Python的MySQL操作

一、相关代码

数据库配置类 MysqlDBConn.py

01 #encoding=utf-8
02 '''
03 Created on 2012-11-12
04
05 @author: Steven http://www.lifeba.org
06
07 Mysql Conn连接类
08 '''
09
10 import MySQLdb
11
12 class DBConn:
13
14     conn = None
15
16     #建立和数据库系统的连接
17     def connect(self):
18         self.conn = MySQLdb.connect(host="localhost",port=3306,user="house", passwd="house" ,db="house",charset="utf8")
19
20     #获取操作游标
21     def cursor(self):
22         try:
23             return self.conn.cursor()
24         except (AttributeError, MySQLdb.OperationalError):
25             self.connect()
26             return self.conn.cursor()
27
28     def commit(self):
29         return self.conn.commit()
30
31     #关闭连接
32     def close(self):
33         return self.conn.close()

 

MysqlDemo.py类

001 #encoding=utf-8
002 '''
003 Created on 2012-11-12
004
005 @author: Steven
006
007 http://www.lifeba.org
008
009 Mysql操作Demo
010 Done:创建表，删除表，数据增、删、改，批量插入
011 '''
012 import MysqlDBConn
013
014 dbconn = MysqlDBConn.DBConn()
015
016 def process():
017     #建立连接
018     dbconn.connect()
019     #删除表
020     dropTable()
021     #创建表
022     createTable()
023     #批量插入数据
024     insertDatas()
025     #单条插入
026     insertData()
027     #更新数据
028     updateData()
029     #删除数据
030     deleteData()
031     #查询数据
032     queryData()
033     #释放连接
034     dbconn.close()
035
036 def insertDatas():
037     sql = "insert into lifeba_users(name, realname, age) values(%s, %s, %s)"
038     tmp = (('steven1', '测试1',26), ('steven2', '测试2',25))
039     executemany(sql, tmp)
040
041 def updateData():
042     sql = "update lifeba_users set realname = '%s' where name ='steven1'"%("测试1修改")
043     execute(sql)
044
045 def deleteData():
046     sql = "delete from lifeba_users where id=2"
047     execute(sql)
048
049 def queryData():
050     sql = "select * from lifeba_users"
051     rows = query(sql)
052     printResult(rows)
053
054 def insertData():
055     sql = "insert into lifeba_users(name, realname, age) values('%s', '%s', %s)"%("steven3","测试3","26")
056     print sql
057     execute(sql)
058
059 def executemany(sql, tmp):
060     '''插入多条数据'''
061     conn=dbconn.cursor()
062     conn.executemany(sql, tmp)
063
064 def execute(sql):
065     '''执行sql'''
066     conn=dbconn.cursor()
067     conn.execute(sql)
068
069 def query(sql):
070     '''查询sql'''
071     conn=dbconn.cursor()
072     conn.execute(sql)
073     rows = conn.fetchmany(10)
074     return rows
075
076 def createTable():
077     '''创建表'''
078     conn=dbconn.cursor()
079     conn.execute('''
080     CREATE TABLE `lifeba_users` (
081       `ID` int(11) NOT NULL auto_increment,
082       `name` varchar(50) default NULL,
083       `realName` varchar(50) default NULL,
084       `age` int(11) default NULL,
085       PRIMARY KEY  (`ID`)
086     ) ENGINE=MyISAM DEFAULT CHARSET=utf8;
087     ''')
088 #    dbconn.commit()
089
090 def dropTable():
091     '''删除表'''
092     conn=dbconn.cursor()
093     conn.execute('''
094     DROP TABLE IF EXISTS `lifeba_users`
095     ''')
096 #    dbconn.commit()
097
098 def printResult(rows):
099     for row in rows:
100         for i in range(0,len(row)):#遍历数组
101             print row[i], #加, 不换行打印
102         print ''
103
104 if __name__ == '__main__':
105
106     process()

 

二、打包下载

python_mysql_lifeba.org_121114