Install langchain 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. It provides components, chains, agents, and integrations for working with LLMs in various environments and scenarios. 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. This package contains the LangChain integration for Anthropic's generative models. langchain-experimental 包包含实验性的 LangChain 代码，用于研究和实验用途。 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 . x， 20. To use, you should have an Anthropic API key configured. 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). In this quickstart we'll show you how to build a simple LLM application with LangChain. O uso do LangChain geralmente requer integrações com um ou mais provedores de modelo, armazenamento de dados, APIs, etc. Credentials A valid API key is needed to communicate with the API. ai account, get an API key, and install the langchain-ibm integration package. 3. Chat models . How to: return structured data from an LLM; How to: use a chat model to call tools; How to: stream runnables; How to: debug your LLM apps; LangChain Expression Language (LCEL) LangChain Expression Language is a way to create arbitrary custom chains. 3 release of LangChain, we recommend that LangChain users take advantage of LangGraph persistence to incorporate memory into new LangChain applications. ai models you'll need to create an IBM watsonx. Nov 16, 2023 · Learn how to install LangChain, an open-source Python framework for working with large language models, using PyCharm, pip, or GitHub. Configuration 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. Installation pip install-U langchain-google-vertexai Chat Models. Additional Installation Options. It is stable to install the llama-cpp-python library by compiling from the source. % pip install -qU langchain_community pymupdf. Mar 31, 2025 · Install the integration package: pip install langchain-groq Request an API key and set it as an environment variable. 生态系统包. ChatVertexAI class exposes models such as gemini-pro and chat-bison. tools import tool from langgraph. Testing Note: In langchain, langchain-community, and langchain-experimental, some test dependencies are optional. x， 19. Learn how to install, use, and contribute to langchain with documentation, examples, and resources. LangChain is a framework for building natural language processing applications with large language models (LLMs). This application will translate text from English into another language. This page covers all integrations between Anthropic models and LangChain. Description. If you prefer using Conda, you can install LangChain with the following command: conda To install this package run one of the following: conda install conda-forge::langchain-openai. It is built on the Runnable protocol. pip show langchain 如果仍然有问题。 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. 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. The Neo4jGraph class is a wrapper around Neo4j's Python driver. Integrate Atlas Vector Search with LangChain for a walkthrough on using your first LangChain implementation with MongoDB Atlas. Document Loader Mar 27, 2024 · Now, let’s install the essential packages your LangChain project needs: pip install langchain chromadb python-dotenv streamlit sentence-transformers. Apr 22, 2025 · langchain is a library that helps you create applications with large language models (LLMs) through composability. Chat models Bedrock Chat . Chat Models. Initialize Apr 24, 2025 · langchain-google-vertexai. See the dependency graph, installation commands, and source options for each package. checkpoint. In this essay, we will explore a detailed, step-by-step guide on how to install LangChain using PyPI. LangChain v0. LangChain 프레임워크의 구성 1-1-3. For more detailed instructions, refer to the LangChain Installation Guide. 글쓴이 소개 Part 1. env file like so: 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. This blog post also covers environment setup, importing the langchain module, and adding steps to a chain. Jun 4, 2024 · pip install -e . This guide (and most of the other guides in the documentation) uses Jupyter notebooks and assumes the reader is as well. Once you've done this set the GOOGLE_APPLICATION_CREDENTIALS environment variable: For more information, see: Installation with Windows . export GROQ_API_KEY = gsk_ Chat Model. Anthropic recommends using their chat models over text completions. If your code is already relying on RunnableWithMessageHistory or BaseChatMessageHistory, you do not need to make any changes. To access IBM watsonx. Action: Provide the IBM Cloud user API key. If you want to integrate LangChain into an application, some Python skills will be needed. Anthropic. % pip install -qU langchain_community pypdf. 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. Mar 21, 2025 · Installation pip install-U langchain-deepseek And you should configure credentials by setting the following environment variables: DEEPSEEK_API_KEY; Chat Models. Credentials Head to Google Cloud to sign up to create an account. Is there anything specific about LangChain you'd like to know more about, Bob? {'cache_read': 0, 'cache_creation': 1498} 安装和设置 支持的环境 . 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. Development. Mar 28, 2025 · To get started, install LangChain and OpenAI’s API package using pip, open your terminal, and run the following command: Plain Text pip install langchain langchain_openai openai. prebuilt import ToolNode 랭체인(LangChain) 입문부터 응용까지 Part 0. pip install -U langchain-anthropic. langchain-community 包含第三方集成。安装方法： pip install langchain-community Turn off and restart Visual Studio Code. Note: you may need to restart the kernel to use updated packages. It can be used to for chatbots, G enerative Q uestion- A nwering (GQA), summarization, and much more. 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： Basic Python knowledge will be helpful to install and run LangChain, but it’s not required. js (ESM 和 CommonJS) - 18. Apr 16, 2025 · langchain-mongodb Installation pip install -U langchain-mongodb Usage. Install All Dependencies pip install langchain[all] If you want absolutely everything, use the [all] extra to install optional dependencies As of the v0. See a usage example. You can follow most of the instructions in the repository itself but there are some windows specific instructions which might be useful. The interactive chat interface doesn’t require any Python. 