Dappier

Dappier 连接任何语言模型或您的 Agentic AI 到实时、权利清白的专属数据源，使您的 AI 成为任何领域的专家。我们的专业模型包括实时时搜网、新闻、体育、金融股市数据、加密货币数据以及来自顶级出版商的独家内容。在 marketplace.dappier.com 的市场中探索一系列数据模型。

Dappier 提供丰富、准备好的提示以及上下文相关的内容字符串，优化以实现与 LangChain 的无缝集成。无论您是在构建对话式 AI、推荐引擎还是智能搜索，Dappier 的 LLM-agnostic RAG 模型都能确保您的 AI 能访问经过验证的最新数据——无需自己构建和管理自己的检索管道。

DappierRetriever

这将帮助你开始使用Dappier 检索器。要查看所有DappierRetriever特性和配置的详细文档，请参阅API参考。

设置

安装 langchain-dappier 并设置环境变量 DAPPIER_API_KEY。

pip install -U langchain-dappier
export DAPPIER_API_KEY="your-api-key"

我们也需要设置 Dappier API 凭证，这些凭证可以在 Dappier 网站 生成。

我们可以通过访问Dappier市场来找到支持的数据模型。

如果您想要从单个查询中获取自动跟踪，您也可以通过取消注释下方代码来设置您的LangSmith API密钥：

# os.environ["LANGSMITH_API_KEY"] = getpass.getpass("Enter your LangSmith API key: ")
# os.environ["LANGSMITH_TRACING"] = "true"

安装

这个检索器位于langchain-dappier包中:

%pip install -qU langchain-dappier

Instantiation

• data_model_id: str Data model ID, starting with dm_. You can find the available data model IDs at: Dappier marketplace.
• k: int 文档数量。
• ref: 可选[str] Site域名，用于显示AI推荐。
• num_articles_ref: int Minimum number of articles from the ref domain specified. The rest will come from other sites within the RAG model.
• search_algorithm: Literal[ "最相关的最近", "语义最近", "语义", "热门" ] 搜索算法用于检索文章。
• api_key: Optional[str] 用于与Dappier API交互的API密钥。

from langchain_dappier import DappierRetriever

retriever = DappierRetriever(data_model_id="dm_01jagy9nqaeer9hxx8z1sk1jx6")

用法

query = "latest tech news"

retriever.invoke(query)

