add api button

app.py

@@ -227,6 +227,7 @@ if __name__ == "__main__":
                         type="index",
                     )
                     open_domain_btn = gr.Button("Submit", variant="primary")
+                    api_classification_btn = gr.Button("API", variant="primary")
                 with gr.Column():
                     open_domain_output = gr.Label(
                         num_top_classes=k,
@@ -309,6 +310,12 @@ if __name__ == "__main__":
             outputs=[open_domain_output],
         )
 
+        api_classification_btn.click(
+            fn=api_classification,
+            inputs=[img_input, rank_dropdown],
+            outputs=[open_domain_output],
+        )
+
         zero_shot_btn.click(
             fn=zero_shot_classification,
             inputs=[img_input, classes_txt],