Install langchain.
- Install langchain Step 3: Installing llama-cpp-python. LangSmith is framework-agnostic — it can be used with or without LangChain's open source frameworks langchain and langgraph. (e. Follow the step-by-step guide below to seamlessly set up LangChain on your system. 进入虚拟环境后，用文本编辑器把以下代码编成文件，如：langchain_1. Verifying Installation. Install the Python SDK with pip install neo4j langchain-neo4j VectorStore The Neo4j vector index is used as a vectorstore, whether for semantic search or example selection. Installation To install LangChain run: 同时安装客户端和服务器依赖。或者使用 pip install "langserve[client]" 安装客户端代码，使用 pip install "langserve[server]" 安装服务器代码。 LangChain CLI. Chat models . The code lives in an integration package called: langchain_postgres. See the dependency graph, installation commands, and source options for each package. But leveraging their full potential requires integrating them into downstream applications. Follow the steps to install git, pyenv, Poetry, Visual Studio Code, Jupyter Extension and LangChain package. Next, use the DefaultAzureCredential class to get a token from AAD by calling get_token as shown below. How to install LangChain packages; How to add examples to the prompt for query analysis; How to use few shot examples; How to run custom functions; How to use output parsers to parse an LLM response into structured format; How to handle cases where no queries are generated; How to route between sub-chains; How to return structured data from a model pip install langchain-docling Copy PIP instructions. Finally, set the OPENAI_API_KEY environment variable to the token value. In this quickstart we'll show you how to build a simple LLM application with LangChain. 安装完成后，你可以使用以下命令来验证是否成功安装了Langchain： ``` langchain--version ``` 如果显示了Langchain的版本号，则说明安装成功。 Feb 19, 2025 · Setup Jupyter Notebook . To install the LangChain CLI from langchain. Credentials To use Google Generative AI models, you must have an API key. It is stable to install the llama-cpp-python library by compiling from the source. txt file, for loading the text contents of any web page, or even for loading a transcript of a YouTube video. Mar 31, 2025 · Install the integration package: pip install langchain-groq Request an API key and set it as an environment variable. Learn how to set up a development environment for LangChain, a framework for building AI applications, on Windows. LangChain is an open-source Python framework that makes working with large language models simple and intuitive. If you're not sure which to choose, learn more about installing packages. The package supports the asyncpg and psycogp3 drivers. ChatVertexAI class exposes models such as gemini-pro and chat-bison. Released: Mar 7, 2025 CLI for interacting with LangChain. Intro to LangChain LangChain is a popular framework that allow users to quickly build apps and pipelines around L arge L anguage M odels. @langchain/openai, @langchain/anthropic, etc. Download and install Ollama onto the available supported platforms (including Windows Subsystem for Linux) Fetch available LLM model via ollama pull <name-of-model> View a list of available models via the model library To access OpenAI models you'll need to create an OpenAI account, get an API key, and install the langchain-openai integration package. To use, you should have Google Cloud project with APIs enabled, and configured credentials. LangChain CLI对于使用LangChain模板和其他LangServe项目非常有用。使用以下命令安装： Feb 12, 2023 · pip install langchain[all] ただし、全部載せの場合は古いバージョンのLangChainがインストールされます。試した時点では、LangChain 0. To install this package run one of the following: conda install conda-forge::langchain. @langchain/community: Third party integrations. Google. LangChain. Chroma is licensed under Apache 2. This package contains the ChatGoogleGenerativeAI class, which is the recommended way to interface with the Google Gemini series of models. The langchain-postgres package implementations of core LangChain abstractions using Postgres. And you should configure credentials by setting the following environment variables: SupabaseVectorStore. LangChain CLI对于使用LangChain模板和其他LangServe项目非常有用。