Update app.py

app.py

@@ -11,16 +11,20 @@ Original file is located at
 import gradio as gr
 import os
 from dotenv import load_dotenv
-from langchain.chat_models import ChatOpenAI
-from langchain.document_loaders import PyPDFLoader
-from langchain.embeddings import HuggingFaceEmbeddings
-from langchain.vectorstores import FAISS
+
+# ✅ Imports corretos e atualizados para LangChain 0.1.14+
+from langchain_community.chat_models import ChatOpenAI
+from langchain_community.document_loaders import PyPDFLoader
+from langchain_community.embeddings import HuggingFaceEmbeddings
+from langchain_community.vectorstores import FAISS
+
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain.chains import RetrievalQA
 import tempfile
 import numpy as np
 from sklearn.metrics.pairwise import cosine_similarity
 
+
 # ✅ Carrega variáveis de ambiente
 load_dotenv()
 OPENROUTER_API_KEY = os.getenv("ROUTER_API_KEY")