1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 from langchain.llms import Ollama from langchain.embeddings import OllamaEmbeddings from langchain.chains import RetrievalQA from langchain.vectorstores import FAISS from langchain.text_splitter import CharacterTextSplitter from langchain.document_loaders import TextLoader # 加载本地模型 llm = Ollama(model="llama2") embeddings = OllamaEmbeddings(model="llama2") # 加载