change pd append to pd concat

pages/Ranking.py

@@ -119,7 +119,7 @@ class RankingApp:
         prompt_tags, tag, prompt_id, items = self.sidebar()
         batch_num = len(items) // self.batch_size
         batch_num += 1 if len(items) % self.batch_size != 0 else 0
-        
+
         st.session_state.counter[prompt_id] = 0 if prompt_id not in st.session_state.counter else st.session_state.counter[prompt_id]
 
         # save prompt_id in session state
@@ -223,7 +223,9 @@ if __name__ == "__main__":
             # only select the part of the promptbook where tag is the same as st.session_state.selected_dict.keys(), while model version ids are the same as corresponding values to each key
             promptBook_selected = pd.DataFrame()
             for key, value in st.session_state.selected_dict.items():
-                promptBook_selected = promptBook_selected.append(promptBook[(promptBook['prompt_id'] == key) & (promptBook['modelVersion_id'].isin(value))])
+                # promptBook_selected = promptBook_selected.append(promptBook[(promptBook['prompt_id'] == key) & (promptBook['modelVersion_id'].isin(value))])
+                # replace append with pd.concat
+                promptBook_selected = pd.concat([promptBook_selected, promptBook[(promptBook['prompt_id'] == key) & (promptBook['modelVersion_id'].isin(value))]])
             promptBook_selected = promptBook_selected.reset_index(drop=True)
             # st.write(promptBook_selected)
             images_endpoint = "https://modelcofferbucket.s3-accelerate.amazonaws.com/"