Update app.py

app.py

@@ -45,7 +45,12 @@ with gr.Blocks() as demo:
     # Instead of ask students to provide key, the key is now directly provided by the instructor
     api_input = os.environ.get("OPENAI_API_KEY")
     embed_key(api_input, study_tutor)
-        
+
+    with gr.Tab("Instructor Only"): 
+        file_input = gr.Files(label="Load a .txt or .pdf file",
+                            file_types=['.pdf', '.txt'], type="file",
+                            elem_classes="short-height")
+
     # Chatbot interface
     gr.Markdown("""
     ## Chat with the Model