pip install -qU "langchain[google-genai]" importgetpass importos ifnotos.environ.get("GOOGLE_API_KEY"): os.environ["GOOGLE_API_KEY"]=getpass.getpass("Enter API key for Google Gemini: ") fromlangchain.chat_models
npm yarn pnpm yarn add @langchain/openai @langchain/core Instantiation Now we can instantiate our model object and generate chat completions: import { ChatOpenAI } from "@langchain/openai";const llm = new ChatOpenAI({ model: "gpt-4o", temperature: 0, // other params...});Invocati...
与controller不同的是,controller通常处于view和model中间,而langchain的控制流程处于chain与chain之间,也就是将多个LLM串起来的中间连接部分。 这种chain的方式,在langchain中,我们可以选择用 if else 控制,也可以选择 LCEL(langchan expression language,langchain表达语言)。使用LCEL时,控制逻辑发生在LLM的输出层之前,...
要开始使用 Langchain,首先确保安装了最新版本的框架及其相关组件。以下步骤指导你完成安装过程: 安装: pip install langchain 对于特定功能的集成,如与 OpenAI 的集成,可以安装额外的库: pip install langchain_openai 配置环境变量: 为了与 OpenAI 等模型服务集成,需要设置 API 密钥: import os os.environ["OPENAI...
import{HNSWLib}from"@langchain/community/vectorstores/hnswlib"; import{RecursiveCharacterTextSplitter}from"langchain/text_splitter"; import*asfsfrom"fs"; import{loadQAMapReduceChain}from"langchain/chains"; // Initialize the LLM to use to answer the question. ...
LangChain Tools contain a description of the tool (to pass to the language model) as well as the implementation of the function to call. Refer here for a list of pre-buit tools. How to: create tools How to: use built-in tools and toolkits How to: use chat models to call tools Ho...
🦜️🔗LangChain Rust ⚡ Building applications with LLMs through composability, with Rust! ⚡ 🤔 What is this? This is the Rust language implementation ofLangChain. Current Features LLMs OpenAi Azure OpenAi Ollama Anthropic Claude
基于🦜️🔗 LangChain 与DeepSeek R1 大语言模型的本地知识库问答。 本项目是本地知识库问答应用的 serve 后端。目前实现基本的 RAG 功能。 后续会系统学习 langchain ,逐步添加更多的功能。 项目使用 FastAPI + Uvicorn + SQLModel + SQLite 框架。 向量数据库使用 Chroma。 为了直观的体现API交互,可搭配...
%pip install -qU langchain langchain-community langchain-openai faker langchain-chromaNote: you may need to restart the kernel to use updated packages.Set environment variablesWe'll use OpenAI in this example:import getpassimport osif "OPENAI_API_KEY" not in os.environ: os.environ["...
# os.environ["LANGSMITH_API_KEY"] = getpass.getpass("Enter your LangSmith API key: ") Installation The LangChain vLLM integration can be accessed via thelangchain-openaipackage: %pip install-qU langchain-openai Instantiation