fn=disable_btn,

assignment_ui.py

@@ -40,7 +40,17 @@ def create_assignment_ui(user_data, assignment_service, submission_service):
                     def update_gr_assignment_id(assignment_data):
                         return assignment_data['assignment_id']
 
+                    def disable_btn():
+                        return gr.update(interactive=False)
+                    
+                    def enable_btn():
+                        return gr.update(interactive=True)
+
                     assignment_create_button.click(
+                        fn=disable_btn,
+                        inputs=[],
+                        outputs=[assignment_create_button]
+                    ).then(
                         assignment_service.create_assignment_metadata,
                         inputs=[
                             assignment_type, 
@@ -64,6 +74,11 @@ def create_assignment_ui(user_data, assignment_service, submission_service):
                         update_gr_assignment_id,
                         inputs=[assignment_data],
                         outputs=[assignment_id_display_teacher]
+                    ).then(
+                        # enable
+                        fn=enable_btn,
+                        inputs=[],
+                        outputs=[assignment_create_button]
                     )
         
         with gr.Tab("老師｜作業列表") as assignment_list_tab: