Update app.py

app.py

@@ -1,4 +1,4 @@
-from langchain_community.document_loaders import PyPDFDirectoryLoader
+from langchain_community.document_loaders import PyPDFLoader
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain_community.embeddings import SentenceTransformerEmbeddings
 from langchain.vectorstores import Chroma
@@ -17,7 +17,7 @@ if api_key is None:
     raise ValueError("Hugging Face API key is not set. Please set it in your environment.")
 
 # Load documents from a directory
-loader = PyPDFDirectoryLoader("healthyheart.pdf")
+loader = PyPDFLoader("healthyheart.pdf")
 docs = loader.load()
 
 # Split documents into chunks