[Document(metadata={'title': 'Man shot and killed on Wells Street near downtown Fort Wayne', 'author': 'Gregg Montgomery', 'source_url': 'https://www.wishtv.com/news/indiana-news/man-shot-dies-fort-wayne-december-25-2024/', 'image_url': 'https://images.dappier.com/dm_01jagy9nqaeer9hxx8z1sk1jx6/fort-wayne-police-department-vehicle-via-Flickr_.jpg?width=428&height=321', 'pubdata': 'Thu, 26 Dec 2024 01:00:33 +0000'}, page_content='A man was shot and killed on December 25, 2024, in Fort Wayne, Indiana, near West Fourth and Wells streets. Police arrived shortly after 6:30 p.m. following reports of gunfire and found the victim in the 1600 block of Wells Street, where he was pronounced dead. The area features a mix of businesses, including a daycare and restaurants.\n\nAs of the latest updates, police have not provided details on the safety of the area, potential suspects, or the motive for the shooting. Authorities are encouraging anyone with information to reach out to the Fort Wayne Police Department or Crime Stoppers.'),
 Document(metadata={'title': 'House cat dies from bird flu in pet food, prompting recall', 'author': 'Associated Press', 'source_url': 'https://www.wishtv.com/news/business/house-cat-bird-flu-pet-food-recall/', 'image_url': 'https://images.dappier.com/dm_01jagy9nqaeer9hxx8z1sk1jx6/BACKGROUND-Northwest-Naturals-cat-food_.jpg?width=428&height=321', 'pubdata': 'Wed, 25 Dec 2024 23:12:41 +0000'}, page_content='An Oregon house cat has died after eating pet food contaminated with the H5N1 bird flu virus, prompting a nationwide recall of Northwest Naturals\' 2-pound Feline Turkey Recipe raw frozen pet food. The Oregon Department of Agriculture confirmed that the strictly indoor cat contracted the virus solely from the food, which has "best if used by" dates of May 21, 2026, and June 23, 2026. \n\nThe affected product was distributed across several states, including Arizona, California, and Florida, as well as British Columbia, Canada. Consumers are urged to dispose of the recalled food and seek refunds. This incident raises concerns about the spread of bird flu and its potential impact on domestic animals, particularly as California has declared a state of emergency due to the outbreak affecting various bird species.'),
 Document(metadata={'title': '20 big cats die from bird flu at Washington sanctuary', 'author': 'Nic F. Anderson, CNN', 'source_url': 'https://www.wishtv.com/news/national/bird-flu-outbreak-wild-felid-center-2024/', 'image_url': 'https://images.dappier.com/dm_01jagy9nqaeer9hxx8z1sk1jx6/BACKGROUND-Amur-Bengal-tiger-at-Wild-Felid-Advocacy-Center-of-Washington-FB-post_.jpg?width=428&height=321', 'pubdata': 'Wed, 25 Dec 2024 23:04:34 +0000'}, page_content='The Wild Felid Advocacy Center in Washington state has experienced a devastating bird flu outbreak, resulting in the deaths of 20 big cats, over half of its population. The first death was reported around Thanksgiving, affecting various species, including cougars and a tiger mix. The sanctuary is currently under quarantine, closed to the public, and working with animal health officials to disinfect enclosures and implement prevention strategies.\n\nAs the situation unfolds, the Washington Department of Fish and Wildlife has noted an increase in bird flu cases statewide, including infections in cougars. While human infections from bird flu through contact with mammals are rare, the CDC acknowledges the potential risk. The sanctuary hopes to reopen in the new year, focusing on the recovery of the remaining animals and taking measures to prevent further outbreaks, marking an unprecedented challenge in its 20-year history.')]

使用在链中

像其他检索器一样，DappierRetriever 可以通过 Chains 被集成到基于 LLM 的应用程序中。

我们需要一个大语言模型或聊天模型:

from langchain_openai import ChatOpenAI

llm = ChatOpenAI(model="gpt-3.5-turbo-0125", temperature=0)

API 参考:ChatOpenAI

from langchain_core.output_parsers import StrOutputParser
from langchain_core.prompts import ChatPromptTemplate
from langchain_core.runnables import RunnablePassthrough

prompt = ChatPromptTemplate.from_template(
    """Answer the question based only on the context provided.

Context: {context}

Question: {question}"""
)


def format_docs(docs):
    return "\n\n".join(doc.page_content for doc in docs)


chain = (
    {"context": retriever | format_docs, "question": RunnablePassthrough()}
    | prompt
    | llm
    | StrOutputParser()
)

API 参考:StrOutputParser |聊天提示模板 |可运行传递器

chain.invoke(
    "What are the key highlights and outcomes from the latest events covered in the article?"
)

"The key highlights and outcomes from the latest events covered in the article include:\n\n1. An Israeli airstrike in Gaza killed five journalists from Al-Quds Today Television, leading to condemnation from their outlet and raising concerns about violence against media professionals in the region.\n2. The Committee to Protect Journalists reported that since October 7, 2023, at least 141 journalists have been killed in the region, marking the deadliest period for journalists since 1992, with the majority being Palestinians in Gaza.\n3. A man was shot and killed in Fort Wayne, Indiana, with police not providing details on suspects, motive, or the safety of the area.\n4. An Oregon house cat died after eating pet food contaminated with the H5N1 bird flu virus, leading to a nationwide recall of Northwest Naturals' Feline Turkey Recipe raw frozen pet food and raising concerns about the spread of bird flu among domestic animals."

API 参考

有关 DappierRetriever 所有功能和配置的详细文档，请访问 API 参考。

相关

• 检索器 概念指南
• 检索器 如何指南