python操作mysql數據庫

#!/usr/bin/env python
#   --coding = utf-8
#   Author Allen Lee
import pymysql
#創建鏈接對象
conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='123', db='Allen')
#創建遊標
cursor = conn.cursor()
#執行sql，更新單條數據，並返回受影響行數
effect_row = cursor.execute("update hosts set host = '1.1.1.2'")
#插入多條，並返回受影響的函數
effect_row = cursor.executemany("insert into hosts(host,color_id)values(%s,%s)",[("1.0.0.1",1,),("10.0.0.3",2)])
#獲取最新自增ID
new_id = cursor.lastrowid
#查詢數據
cursor.execute("select * from hosts")
#獲取一行
row_1 = cursor.fetchone()
#獲取多(3)行
row_2 = cursor.fetchmany(3)
#獲取所有
row_3 = cursor.fetchall()
#重設遊標類型爲字典類型
cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
#提交，保存新建或修改的數據
conn.commit()
#關閉遊標
cursor.close()
#關閉連接
conn.close()