使用以下命令安装： Basic Python knowledge will be helpful to install and run LangChain, but it’s not required. runnables import RunnableParallel, RunnablePassthrough from langchain_openai import OpenAIEmbeddings Facebook AI Similarity Search (FAISS) is a library for efficient similarity search and clustering of dense vectors. To use it run `pip install -U langchain-openai` and import as `from langchain_openai import OpenAI`. This application will translate text from English into another language. Install LangChain on Windows | LangChain | PythonGitHub: https://github. document_loaders import PyPDFLoader loader = PyPDFLoader(r"D:Datasets207416. If you want to integrate LangChain into an application, some Python skills will be needed. Sep 18, 2024 · The installation of LangChain is straightforward through the Python Package Index (PyPI). Credentials Head to https://platform. The Tavily search tool accepts the following arguments during invocation: query (required): A natural language search query; The following arguments can also be set during invocation : include_images, search_depth, time_range, include_domains, exclude_domains, include_images This page covers all integrations between Anthropic models and LangChain. # Step-by-Step LangChain Install Guide # Downloading LangChain Apr 25, 2023 · To install the langchain Python package, you can pip install it. Initialize 3 days ago · langchain-google-vertexai. This package contains the LangChain integrations for Google Cloud generative models. The Chroma class exposes the connection to the Chroma vector store. Requirements. 📕 Releases & Versioning To use Faiss vector stores, you’ll need to install the @langchain/community integration package and the faiss-node package as a peer dependency. 9 is required to run the code in this notebook. LangChain 是使用 TypeScript 编写的，可以在以下环境中使用: Node. 1+, you may also try disabling "modern installation" (poetry config installer. These are applications that can answer questions about specific source information. agents import load_tools from langchain. 01 はじめに 02 プロンプトエンジニアとは？ 03 プロンプトエンジニアの必須スキル5選 04 プロンプトデザイン入門【質問テクニック10選】 05 LangChainの概要と使い方 06 LangChainのインストール方法【Python】 07 LangChainのインストール方法【JavaScript・TypeScript】 08 LCEL（LangChain Expression Language）の概要と Nov 16, 2023 · Large language models (LLMs) like GPT-3 and Codex have demonstrated revolutionary capabilities in understanding and generating human language. /state_of Nov 9, 2024 · 在终端或命令提示符中输入以下命令： ``` npm install -g langchain-cli ``` 这将下载并安装Langchain的命令行工具。 4. Head to https://atlas. NIM supports models across domains like chat, embedding, and re-ranking models from the community as well as NVIDIA. % pip install -qU langchain-text-splitters Feb 26, 2025 · langchain-google-community. warn_deprecated(And run the chain, to ask the question: chain from langchain_community. pip install langchain Verify the installation: After the installation completes, you can verify it by running: pip show langchain This command will display the installed version and other details about the LangChain package. Source Distribution One of the most powerful applications enabled by LLMs is sophisticated question-answering (Q&A) chatbots. Installation. js (ESM 和 CommonJS) - 18. Credentials Head to DeepSeek's API Key page to sign up to DeepSeek and generate an API key. pip show langchain 如果仍然有问题。 Dec 27, 2023 · pip install langchain[llms] By adding the [llms] extra, pip will install additional packages needed to work with large language models like GPT-3, Codex, and others. This is where LangChain comes in. Project description Aug 17, 2024 · pip install langchain-openai Using Conda: conda install -c conda-forge langchain-openai. I use python-dotenv because I manage my environment variables in a . Then, set OPENAI_API_TYPE to azure_ad. About Us To install this package run one of the following: conda install conda-forge::langchain-core Description LangChain Core contains the core abstractions powering LangChain, including LangChain Expression Language. LangChain is a framework for building natural language processing applications with large language models (LLMs). For more detailed instructions, refer to the LangChain Installation Guide. Credentials The cell below defines the credentials required to work with watsonx Foundation Model inferencing. The GitHub repository is very active; thus, ensure you have a current version. langchain-openai, langchain-anthropic, etc. Once you've To create LangChain Document objects (e. With just a Get setup with LangChain, LangSmith and LangServe; Use the most basic and common components of LangChain: prompt templates, models, and output parsers; Use LangChain Expression Language, the protocol that LangChain is built on and which facilitates component chaining; Build a simple application with LangChain; Trace your application with LangSmith 这将安装LangChain的基本最低要求。