Minor fix

app.py

@@ -6,6 +6,7 @@ from langchain_core.prompts import PromptTemplate
 from langchain_pinecone import PineconeVectorStore
 from langchain_community.vectorstores import FAISS
 from langchain_community.vectorstores import LanceDB
+from google.api_core.exceptions import ResourceExhausted
 from langchain_text_splitters import CharacterTextSplitter
 from langchain_community.document_loaders import PyPDFLoader
 from langchain_google_genai import GoogleGenerativeAIEmbeddings, GoogleGenerativeAI
@@ -23,7 +24,7 @@ prompt_template = """
 
 prompt = PromptTemplate(template = prompt_template, input_variables = ["context", "question"])
 
-chain = prompt | gemini
+chain = prompt | gemini.with_retry(retry_if_exception_type=(ResourceExhausted,))
 
 index_name = "langchain-test-index"