python更新数据库oracle中的datetime类型的数据，带参数

import cx_Oracle

conn = cx_Oracle.connect('数据库名字', '密码', '**', encoding='UTF-8')

cursor = conn.cursor()

number = '2020-09-08 11:29:18'

cursor.execute("update table set DATEcolumn = to_date('{number}' ,'yyyy-mm-dd hh:mi:ss')".format(number=number))

conn.commit()

cursor.close()

conn.close()