LangChain的很多价值在于将其与各种模型提供商，数据存储等集成。默认情况下，执行这些操作所需的依赖项并未安装。但是，还有两种其他的安装LangChain的方式可以带来这些依赖项。 Use LangChain Expression Language, the protocol that LangChain is built on and which facilitates component chaining; Build a simple application with LangChain; Trace your application with LangSmith; That's a fair amount to cover! Let's dive in. Install Langchain via: pip install langchain Apr 2, 2025 · %pip install --upgrade databricks-langchain langchain-community langchain databricks-sql-connector; Use Databricks served models as LLMs or embeddings If you have an LLM or embeddings model served using Databricks Model Serving, you can use it directly within LangChain in the place of OpenAI, HuggingFace, or any other LLM provider. 我们本次运行的python程序需要langchain_community模块，继续在虚拟环境中安装. vectorstores import DocArrayInMemorySearch from langchain_core. Supabase is built on top of PostgreSQL, which offers strong SQL querying capabilities and enables a simple interface with already-existing tools and frameworks. checkpoint. llamafile: Bundles model weights and everything needed to run the model in a single file, allowing you to run the LLM locally from this file without any additional installation steps In general, these frameworks will do a few things: Apr 4, 2025 · 🦜 ️ LangChain Text Splitters. Download the file for your platform. For full documentation see the API reference. conda install langchain -c conda-forge 虽然这个包作为使用 LangChain 的合理起点，但 LangChain 的大部分价值在于与各种大模型供应商、数据存储等的集成。默认情况下，进行这些操作所需的依赖项不会被安装。 How to install LangChain packages; How to add examples to the prompt for query analysis; How to use few shot examples; How to run custom functions; How to use output parsers to parse an LLM response into structured format; How to handle cases where no queries are generated; How to route between sub-chains; How to return structured data from a model Feb 21, 2025 · This package contains the LangChain integration with Redis, providing powerful tools for vector storage, semantic caching, and chat history management. It contains algorithms that search in sets of vectors of any size, up to ones that possibly do not fit in RAM. 6. For example, there are document loaders for loading a simple . Install All Dependencies pip install langchain[all] If you want absolutely everything, use the [all] extra to install optional dependencies The README also mentions installation instructions (`pip install -U langchain`) and links to various resources including tutorials, how-to guides, conceptual guides, and API references. To access AzureOpenAI models you'll need to create an Azure account, create a deployment of an Azure OpenAI model, get the name and endpoint for your deployment, get an Azure OpenAI API key, and install the langchain-openai integration package. graph import END, START, StateGraph, MessagesState from langgraph. Apr 30, 2025 · langchain-google-genai. LangChain生态系统中的包大多依赖于langchain-core，它包含了其他包 This page covers how to use the GPT4All wrapper within LangChain. If you prefer using Conda, you can install LangChain with the following command: conda Jun 4, 2024 · pip install -e . Install the LangChain partner package Next, install the LangChain Community package: pip install langchain-community These installations will enable you to leverage the functionalities of both Layerup Security and LangChain in your application. com/siddiquiamir/llamaindexAbout this video: In this video, you will learn how to Ins How to install LangChain packages; How to add examples to the prompt for query analysis; How to use few shot examples; How to run custom functions; How to use output parsers to parse an LLM response into structured format; How to handle cases where no queries are generated; How to route between sub-chains; How to return structured data from a model Installing integration packages . , unit tests pass). com to sign up to OpenAI and generate an API key. Apr 15, 2025 · langchain-chroma. 这是安装 LangChain 的最低要求。这里我要提醒你一点，LangChain 要与各种模型、数据存储库集成，比如说最重要的OpenAI的API接口，比如说开源大模型库HuggingFace Hub，再比如说对各种向量数据库的支持。 LangChain 是一个强大的框架，用于开发基于大语言模型（LLM）的应用程序。它提供了丰富的工具和接口，使得开发者能够轻松地构建、测试和部署复杂的语言模型应用。本文将详细介绍如何在Windows环境下安装LangChain，并快速搭建开发环境。 