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做图片网站,电脑自带的做网站叫什么,给网站做镜像,智慧团建注册登录入口电脑版本文我们将讨论GraphRAG#xff08;Graph-based Retrieval Augmented Generation#xff09;的实现流程#xff0c;其中使用OpenAI进行自然语言处理#xff0c;使用neo4j作为图数据库。在这个流程中#xff0c;我们将展示#xff1a; 首先将文本转换为图结构然后将图结构…本文我们将讨论GraphRAGGraph-based Retrieval Augmented Generation的实现流程其中使用OpenAI进行自然语言处理使用neo4j作为图数据库。在这个流程中我们将展示首先将文本转换为图结构然后将图结构存储在neo4j中最后提取用户问题中的实体使用提取到的实体检索相关的实体和他们的关系再借助llm生成回答Marie Curie, born in 1867, was a Polish and naturalised-French physicist and chemist who conducted pioneering research on radioactivity.She was the first woman to win a Nobel Prize, the first person to win a Nobel Prize twice, and the only person to win a Nobel Prize in two scientific fields.Her husband, Pierre Curie, was a co-winner of her first Nobel Prize, making them the first-ever married couple to win the Nobel Prize and launching the Curie family legacy of five Nobel Prizes.She was, in 1906, the first woman to become a professor at the University of Paris.将上述文本使用OpenAI将文本转换为图表示并存储在neo4j中在上图中紫色的节点(df48cdaf)代表文档红色节点(Nobel Prize)诺贝尔奖两个蓝色的节点代表人名玛丽·居里、皮埃尔·居里灰色的代表(University Of Paris)巴黎大学。其中文档和其他所有节点的关系是提及(mentions)。一、GraphRAG实现为了快速了解GraphRAG背后的逻辑可以使用OpenAi api、neo4j sandbox在快速开始实验安装及导入包!pip install langchain!pip install -U langchain-community!pip install sentence-transformers!pip install faiss-gpu!pip install pypdf!pip install faiss-cpu!pip install langchain-openai!pip install langchain-experimental!pip install json-repair!pip install neo4jfrom langchain_openai importChatOpenAIfrom langchain.chainsimportRetrievalQAfrom langchain.document_loadersimportPyPDFLoaderfrom langchain.text_splitterimportCharacterTextSplitterfrom langchain.embeddingsimportHuggingFaceEmbeddingsfrom langchain.vectorstoresimportFAISSfrom langchain_core.documentsimportDocumentfrom langchain_openai importOpenAIEmbeddingsfrom langchain_community.graphsimportNeo4jGraphfrom langchain_experimental.graph_transformersimportLLMGraphTransformerfrom langchain_community.chat_modelsimportChatOllamafrom langchain_community.vectorstoresimportNeo4jVectorfrom langchain_core.promptsimportChatPromptTemplatefrom pydantic importBaseModel, Fieldfrom langchain_core.runnablesimportRunnablePassthroughfrom langchain_core.output_parsersimportStrOutputParser配置neo4j的连接graph Neo4jGraph( url bolt://44.204.252.192 , usernameneo4j, #default passwordquarterdeck-gross-dials #change accordingly)使用OpenAI将文本转换为Graph将文本转换为documenttext Marie Curie, born in 1867, was a Polish and naturalised-French physicist and chemist who conducted pioneering research on radioactivity.She was the first woman to win a Nobel Prize, the first person to win a Nobel Prize twice, and the only person to win a Nobel Prize in two scientific fields.Her husband, Pierre Curie, was a co-winner of her first Nobel Prize, making them the first-ever married couple to win the Nobel Prize and launching the Curie family legacy of five Nobel Prizes.She was, in 1906, the first woman to become a professor at the University of Paris.documents [Document(page_contenttext)]加载大模型将文本转换为graphllm ChatOpenAI(temperature0, model_namegpt-4-turbo,api_keysk-FgKk2OO5RYzYRJEf7eaMytOLsuIbZecGxaJvRnWDg1GCIkNh)llm_transformer_filtered LLMGraphTransformer(llmllm)graph_documents llm_transformer_filtered.convert_to_graph_documents(documents)graph_documents的内容如下[GraphDocument(nodes[Node(idMarie Curie, typePerson, properties{}), Node(idPierre Curie, typePerson, properties{}), Node(idUniversity Of Paris, typeOrganization, properties{}), Node(idNobel Prize, typeAward, properties{})], relationships[Relationship(sourceNode(idMarie Curie, typePerson, properties{}), targetNode(idNobel Prize, typeAward, properties{}), typeWINNER, properties{}), Relationship(sourceNode(idMarie Curie, typePerson, properties{}), targetNode(idUniversity Of Paris, typeOrganization, properties{}), typePROFESSOR, properties{}), Relationship(sourceNode(idPierre Curie, typePerson, properties{}), targetNode(idNobel Prize, typeAward, properties{}), typeCO-WINNER, properties{})], sourceDocument(metadata{}, page_content\nMarie Curie, born in 1867, was a Polish and naturalised-French physicist and chemist who conducted pioneering research on radioactivity.