请用python3.0编写一段代码能连接oracle，实现每日定时抽取

这是一段实现每日定时抽取oracle数据的python3.0代码：import cx_Oracle
import datetime

# 连接oracle
conn = cx_Oracle.connect('username/password@host:port/service_name')
cursor = conn.cursor()

# 执行sql语句
cur_date = datetime.date.today()
sql = "SELECT * FROM table_name WHERE date = '%s'" % cur_date
cursor.execute(sql)

# 获取结果
result = cursor.fetchall()

# 关闭游标和连接
cursor.close()
conn.close()