Update app.py

app.py

@@ -12,8 +12,9 @@ from langchain_community.embeddings import HuggingFaceEmbeddings
 from langchain_text_splitters import RecursiveCharacterTextSplitter
 from langchain_community.llms import HuggingFaceHub
 from langchain_core.runnables import RunnableParallel, RunnablePassthrough
-from langchain_core.document import Document
+from langchain_core.documents import Document
 huggingface_token = os.environ.get("HUGGINGFACE_TOKEN")
+
 def load_and_split_document_basic(file):
    """Loads and splits the document into pages."""
    loader = PyPDFLoader(file.name)