\nShe was the first woman to win a Nobel Prize, the first person to win a Nobel Prize twice, and the only person to win a Nobel Prize in two scientific fields.\nHer husband, Pierre Curie, was a co-winner of her first Nobel Prize, making them the first-ever married couple to win the Nobel Prize and launching the Curie family legacy of five Nobel Prizes.\nShe was, in 1906, the first woman to become a professor at the University of Paris.\n))]将生成的graph存储在neo4jgraph.add_graph_documents( graph_documents, baseEntityLabelTrue, include_sourceTrue )为了复杂查询在neo4j中创建embeddingembed OpenAIEmbeddings(modeltext-embedding-3-large,base_urlhttps://xiaoai.plus/v1,api_keysk-FgKk2OO5RYzYRJEf7eaMytOLsuIbZecGxaJvRnWDg1GCIkNh)vector_index Neo4jVector.from_existing_graph( embeddingembed, search_typehybrid, node_labelDocument, text_node_properties[text], embedding_node_propertyembedding, urlbolt://44.204.252.192, usernameneo4j, #default passwordquarterdeck-gross-dials #change accordingly)vector_retriever vector_index.as_retriever()此时在neo4j中可以看到如下数据{ identity: 0,labels: [ Document ],properties: { id: df48cdafbdaada2de04aaeb7c6a271a0, text: Marie Curie, born in 1867, was a Polish and naturalised-French physicist and chemist who conducted pioneering research on radioactivity....., embedding: [ 0.013757660053670406, -0.035230763256549835, -0.014454838819801807, ... ] },elementId: 4:56545626-8926-4df0-bdb3-73bbd4de10d6:0}{identity: 1,labels: [ Person, __Entity__ ],properties: { id: Marie Curie },elementId: 4:56545626-8926-4df0-bdb3-73bbd4de10d6:1}在neo4j中查询实体一旦我们将graph存储在了neo4j中我们可以提取用户问题中的实体 并在graph中查找相关的实体及其关系定义从文本中提取实体的模型class Entities(BaseModel): names: list[str] Field(..., descriptionAll entities from the text)定义提取实体的提示词prompt ChatPromptTemplate.from_messages([ (system, Extract organization and person entities from the text.), (human, Extract entities from: {question}) ])结合提示词和llm创建提取实体的链输出结果将是一个结构化的匹配实体的模型entity_chain prompt | llm.with_structured_output(Entities, include_rawTrue)response entity_chain.invoke({question: Who are Marie Curie and Pierre Curie?})entities response[raw].tool_calls[0][args][names]response 内容如下{raw: AIMessage(content, additional_kwargs{tool_calls: [{id: chatcmpl-WKYa1IBDY3cBqBgp8JbP6KtvlHniV, function: {arguments: {names:[Marie Curie,Pierre Curie]}, name: Entities}, type: function}], refusal: None}, response_metadata{token_usage: {completion_tokens: 13, prompt_tokens: 72, total_tokens: 85, completion_tokens_details: None, prompt_tokens_details: None}, model_name: gpt-4-turbo, system_fingerprint: fp_5b26d85e12, finish_reason: stop, logprobs: None}, idrun-41e2ac51-9573-4366-bc80-3080bd464fa6-0, tool_calls[{name: Entities, args: {names: [Marie Curie, Pierre Curie]}, id: chatcmpl-WKYa1IBDY3cBqBgp8JbP6KtvlHniV, type: tool_call}], usage_metadata{input_tokens: 72, output_tokens: 13, total_tokens: 85, input_token_details: {}, output_token_details: {}}), parsed: Entities(names[Marie Curie, Pierre Curie]), parsing_error: None}迭代提取的实体在neo4j数据库中查询其关联实体及关系graph_data for entity in entities: query_response graph.query( MATCH (p:Person {id: $entity})-[r]-(e) RETURN p.id AS source_id, type(r) AS relationship, e.id AS target_id LIMIT 50, {entity: entity} ) graph_data \n.join([f{el[source_id]} - {el[relationship]} - {el[target_id]} for el in query_response])graph_datagraph_data 内容如下Marie Curie - WINNER - Nobel PrizeMarie Curie - PROFESSOR - University Of ParisPierre Curie - CO-WINNER - Nobel Prize使用向量搜索vector_data [el.page_content for el in vector_retriever.invoke( Who are Marie Curie and Pierre Curie?)]vector_datavector_data内容如下[\ntext: \nMarie Curie, born in 1867, was a Polish and naturalised-French physicist and chemist who conducted pioneering research on radioactivity.