval-Augmented Generation) application with LangChain and Python: from loading documents and creating a vector store with Chroma, to building a complete chain that lets your LLM answer questions based on your own data.

Claude API with Python: A Practical Guide to Building AI Applications from A to Z

By IT From Zero February 28, 2026

A hands-on guide to using Claude API (Anthropic) with Python: from your first API call in 5 minutes to streaming, prompt caching, retry logic, and cost control tips from real-world experience.

Building a Custom MCP Server with Python: Connecting AI to Your Systems

By IT From Zero February 27, 2026

MCP (Model Context Protocol) is an open protocol that lets AI models connect to external tools and data sources in a standardized way. This guide walks through building a real-world MCP Server in Python — from installing the SDK and creating secure tools to connecting with Claude Desktop, complete with a full file manager example.

Firecrawl: Web Data Collection for AI Applications When Traditional Scrapers Fall Short

By IT From Zero February 27, 2026

When BeautifulSoup returned "Please enable JavaScript" at 2 AM the night before a deadline, Firecrawl was what saved the entire pipeline. A practical guide to using Firecrawl to collect clean web data for AI and RAG pipelines with Python.