Update app.py

app.py

@@ -123,7 +123,7 @@ with gr.Blocks(theme=gr.themes.Default()) as demo:
     with gr.Tab("Indexig"):
         # pdf_input = gr.File(label="Upload PDF", file_types=[".pdf"])
         # pdf_input = gr.Textbox(label="PDF input")
-        pdf_input = gr.Files(file_count="multiple", file_types=["pdf"], interactive=True, label="Upload PDF documents")
+        pdf_input = gr.File(file_count="single", file_types=[".pdf"], label="Upload PDF documents")
         index_button = gr.Button("Index PDF")
         load_sample = gr.Button("Alternatively, Load and Index [Attention Is All You Need.pdf] as a Sample")
         sample_description = gr.Markdown("This sample PDF is a seminal paper in the field of machine learning, titled 'Attention Is All You Need' at https://arxiv.org/abs/1706.03762. It introduces the Transformer model, which has become foundational in natural language processing.")