python MySQLdb 对mysql基本操作方法

 1 #!/usr/bin/env python
 2 # -*- coding:utf-8 -*-
 3 import MySQLdb
 4 
 5 conn = MySQLdb.connect(host=‘192.168.1.101‘,user=‘root‘,passwd=‘123‘,db=‘host‘)
 6 cur = conn.cursor(cursorclass=MySQLdb.cursors.DictCursor)
 7 reCout = cur.execute(‘select ip,name from host,user where user.name = "alex" and user.id=host.id‘)
 8 nRet = cur.fetchall()
 9 conn.commit()
10 cur.close()
11 conn.close()
12 print reCout
13 print nRet
14 for i in  nRet:
15     print i[‘name‘],i[‘ip‘]
16 
17 """
18 #修改
19 conn = MySQLdb.connect(host=‘192.168.1.101‘,user=‘root‘,passwd=‘123‘,db=‘host‘)
20 cur = conn.cursor()
21 reCout = cur.execute(‘update host set id=%s‘,(1,))
22 conn.commit()
23 cur.close()
24 conn.close()
25 print reCout
26 """
27 """
28 #删除
29 conn = MySQLdb.connect(host=‘192.168.1.101‘,user=‘root‘,passwd=‘123‘,db=‘host‘)
30 cur = conn.cursor()
31 reCout = cur.execute(‘delete from host‘)
32 conn.commit()
33 cur.close()
34 conn.close()
35 print reCout
36 """
37 """
38 l = [
39     (‘192.168.1.107‘,‘2‘),
40     (‘192.168.1.108‘,‘2‘),
41     (‘192.168.1.109‘,‘2‘),
42     (‘192.168.1.177‘,‘2‘),
43 ]
44 #插入多条数据
45 conn = MySQLdb.connect(host=‘192.168.1.101‘,user=‘root‘,passwd=‘123‘,db=‘host‘)
46 cur = conn.cursor()
47 reCout = cur.executemany(‘insert into host(ip,id) values(%s,%s)‘,l)
48 
49 conn.commit()
50 cur.close()
51 conn.close()
52 print reCout
53 """
54 """
55 #插入单条数据
56 conn = MySQLdb.connect(host=‘192.168.1.101‘,user=‘root‘,passwd=‘123‘,db=‘host‘)
57 cur = conn.cursor()
58 reCout = cur.execute(‘insert into host(ip,id) values(%s,%s)‘,(‘192.168.1.1‘,‘1‘))
59 
60 conn.commit()
61 cur.close()
62 conn.close()
63 print reCout
64 """