Aug 24, 2024 · Installing LangChain and getting started with AI can feel a little daunting at first. In this tutorial, we are using version 0. After installation, you can verify that the packages are correctly installed by running: Split code. Local You can run Unstructured locally in your computer using Docker. However, with this complete walkthrough, you should now have a handle on the installation process, verification, and even some example workflows to jumpstart your projects. % pip install - qU langchain - text - splitters from langchain_text_splitters import RecursiveCharacterTextSplitter Mar 7, 2025 · pip install langchain-cli Copy PIP instructions. export GROQ_API_KEY = gsk_ Chat Model. This is often the best starting point for individual developers. Navigation. For details, see Managing user API keys. nomic. Faiss is a library for efficient similarity search and clustering of dense vectors. This package contains the LangChain integration for Anthropic's generative models. This notebook covers how to load data from a Jupyter notebook (. LangChain 核心. 0. ai through the ibm-watsonx-ai SDK. These multi-modal embeddings can be used to embed images or text. Installation pip install-U langchain-google-vertexai Chat Models. ai models you'll need to create an IBM watsonx. This package contains the LangChain integrations for huggingface related classes. Also, mlflow >= 2. If your code is already relying on RunnableWithMessageHistory or BaseChatMessageHistory, you do not need to make any changes. If you are using either of these, you can enable LangSmith tracing with a single environment variable. This page covers all integrations between Anthropic models and LangChain. Released: Jan 8, 2025. Development. Supabase is an open-source Firebase alternative. agents import AgentType from langchain. Installation pip install-U langchain-google-genai Chat Models. You’ll also need an Anthropic API key, which you can obtain here from their console. Installation pip install-U langchain-unstructured . g. It provides components, chains, agents, and integrations for working with LLMs in various environments and scenarios. langchain-community is currently on version Apr 7, 2025 · langchain-postgres. The LangChain Ollama integration lives in the langchain-ollama package: % pip install - qU langchain - ollama Make sure you're using the latest Ollama version for structured outputs. Credentials You'll need to have a Hugging Face Access Token saved as an environment variable: HUGGINGFACEHUB_API_TOKEN. ): Important integrations have been split into lightweight packages that are co-maintained by the LangChain team and the integration developers. Apr 1, 2025 · langchain-ibm. Installation To use Anthropic models, you will need to install the langchain-anthropic package. This package provides the integration between LangChain and IBM watsonx. This package contains the LangChain integrations with AWS. pip install langchain. Apr 17, 2025 · langchain-anthropic. ai/ to sign up to Nomic and generate an API key. It can be used to for chatbots, G enerative Q uestion- A nwering (GQA), summarization, and much more. messages import HumanMessage from langchain_anthropic import ChatAnthropic from langchain_core. Installation Install langchain_community. They can be as specific as @langchain/anthropic, which contains integrations just for Anthropic models, or as broad as @langchain/community, which contains broader variety of community contributed integrations. LLMs Bedrock . env file, To access UnstructuredLoader document loader you’ll need to install the @langchain/community integration package, and create an Unstructured account and get an API key. Once you are all setup, import the langchain Python package. The langchain-nvidia-ai-endpoints package contains LangChain integrations building applications with models on NVIDIA NIM inference microservice. Oct 14, 2024 · conda install langchain -c conda-forge 安装LangChain的基础包后，可以通过集成其他模型提供商和数据存储来利用LangChain的完整功能。这些集成的依赖关系默认情况下不会安装，需要单独安装。 2. prompts import ChatPromptTemplate from langchain_core. LangChain CLI는 LangChain템플릿과 다른 LangServe프로젝트를 조작할 때 유용하다. llms import OpenAI # 首先，让我们加载我们要用来控制代理的语言模型。 