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. 📦 Installation pip install-U langchain-neo4j 💻 Examples Neo4jGraph. Installation. 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. May 16, 2023 · Para começar, instale o LangChain com o seguinte comando: pip install langchain # or conda install langchain -c conda-forge Configurações do ambiente. 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： 5 days ago · from typing import Annotated, Literal, TypedDict from langchain_core. LangChain supports packages that contain module integrations with individual third-party providers. 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 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 . conda install langchain -c conda-forge 虽然此包充当使用 LangChain 的合理起点，但 LangChain 的大部分价值来自于将其与各种模型提供商、数据存储等集成。 默认情况下，执行此操作所需的依赖项未安装。 This highlights functionality that is core to using LangChain. Credentials The cell below defines the credentials required to work with watsonx Foundation Model inferencing. See how to configure logging, model loading, and basic usage examples. Once you've done this set the MISTRAL_API_KEY environment variable: Google. You can see their recommended models here. from langchain_deepseek import ChatDeepSeek llm = ChatDeepSeek (model = "deepseek-chat") llm. Installation Install langchain_community and pypdf. . To develop the langchain-groq package, you'll need to follow these instructions: Install dev dependencies poetry install--with test,test_integration noarch v0. Learn how to install the main langchain package and its dependencies for different integrations, such as OpenAI, Anthropic, and LangGraph. Installation and Setup Feb 21, 2025 · This package contains the LangChain integration with Redis, providing powerful tools for vector storage, semantic caching, and chat history management. To use, you should have Google Cloud project with APIs enabled, and configured credentials. Intro to LangChain LangChain is a popular framework that allow users to quickly build apps and pipelines around L arge L anguage M odels. ANACONDA. This allows full integration with LLMs. Sep 6, 2023 · Learn how to install LangChain using Pip, Conda, or from source, and how to create and execute a chain with OpenAI's model APIs. Building with LangChain. modern-installation false) and re-installing requirements. Using MongoDBAtlasVectorSearch 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 install this package run one of the following: conda install conda-forge::langchain. 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! 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. 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. See the 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。 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. See this debugpy issue for more details. x Aug 17, 2024 · pip install langchain-openai Using Conda: conda install -c conda-forge langchain-openai. 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： 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. All functionality related to Google Cloud Platform and other Google products. LangChain. 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. LangChain 是使用 TypeScript 编写的，可以在以下环境中使用: Node. About Us Feb 19, 2025 · Setup Jupyter Notebook . LangChain 核心. Installation To install LangChain run: 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 Nov 8, 2024 · LangChain的基本安装特别简单。 pip install langchain. 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. To access ChatMistralAI models you'll need to create a Mistral account, get an API key, and install the langchain_mistralai integration package. This package contains the LangChain integrations for Google Cloud generative models. This is a relatively simple LLM application - it's just a single LLM call plus some prompting. This package contains the LangChain integration with Neo4j. Learn how to install LangChain and its components, and explore various tutorials for chatbots, semantic search, classification, extraction, and more. g. It provides a simple interface for interacting with a Neo4j database. messages import HumanMessage from langchain_anthropic import ChatAnthropic from langchain_core. 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。 If you are still seeing this bug on v1. pip: pip install langchain-docling. By data scientists, for data scientists. 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. graph import END, START, StateGraph, MessagesState from langgraph. Sep 18, 2024 · The installation of LangChain is straightforward through the Python Package Index (PyPI). About Us Install the langchain-google-vertexai integration package. LangChain 이란? 1-1-1. 0 출시 의미 1-1-2. Anthropic is an AI safety and research company, and is the creator of Claude. The installation is complete, and you can click the "select kernel" button in the top right corner. memory import MemorySaver from langgraph. 6. Installation Install langchain_community and pymupdf. 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 . 1+, you may also try disabling "modern installation" (poetry config installer. Mar 3, 2025 · 🦜️🔗 LangChain Neo4j. invoke ("Sing a ballad of LangChain. js is a framework for developing applications powered by language models. For details, see Managing user API keys. ChatDeepSeek class exposes chat models from DeepSeek. ") Apr 17, 2025 · langchain-anthropic. 23; conda install To install this package run one of the following: conda install conda-forge::langchain-community 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. 1. LangChain生态系统中的包大多依赖于langchain-core，它包含了其他包 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. Click python environment - if you don't see the virtual environment you installed, turn off Visual Studio Code and restart it Aug 24, 2024 · Installing LangChain and getting started with AI can feel a little daunting at first. 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。 Installation and Setup Simply install langchain-docling from your package manager, e. Step 3: Installing llama-cpp-python. LangChain 기초 1-1. Installation pip install-U langchain-redis This will install the package along with its dependencies, including redis, redisvl, and ulid. dedtzw vlian vqqxv tgflc dubuf jbknk qzhi hijavb dru waf dezpi aodw zjh dlezzgb gfts