pip install --upgrade --quiet langchain-core langchain-community langchain-openai 我在环境变量中配置了,所以后续在代码中可以省略这个参数。 export OPENAI_API_KEY="sk-UkyBxxxx" export OPENAI_API_BASE="https://wzk..." 编写代码 from langchain_core.output_parsers import JsonOutputParser from ...
model | JsonOutputParser() ) # Due to a bug in older versions of Langchain, JsonOutputParser did not stream results from some models async for text in chain.astream( 'output a list of the countries france, spain and japan and their populations in JSON format. Use a dict with an outer...
from langchain_core.output_parsers import JsonOutputParserfrom langchain_openai.chat_models import ChatOpenAIasync def main():model = ChatOpenAI(model="gpt-3.5-turbo",)chain = (model | JsonOutputParser()) # Due to a bug in older versions of Langchain, JsonOutputParser did not stream result...
fromlangchain.output_parsersimportResponseSchema, StructuredOutputParserfromlangchain_community.llms.ollamaimportOllamafromlangchain_core.promptsimportPromptTemplate llm= Ollama(model="qwen:7b")#你希望你的回复结构模板response_schems =[#定义返回字段ResponseSchema(name="user_name", description="这是一个...
from langchain_core.output_parsers import StrOutputParserfrom langchain_core.prompts import PromptTemplatefrom langchain_openai import ChatOpenAIllm = ChatOpenAI(model_name="gpt-3.5-turbo", temperature=0.5, max_tokens=200)summarizing_prompt_template = """输出为 JSON 格式,包含字段 content、summary。
在langchian.js中,Structured output parser就是使用Zod来声明和校验JSON格式。 1.3.1 声明返回JSON格式 import { z } from"zod";import { StructuredOutputParser } from"langchain/output_parsers"; const parser = StructuredOutputParser.fromZodSchema(z.object({answer: z.string().describe("answer to the...
在Python 中,我们可以使用 JSON 格式来存储和传输数据。本文将介绍如何使用 Python 解析和输出成功的问答对 JSON 数据。我们将使用 langchain_core 库中的 ChatPromptTemplate 和 StrOutputParser 来实现这个过程,并提供了相应的示例代码。 第一部分:准备工作 ...
By using the default stream mode: const langChainMessages = mapToLangChainMessages(messages); const http = new HttpResponseOutputParser(); const stream = await model.pipe(http).stream(langChainMessages); return new Response(stream); it w...
在langchian.js中,Structured output parser就是使用Zod来声明和校验JSON格式。 1.3.1 声明返回JSON格式 import { z } from"zod";import { StructuredOutputParser } from"langchain/output_parsers"; const parser = StructuredOutputParser.fromZodSchema(z.object({answer: z.string().describe("answer to the...
在langchian.js中,Structured output parser就是使用Zod来声明和校验JSON格式。 1.3.1 声明返回JSON格式 import { z } from "zod"; import { StructuredOutputParser } from "langchain/output_parsers"; const parser = StructuredOutputParser.fromZodSchema( z.object({ answer: z.string().describe("answer ...