Install the 0. Installation pip install-U langchain-redis This will install the package along with its dependencies, including redis, redisvl, and ulid. Still, this is a great way to get started with LangChain - a lot of features can be built with just some prompting and an LLM call! or pip install "langserve[client]" for client code, and pip install "langserve[server]" for server code. 3. Initialization Apr 16, 2025 · langchain-ollama. DocArray gives you the freedom to establish flexible document schemas and choose from different backends for document storage. Setup To access Chroma vector stores you'll need to install the langchain-chroma integration package. x， 19. load() Once you import a document, you can use the indexes to analyze and extract information from a document. To access Nomic embedding models you'll need to create a/an Nomic account, get an API key, and install the langchain-nomic integration package. For full documentation see the API reference and the Text Splitters module in the main docs. py 。 The LangChain integrations related to Amazon AWS platform. Amazon Bedrock is a fully managed service that offers a choice of high-performing foundation models (FMs) from leading AI companies like AI21 Labs, Anthropic, Cohere, Meta, Stability AI, and Amazon via a single API, along with a broad set of capabilities you need to build generative AI applications with security, privacy Anthropic. To access IBM watsonx. Project description To access langchain_huggingface models you'll need to create a/an Hugging Face account, get an API key, and install the langchain_huggingface integration package. Sep 19, 2024 · pip install langchain-community==0. x versions of langchain-core, langchain and upgrade to recent versions of other packages that you may be using. Learn how to install LangChain and its components, and explore various tutorials for chatbots, semantic search, classification, extraction, and more. To develop the langchain-groq package, you'll need to follow these instructions: Install dev dependencies poetry install--with test,test_integration Jupyter Notebook. Installation and Setup. Anthropic is an AI safety and research company, and is the creator of Claude. This guide (and most of the other guides in the documentation) uses Jupyter notebooks and assumes the reader is as well. Description. langgraph, langchain-community, langchain-openai, etc. About Us To access DeepSeek models you'll need to create a/an DeepSeek account, get an API key, and install the langchain-deepseek integration package. After creating your document index, you can connect it to your Langchain app using DocArrayRetriever. ChatBedrock class exposes chat models from Bedrock. /. pip install langchain-mcp-adapters langgraph langchain-openai export OPENAI_API_KEY = <your_api_key> Server. Configuration Apr 5, 2024 · langchain-aws. It's a package that contains cutting-edge code and is intended for research and experimental purposes. See this debugpy issue for more details. import langchain API keys Use document loaders to load data from a source as Document's. CodeTextSplitter allows you to split your code with multiple languages supported. x To use AAD in Python with LangChain, install the azure-identity package. However, it is not required if you are only part of a single organization or intend to use your default organization. Once you've done this set the DEEPSEEK_API_KEY environment variable: Installation with Windows . agents import initialize_agent from langchain. For more custom logic for loading webpages look at some child class examples such as IMSDbLoader, AZLyricsLoader, and CollegeConfidentialLoader. ANACONDA. This package contains the LangChain integration with Unstructured. 74がインストールされました。以上、LangChainのインストールを説明しました。次は、LangChainの動作確認を説明します。这将安装LangChain的最小要求。 LangChain的很多价值在于将其与各种模型提供程序、数据存储等集成。默认情况下，并没有安装执行这些操作所需的依赖项。但是，还有两种其他安装LangChain的方法，可以带来这些依赖项。要安装用于常见LLM提供程序的模块，请运行： % pip install --upgrade --quiet langchain langchain-community langchainhub langchain-openai langchain-chroma bs4 We need to set environment variable OPENAI_API_KEY for the embeddings model, which can be done directly or loaded from a . raw_documents = TextLoader ('. To use, you should have an Anthropic API key configured. Download files. To use the langchain-ibm package, follow these installation steps: pip install langchain-ibm Usage Setting up. You will also need to run the Ollama server locally. Oct 25, 2022 · langchain is a library that helps you create applications with large language models (LLMs) through composability. It also includes supporting code for evaluation and parameter tuning. It also provides the ability to read the saved file from Python's implementation. The tutorial is divided into two parts: installation and setup, followed by usage with an