python.langchain.com
Open in
urlscan Pro
76.76.21.241
Public Scan
Submitted URL: http://python.langchain.com:443/
Effective URL: https://python.langchain.com/
Submission: On November 23 via api from ID — Scanned from DE
Effective URL: https://python.langchain.com/
Submission: On November 23 via api from ID — Scanned from DE
Form analysis
0 forms found in the DOMText Content
Skip to main content 🦜️🔗 LangChainDocsUse casesIntegrationsGuidesAPI More * Templates * Community * Developer's guide * Dependents * Integrations Hub * Tutorials * Cookbooks * YouTube videos * Gallery Chat our docs Also by LangChain * LangSmith * LangServe GitHub * Templates GitHub * LangChain Hub * JS/TS Docs Search CTRLK * Get started * Introduction * Installation * Quickstart * Security * LangChain Expression Language * Interface * How to * Cookbook * LangChain Expression Language (LCEL) * Modules * Model I/O * Retrieval * Agents * More * LangServe * LangSmith * * Get started * Introduction On this page INTRODUCTION LangChain is a framework for developing applications powered by language models. It enables applications that: * Are context-aware: connect a language model to sources of context (prompt instructions, few shot examples, content to ground its response in, etc.) * Reason: rely on a language model to reason (about how to answer based on provided context, what actions to take, etc.) This framework consists of several parts. * LangChain Libraries: The Python and JavaScript libraries. Contains interfaces and integrations for a myriad of components, a basic run time for combining these components into chains and agents, and off-the-shelf implementations of chains and agents. * LangChain Templates: A collection of easily deployable reference architectures for a wide variety of tasks. * LangServe: A library for deploying LangChain chains as a REST API. * LangSmith: A developer platform that lets you debug, test, evaluate, and monitor chains built on any LLM framework and seamlessly integrates with LangChain. Together, these products simplify the entire application lifecycle: * Develop: Write your applications in LangChain/LangChain.js. Hit the ground running using Templates for reference. * Productionize: Use LangSmith to inspect, test and monitor your chains, so that you can constantly improve and deploy with confidence. * Deploy: Turn any chain into an API with LangServe. LANGCHAIN LIBRARIES The main value props of the LangChain packages are: 1. Components: composable tools and integrations for working with language models. Components are modular and easy-to-use, whether you are using the rest of the LangChain framework or not 2. Off-the-shelf chains: built-in assemblages of components for accomplishing higher-level tasks Off-the-shelf chains make it easy to get started. Components make it easy to customize existing chains and build new ones. GET STARTED Here’s how to install LangChain, set up your environment, and start building. We recommend following our Quickstart guide to familiarize yourself with the framework by building your first LangChain application. Read up on our Security best practices to make sure you're developing safely with LangChain. note These docs focus on the Python LangChain library. Head here for docs on the JavaScript LangChain library. LANGCHAIN EXPRESSION LANGUAGE (LCEL) LCEL is a declarative way to compose chains. LCEL was designed from day 1 to support putting prototypes in production, with no code changes, from the simplest “prompt + LLM” chain to the most complex chains. * Overview: LCEL and its benefits * Interface: The standard interface for LCEL objects * How-to: Key features of LCEL * Cookbook: Example code for accomplishing common tasks MODULES LangChain provides standard, extendable interfaces and integrations for the following modules: MODEL I/O Interface with language models RETRIEVAL Interface with application-specific data AGENTS Let models choose which tools to use given high-level directives EXAMPLES, ECOSYSTEM, AND RESOURCES USE CASES Walkthroughs and techniques for common end-to-end use cases, like: * Document question answering * Chatbots * Analyzing structured data * and much more... INTEGRATIONS LangChain is part of a rich ecosystem of tools that integrate with our framework and build on top of it. Check out our growing list of integrations. GUIDES Best practices for developing with LangChain. API REFERENCE Head to the reference section for full documentation of all classes and methods in the LangChain and LangChain Experimental Python packages. DEVELOPER'S GUIDE Check out the developer's guide for guidelines on contributing and help getting your dev environment set up. COMMUNITY Head to the Community navigator to find places to ask questions, share feedback, meet other developers, and dream about the future of LLM’s. Previous Get started Next Installation * LangChain Libraries * Get started * LangChain Expression Language (LCEL) * Modules * Examples, ecosystem, and resources * Use cases * Integrations * Guides * API reference * Developer's guide * Community Community * Discord * Twitter GitHub * Python * JS/TS More * Homepage * Blog Copyright © 2023 LangChain, Inc.