Update app.py

app.py

@@ -34,9 +34,9 @@ def pdf_to_document_store(pdf_files):
 
 def summarize(files):
     pdf_to_document_store(files)
-    summary = summarizer.predict(documents=document_store.get_all_documents(), generate_single_summary=True)
+    summaries = summarizer.predict(documents=document_store.get_all_documents(), generate_single_summary=True)
     st.write('Summary')
-    st.write(summary['content'])
+    st.write(summaries[0]['content'])
 
 document_store, summarizer, preprocessor = start_haystack()