请问下在 Python 中如何将一个数组的值赋给另外一个数组

import MySQLdb

import numpy as np

conn = MySQLdb.connect(host='192.168.18.70',port = 3306,user='root',passwd='123456',db='st')

cur = conn.cursor()

conn.autocommit(1)

query_sql = "select id from st.baidu where created_at < date_sub(now(), interval 1 year);"

insert_sql = "insert ignore into tmp.baidu_bak (select * from st.baidu where id = %s);"

delete_sql = "delete from st.baidu where id = %s;"

cur.execute(query_sql)

aaa = cur.fetchall()

aaa = np.array(aaa)

for i in range(0,len(aaa)):

ids[i] = aaa[i]

if i%10000==0 :

cur.executemany(insert_sql,ids)

ids = null

我在 eclipse 写这段程序的时候，在第 16 行： ids[i] = aaa[i] 报错：
Undefined variable: ids

请问下在 Python 中如何将一个数组的值赋给另外一个数组？