example. You can see their recommended models here. ): Some integrations have been further split into their own lightweight packages that only depend on @langchain/core. Chat models Bedrock Chat . ipynb) into a format suitable by LangChain. Partner packages (e. Amazon Bedrock is a fully managed service that offers a choice of high-performing foundation models (FMs) from leading AI companies like AI21 Labs, Anthropic, Cohere, Meta, Stability AI, and Amazon via a single API, along with a broad set of capabilities you need to build generative AI applications with security, privacy, and responsible AI. Install uv: documentation on how to install it. See a usage example. env file like so: Install LangChain: Once your environment is activated, you can install LangChain by running the following command: conda install langchain -c conda-forge This command fetches the LangChain package from the conda-forge channel, which is a community-driven collection of recipes for the Conda package manager. Install it using: pip install langchain-experimental LangChain CLI is a handy tool for working with LangChain templates and LangServe projects. output_parsers import StrOutputParser from langchain_core. By data scientists, for data scientists. You can do this with the following command: Install the langchain-groq package if not already installed: pip install langchain-groq. Different packages This repository contains multiple packages: langchain-core: Base interfaces for key abstractions as well as logic for combining them in chains (LangChain Expression Language). To use IBM's models, you must have an IBM Cloud user API key. create_documents. Credentials . Document Loader Dec 21, 2024 · 你很有可能是langchain 安装失败了或者不完整。这种情况下需要确保 LangChain 已被完整地安装。操作步骤：执行 pip show langchain 指令来验证你的 langchain安装情况。如果执行失败, 需要重新执行指令pip install langchain进行安装. openai. langchain-core 包含 LangChain 生态系统的基本抽象，以及 LangChain 表达语言。它会被 langchain 自动安装，但也可以单独使用。安装方法： pip install langchain-core; LangChain 社区. Learn how to install, use, and contribute to langchain with documentation, examples, and resources. chat_models import ChatOpenAI from langchain. OpenClip is an source implementation of OpenAI's CLIP. 生态系统包. ) Verify that your code runs properly with the new packages (e. Installation pip install-U langchain-chroma Usage. , for use in downstream tasks), use . Chat Models. langchain-experimental 包包含实验性的 LangChain 代码，用于研究和实验用途。 Jan 23, 2024 · from typing import Annotated, Literal, TypedDict from langchain_core. x， 20. LangChain を使用する手順は以下の通りです。インストール; 環境設定; LLM を利用したアプリケーションの実装; 本文書では、まず、LangChain のインストール方法と環境設定の方法を説明します。 Invocation Invoke directly with args . Apr 11, 2024 · pip install langchain_core langchain_anthropic If you’re working in a Jupyter notebook, you’ll need to prefix pip with a % symbol like this: %pip install langchain_core langchain_anthropic. Installation pip install-U langchain-google-community Nov 22, 2024 · langchain-unstructured. Langchainjs supports using Faiss as a vectorstore that can be saved to file. 23; conda install To install this package run one of the following: conda install conda-forge::langchain-community 安装和设置支持的环境 . Once you've done this set the OPENAI_API_KEY environment variable: 3 days ago · Battle-tested: LangChain Core components have the largest install base in the LLM ecosystem, and are used in production by many companies. Installation and Setup Install the Python package with pip install gpt4all; Download a GPT4All model and place it in your desired directory Build controllable agents with LangGraph, our low-level agent orchestration framework. Installation and Setup As of the v0. Quick Install pip install langchain-text-splitters What is it? LangChain Text Splitters contains utilities for splitting into chunks a wide variety of text documents. langchain: Chains, agents, and retrieval strategies that make up an application's cognitive architecture. Installation and Setup Simply install langchain-docling from your package manager, e. For more see the how-to guide for setting up LangSmith with LangChain or setting up LangSmith with LangGraph. Amazon API Gateway . modern-installation false) and re-installing requirements. This package contains the LangChain integrations for Gemini through their generative-ai SDK. Request an API key and set it as an environment variable: To access Google Generative AI embedding models you'll need to create a Google Cloud project, enable the Generative Language API, get an API key, and install the langchain-google-genai integration package. OpenClip. Building with LangChain. prebuilt import ToolNode Mar 27, 2024 · Now, let’s install the essential packages your LangChain project needs: pip install langchain chromadb python-dotenv streamlit sentence-transformers. First, let's create an MCP server that can add and multiply numbers. . May 22, 2023 · We can install them with # pip install langchain openai python-dotenv tiktoken. Nov 8, 2024 · LangChain的基本安装特别简单。 