Update app.py

app.py

@@ -48,10 +48,10 @@ def load_wikipedia_documents():
         return []
 
 @st.cache_resource
-def split_documents(documents):
+def split_documents(_documents):
     """Split documents into chunks."""
     splitter = RecursiveCharacterTextSplitter(chunk_size=500, chunk_overlap=50)
-    chunks = splitter.split_documents(documents)
+    chunks = splitter.split_documents(_documents)
     logger.info(f"Split into {len(chunks)} chunks")
     return chunks
 
@@ -178,6 +178,8 @@ def main():
     if not documents:
         return
     chunks = split_documents(documents)
+    if not chunks:
+        return
     embeddings = initialize_embeddings()
     if embeddings is None:
         return