[Update]set to string for methods

app.py

@@ -63,7 +63,7 @@ def restart_space():
 # ) = get_evaluation_queue_df(EVAL_REQUESTS_PATH, EVAL_COLS)
 
 raw_data = dummydf()
-methods = list(set(raw_data['Method'].astype(str)))
+methods = list(set(str(raw_data['Method'])))
 metrics = ["Chruch","Parachute","Tench","Garbage Turch","Van Gogh","Violence","Illegal Activity","Nudity"]
 
 def update_table(