pip install langchain. Credentials Head to the Azure docs to create your deployment and generate an API key. Mar 28, 2025 · LangChainとは？ LangChainはAI、特に自然言語処理の分野で注目されているオープンソースのライブラリです。 ChatGPTといった汎用的なGPTモデルをより役立つように拡張するプラットフォームで、外部のデータソースやサービスと連携するアプリケーションを簡単に作れるよう設計されています。 Aug 11, 2024 · The LangChain Hub API client. Jupyter Notebook (formerly IPython Notebook) is a web-based interactive computational environment for creating notebook documents. Testing Note: In langchain, langchain-community, and langchain-experimental, some test dependencies are optional. LangChain CLI对于处理LangChain模板和其他LangServe项目非常有用。安装方法如下： If you are still seeing this bug on v1. LangChain CLI 🛠️ . Nov 15, 2023 · For experimental features, consider installing langchain-experimental. This allows full integration with LLMs. 用于客户端和服务器依赖项。或者pip install "langserve[client]"用于客户端代码，和pip install "langserve[server]"用于服务器代码。 LangChain CLI . You can follow most of the instructions in the repository itself but there are some windows specific instructions which might be useful. memory import MemorySaver from langgraph. Learn how to install the main langchain package and its dependencies for different integrations, such as OpenAI, Anthropic, and LangGraph. 3 release of LangChain, we recommend that LangChain users take advantage of LangGraph persistence to incorporate memory into new LangChain applications. ai account, get an API key, and install the langchain-ibm integration package. The following changes have been made: Apr 16, 2024 · # The Effortless LangChain Install Process. Installation pip install-U langchain-ollama . Action: Provide the IBM Cloud user API key. pip install -U langchain-anthropic. 安装特定集成包，例如安装 langchain-openai ：pip install langchain-openai; 任何没有被分离成自己包的集成将存在于 langchain-community 包中。安装：pip install langchain-community （四）实验性包. pip: pip install langchain-docling. Deploy and scale with LangGraph Platform, with APIs for state management, a visual studio for debugging, and multiple deployment options. The interactive chat interface doesn’t require any Python. The package is released under the MIT license. Sep 14, 2024 · 见上图，接着在虚拟环境中安装 langchain. Installation The LangChain Databricks integration lives in the langchain-community package. In this essay, we will explore a detailed, step-by-step guide on how to install LangChain using PyPI. Once you have it, set as an environment variable named ANTHROPIC % pip install -qU langchain-openai Should you need to specify your organization ID, you can use the following cell. Now that your computer is prepared for the LangChain installation, let's delve into the straightforward process of installing this powerful Python framework. pdf") documents = loader. Anthropic recommends using their chat models over text completions. 2. 它们可以像 @langchain/anthropic 一样具体，其中仅包含 Anthropic 模型的集成，也可以像 @langchain/community 一样广泛，其中包含更广泛的社区贡献集成。这些包以及主要的 LangChain 包都具有 @langchain/core 作为对等依赖项，以避免包管理器安装同一包的多个版本。它包含 Integration packages (e. % pip install -qU langchain_community. Installation pip install-U langchain-aws All integrations in this package assume that you have the credentials setup to connect with AWS services. js is a framework for developing applications powered by language models. Dec 9, 2021 · With DocArray, you can connect external data to LLMs through Langchain. Here is a simple example of using the MCP tools with a LangGraph agent. Here's how to obtain and set up your LangChain を Python で使う概要 . This package contains the LangChain integration with Ollama. Community : LangChain Core is developed in the open, and we welcome contributions from the community. pip install langchain あと注意が必要なのは、原則的にOpenAIのAPI Keyが必要になることです。 OpenAIにログインして、画面右上のPersonalメニューから"View API keys"を選択するとkeyの一覧と新規keyの追加ができる画面に遷移します。 3 days ago · langchain-huggingface. 