quick fix

the_server_handler.py

@@ -128,9 +128,9 @@ def query_once_fetch_lda(
         }
         r.execute(*execute_settings)
 
-        if isinstance(fetch_many, fn):
+        if isinstance(fetch_many, str):
             return rf[fetch_many]()
-        if isinstance(fetch_many, Collection[fn]):
+        if isinstance(fetch_many, Collection):
             return tuple(rf[i]() for i in fetch_many)
         raise AttributeError(
             f"please put one of the one, many, all, warnings in ty (you put {fetch_many})",