Update app.py

app.py

@@ -217,8 +217,10 @@ with gr.Blocks(theme=gr.themes.Soft(), css=css) as demo:
         imgs, page, total = render_page(date, page + delta, 6)
         return imgs, page, f"Page {page+1} / {total}"
 
-    prev_btn.click(nav, [-1, current_date, page_state], [gallery, page_state, page_info])
-    next_btn.click(nav, [1, current_date, page_state], [gallery, page_state, page_info])
+    prev_btn.click(    lambda d, p: nav(-1, d, p),    inputs=[current_date, page_state],    outputs=[gallery, page_state, page_info],)
+
+    next_btn.click(    lambda d, p: nav(1, d, p),    inputs=[current_date, page_state],    outputs=[gallery, page_state, page_info],)
+
 
     gr.HTML("<div id='ohamlab-footer'>© OhamLab</div>")