I solved this problem by this way: clear echarts instance first, then setOption with custom title option (without series data and hide axis line). By the way, you can add background to the option.
con = cx_Oracle.connect('scott/tiger@localhost:1512/ORCLPDB1', encoding="UTF-8")cursor = con.cursor()cursor.execute("CREATE TABLE t (id NUMBER, script CLOB, script_hash RAW(32))")