Update app.py

app.py

@@ -18,7 +18,7 @@ def get_backlinks(api_login, api_key, target_url, filters):
             "target": target_url,
             "limit": 1000,
             "mode": "as_is",
-            "filters": filters
+            "filters": [f"{filter[0]}:{filter[1]}:{filter[2]}" for filter in filters] if filters else []
         }
     }