Update app.py

app.py

@@ -14,9 +14,9 @@ from fastapi.responses import HTMLResponse, JSONResponse
 from pydantic import BaseModel, Field
 import uvicorn
 
-from langchain.document_loaders import TextLoader
+from langchain_community.document_loaders import TextLoader
 from langchain.text_splitter import RecursiveCharacterTextSplitter
-from langchain.vectorstores import FAISS
+from langchain_community.vectorstores import FAISS
 from langchain.chains import RetrievalQA
 from langchain.prompts import PromptTemplate
 from langchain.callbacks.base import BaseCallbackHandler
@@ -59,7 +59,7 @@ class Config:
     CHUNK_OVERLAP = 100
     MAX_RETRIES = 3
     RATE_LIMIT_DELAY = 1.0
-    MODEL_NAME = "gemini-1.5-flash"
+    MODEL_NAME = "gemma-3-27b-it"
     EMBEDDING_MODEL = "models/embedding-001"
     TEMPERATURE = 0.5
     MAX_OUTPUT_TOKENS = 512