SambanovaEmbeddings 集成

使用 LangChain Python 集成 SambanovaEmbeddings 向量嵌入模型。

本指南将帮助您开始使用 SambaNova 向量嵌入模型 using LangChain. For detailed documentation on SambaNovaEmbeddings 功能和配置选项的详细文档，请参阅 API reference.

SambaNova’s SambaCloud is a platform for performing inference with open-source models

概述

集成详情

提供商	包
SambaNova	langchain-sambanova

设置

要访问 SambaNovaEmbeddings models you will need to create a SambaCloud account, get an API key, install the langchain_sambanova 集成包。

pip install langchain-sambanova

凭证

Get an API Key from cloud.sambanova.ai.完成后设置 SAMBANOVA_API_KEY 环境变量：

import getpass
import os

if not os.getenv("SAMBANOVA_API_KEY"):
    os.environ["SAMBANOVA_API_KEY"] = getpass.getpass("Enter your SambaNova API key: ")

要启用模型调用的自动追踪，请设置您的 LangSmith API key:

os.environ["LANGSMITH_TRACING"] = "true"
os.environ["LANGSMITH_API_KEY"] = getpass.getpass("请输入您的 LangSmith API 密钥: ")

安装

LangChain 的 SambaNova 集成位于 langchain-sambanova 包中：

pip install -qU langchain-sambanova

实例化

现在我们可以实例化模型对象并生成聊天补全：

from langchain_sambanova import SambaNovaEmbeddings

embeddings = SambaNovaEmbeddings(
    model="E5-Mistral-7B-Instruct",
)

索引与检索

向量嵌入模型常用于检索增强生成 (RAG) 流程中, 既用于索引数据，也用于后续检索数据。 更详细的说明请参阅我们的 RAG tutorials.

下面展示如何使用 embeddings 对象来索引和检索数据。 在此示例中，我们将在 InMemoryVectorStore.

# 使用示例文本创建向量存储
from langchain_core.vectorstores import InMemoryVectorStore

text = "LangChain is the framework for building context-aware reasoning applications"

vectorstore = InMemoryVectorStore.from_texts(
    [text],
    embedding=embeddings,
)

# Use the vectorstore as a retriever
retriever = vectorstore.as_retriever()

# Retrieve the most similar text
retrieved_documents = retriever.invoke("What is LangChain?")

# show the retrieved document's content
retrieved_documents[0].page_content

直接使用

Under the hood, the vectorstore and retriever implementations are calling embeddings.embed_documents(...) and embeddings.embed_query(...) to create embeddings for the text(s) used in from_texts and retrieval invoke operations, respectively.

You can directly call these methods to get embeddings for your own use cases.

Embed single texts

You can embed single texts or documents with embed_query:

single_vector = embeddings.embed_query(text)
print(str(single_vector)[:100])  # Show the first 100 characters of the vector

Embed multiple texts

You can embed multiple texts with embed_documents:

text2 = (
    "LangGraph is a library for building stateful, multi-actor applications with LLMs"
)
two_vectors = embeddings.embed_documents([text, text2])
for vector in two_vectors:
    print(str(vector)[:100])  # Show the first 100 characters of the vector

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API 参考

For detailed documentation on SambaNovaEmbeddings 功能和配置选项的详细文档，请参阅 SambaNova Developer Guide.

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