📕 Releases & Versioning. The LangChain integrations related to Amazon AWS platform. Access Google's Generative AI models, including the Gemini family, directly via the Gemini API or experiment rapidly using Google AI Studio. The langchain-google-genai package provides the LangChain integration for these models. You can create one in Google AI Studio. See the 同时安装客户端和服务器依赖。或者使用 pip install "langserve[client]" 安装客户端代码，使用 pip install "langserve[server]" 安装服务器代码。 LangChain CLI. Oct 13, 2023 · # !pip install pypdf from langchain. This covers how to use WebBaseLoader to load all text from HTML webpages into a document format that we can use downstream. Jupyter notebooks are perfect interactive environments for learning how to work with LLM systems because oftentimes things can go wrong (unexpected output, API down, etc), and observing these cases is a great way to better understand building with LLMs. Additional Installation Options. Use the LangChain CLI to bootstrap a LangServe project quickly. All functionality related to Google Cloud Platform and other Google products. These applications use a technique known as Retrieval Augmented Generation, or RAG. This is a relatively simple LLM application - it's just a single LLM call plus some prompting. pip install langchain 3. pip install langchain_community 03. # pip install langchain docarray tiktoken from langchain_community. View the full docs of Chroma at this page, and find the API reference for the LangChain integration at this page. This package contains the LangChain integrations for Google products that are not part of langchain-google-vertexai or langchain-google-genai packages. Is there anything specific about LangChain you'd like to know more about, Bob? {'cache_read': 0, 'cache_creation': 1498} To install this package run one of the following: conda install conda-forge::langchain-openai. Feel free to use the abstraction as provided or else modify them / extend them as appropriate for your own application. Amazon API Gateway is a fully managed service that makes it easy for developers to create, publish, maintain, monitor, and secure APIs at any scale. tools import tool from langgraph. % pip install --upgrade --quiet langchain-experimental Setup . langchain-community 包含第三方集成。安装方法： pip install langchain-community To install this package run one of the following: conda install anaconda::langchain Description LangChain is a framework for developing applications powered by language models (LLMs). Import enum Language and specify the language. 执行LangChain代码. Docling LangChain integration. An implementation of LangChain vectorstore abstraction using postgres as the backend and utilizing the pgvector extension. 1; Verify the Installation: Once the installation completes, you can verify that langchain-community has been installed correctly by running: Apr 28, 2025 · Quick Install pip install langchain-community What is it? LangChain Community contains third-party integrations that implement the base interfaces defined in LangChain Core, making them ready-to-use in any LangChain application. document_loaders import TextLoader from langchain_openai import OpenAIEmbeddings from langchain_text_splitters import CharacterTextSplitter from langchain_chroma import Chroma # Load the document, split it into chunks, embed each chunk and load it into the vector store. LangChain supports packages that contain module integrations with individual third-party providers. $ pip install langchain-cli 또한 LangChain CLI에 포함된 다음 라이버리를 개별적으로 설치하는 방법은 아래와 같다. Status This code has been ported over from langchain_community into a dedicated package called langchain-postgres. A Document is a piece of text and associated metadata. Latest version. May 13, 2024 · How to install LangChain packages; How to add examples to the prompt for query analysis; How to use few shot examples; How to run custom functions; How to use output parsers to parse an LLM response into structured format; How to handle cases where no queries are generated; How to route between sub-chains; How to return structured data from a model 5 days ago · Installation pip install langchain-mcp-adapters Quickstart. This package contains the LangChain integration with Chroma. noarch v0. We recommend individual developers to start with Gemini API (langchain-google-genai) and move to Vertex AI (langchain-google-vertexai) when they need access to commercial support and higher rate limits. 147. jxkhy brxf wcoh gkgbvn hrnbi wgxz iohci tdrsn xnr mxxsbk fklisc dkawh kacqba uhwad ibtjtu