Importações básicas
import os
Loader de documentos PDF
from langchain_community.document_loaders import PyPDFLoader
Divisão de texto em blocos
from langchain_text_splitters import RecursiveCharacterTextSplitter
Embeddings
from langchain_openai import OpenAIEmbeddings
Banco vetorial
from langchain_community.vectorstores import Chroma
LLM
from langchain_openai import ChatOpenAI
Cadeia RAG
from langchain.chains import RetrievalQA
ModuleNotFoundError Traceback (most recent call last)
/tmp/ipykernel_8471/874190645.py in <cell line: 0>()
18
19 # Cadeia RAG
---> 20 from langchain.chains import RetrievalQA
ModuleNotFoundError: No module named 'langchain.chains'
