Update app.py

app.py

@@ -178,7 +178,7 @@ for i in range(row_count):
     df_key = f"df_{i}"
     df = st.session_state.get(df_key)
     if df is not None:
-        dfs.append(df)  # Append DataFrame to the list for later use
+        dfs.append(df)  # Append DataFrame to the list
         csv = convert_df_to_csv(df)
         with col2:
             st.download_button(
@@ -215,6 +215,18 @@ if generate_button:
         url_id, df = results.get()
         st.session_state[f"df_{url_id}"] = df
 
+# Check if there's at least one DataFrame available for combined download
+if any(st.session_state.get(f"df_{i}") is not None for i in range(row_count)):
+    if st.sidebar.button("Download Combined CSV"):
+        combined_csv = concatenate_dfs([st.session_state.get(f"df_{i}") for i in range(row_count) if st.session_state.get(f"df_{i}") is not None])
+        st.sidebar.download_button(
+            label="Download Combined Data as CSV",
+            data=combined_csv,
+            file_name='combined_backlinks.csv',
+            mime='text/csv',
+            key="combined_download"  # Unique key for the combined download button
+        )
+
 # Combined CSV download logic - this should be outside of the for loop
 if dfs:
     combined_csv = concatenate_dfs(dfs)