How to Build a Simple LCEL Chain in LangChain with Python
Learn how to build a simple LangChain LCEL chain with Python using ChatPromptTemplate, ChatOpenAI, and StrOutputParser in a beginner-friendly tutorial.
Python
194 posts
Streamlit + DuckDB: Build Interactive Data Apps That Read and Write to a DuckDB Database
Build a simple Streamlit task tracker that reads from DuckDB, writes new rows, updates task status, and validates the result with SQL.
When to Use replace, append, or merge in a dlt Pipeline
Learn when to use replace, append, or merge in a dlt pipeline with practical DuckDB examples and beginner-friendly explanations.
How to Build a RAG Chatbot with LangChain, Python, and FAISS
Build a beginner-friendly RAG chatbot with LangChain, Python, FAISS, and OpenAI by loading local text, creating embeddings, retrieving context, and answering questions from your own data.
LangChain Document Loaders Tutorial for Beginners: Load PDFs, Text Files, and Web Pages
Learn how LangChain document loaders turn text files, PDFs, and web pages into Document objects for RAG, summarization, and search workflows.
LangChain Memory Explained for Beginners: Add Chat History to Your AI App
Learn how LangChain memory and chat history help AI apps keep context across messages, answer follow-up questions, and support more natural conversations.
LangChain Output Parsers Explained for Beginners: Get Structured JSON from LLM Responses
Learn how LangChain output parsers help turn LLM responses into structured JSON that your Python applications can validate, reuse, and process.
LangChain Prompt Templates Explained for Beginners: Build Reusable AI Prompts
Learn how LangChain prompt templates work and build reusable AI prompts with Python, ChatPromptTemplate, variables, and a chat model.
How to Load JSON Data into DuckDB using dlt
Learn how to load a local JSON file into DuckDB with dlt, inspect the result with SQL, and understand a simple data pipeline pattern.