\nShe was the first woman to win a Nobel Prize, the first person to win a Nobel Prize twice, and the only person to win a Nobel Prize in two scientific fields.\nHer husband, Pierre Curie, was a co-winner of her first Nobel Prize, making them the first-ever married couple to win the Nobel Prize and launching the Curie family legacy of five Nobel Prizes.\nShe was, in 1906, the first woman to become a professor at the University of Paris.\n]结合图搜索和向量搜索结果生成回答context fGraph data: {graph_data}\nVector data: {#Document .join(vector_data)}定义提示词模板为了基于上下文生成回答template Answer the question based only on the following context:{context}Question: {question}Answer:使用模板创建提示词这将采用上下文和提问作为输入prompt ChatPromptTemplate.from_template(template)创建处理链:使用上述生成的结果作为上下文输入应用提示词模板生成最终问题使用llm生成回答使用StrOutputParser格式化输出为字符串chain ( { context: lambda input: context, # Generate context from the question question: RunnablePassthrough(), # Pass the question through without modification } | prompt # Apply the prompt template | llm # Use the language model to answer the question based on context | StrOutputParser() # Parse the models response as a string )当输入问题Who are Marie Curie and Pierre Curie?最终结果如下Marie Curie was a Polish and naturalised-French physicist and chemist known for her research on radioactivity. She was the first woman to win a Nobel Prize, the first person to win it twice, and the only person to win in two scientific fields. She also became the first woman professor at the University of Paris. Pierre Curie, her husband, was a co-winner of her first Nobel Prize. Together, they were the first married couple to win the Nobel Prize.二、结果比较不使用graphRGA的输出结果llm ChatOpenAI(temperature0, model_namegpt-4-turbo,base_urlhttps://xiaoai.plus/v1,api_keysk-FgKk2OO5RYzYRJEf7eaMytOLsuIbZecGxaJvRnWDg1GCIkNh)response llm.invoke(Who are Marie Curie and Pierre Curie?)print(response) plaintext Marie Curie and Pierre Curie were a married couple who were both pioneering scientists in the field of radioactivity. Marie Curie, originally from Poland, was the first woman to win a Nobel Prize and the only person to win Nobel Prizes in two different scientific fields, physics and chemistry. Pierre Curie was a French physicist who made significant contributions to the study of crystallography, magnetism, and radioactivity. Together, they discovered the elements polonium and radium, and conducted groundbreaking research on the properties of radioactive materials. Their work laid the foundation for the development of nuclear physics and the use of radiation in medicine.使用基于向量的RAG的输出结果text Marie Curie, born in 1867, was a Polish and naturalised-French physicist and chemist who conducted pioneering research on radioactivity.She was the first woman to win a Nobel Prize, the first person to win a Nobel Prize twice, and the only person to win a Nobel Prize in two scientific fields.Her husband, Pierre Curie, was a co-winner of her first Nobel Prize, making them the first-ever married couple to win the Nobel Prize and launching the Curie family legacy of five Nobel Prizes.She was, in 1906, the first woman to become a professor at the University of Paris.docs [Document(page_contenttext)]embeddings OpenAIEmbeddings(modeltext-embedding-3-largeapi_keysk-FgKk2OO5RYzYRJEf7eaMytOLsuIbZecGxaJvRnWDg1GCIkNh)# Create FAISS vector storevectorstore FAISS.from_documents(docs, embeddings)# Save and reload the vector storevectorstore.save_local(faiss_index_)persisted_vectorstore FAISS.load_local(faiss_index_, embeddings, allow_dangerous_deserializationTrue)# Create a retrieverretriever persisted_vectorstore.as_retriever()result qa.invoke(Who are Marie Curie and Pierre Curie?)print(result) plaintext Marie Curie was a Polish and naturalised-French physicist and chemist known for her research on radioactivity. She was the first woman to win a Nobel Prize, the first person to win twice, and the only person to win in two different scientific fields. Pierre Curie was her husband and a co-winner of her first Nobel Prize. 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