LangChain example

LangChain example is a ready-to-run code snippet that demonstrates how to chain prompts, tools, or retrieval steps with the LangChain framework. A typical example lives in the project’s GitHub repo or docs and shows, in under 50 lines of Python, how to load an OpenAI model, wrap it in an LLMChain, split a PDF into chunks, store embeddings in Chroma, and answer questions through Retrieval-Augmented Generation (RAG). Each example highlights one concept—streaming tokens, agent tool-calling, memory persistence—so developers can copy, paste, and adapt it to their own stack without reading the full API surface. Variables such as API keys are injected from environment files, while comments explain parameters like temperature or chunk_overlap. By packaging best practices in bite-size form, LangChain examples cut onboarding time, prevent boilerplate errors, and serve as living tests that track breaking changes across releases.