python数据操作方法封装

工作中经常会用到数据的插叙、单条数据插入和批量数据插入，以下是本人封装的一个类，推荐给各位：

 #!/usr/bin/env python
 # -*- coding:utf-8 -*-
 # Author:Eric.yue

 import logging
 import MySQLdb
 class _MySQL(object):
     def __init__(self,host, port, user, passwd, db):
         self.conn = MySQLdb.connect(
             host = host,
             port = port,
             user = user,
             passwd = passwd,
             db = db,
             charset='utf8'
         )

     def get_cursor(self):
         return self.conn.cursor()

     def query(self, sql):
         cursor = self.get_cursor()
         try:
             cursor.execute(sql, None)
             result = cursor.fetchall()
         except Exception, e:
             logging.error("mysql query error: %s", e)
             return None
         finally:
             cursor.close()
         return result

     def execute(self, sql, param=None):
         cursor = self.get_cursor()
         try:
             cursor.execute(sql, param)
             self.conn.commit()
             affected_row = cursor.rowcount
         except Exception, e:
             logging.error("mysql execute error: %s", e)
             return 0
         finally:
             cursor.close()
         return affected_row

     def executemany(self, sql, params=None):
         cursor = self.get_cursor()
         try:
             cursor.executemany(sql, params)
             self.conn.commit()
             affected_rows = cursor.rowcount
         except Exception, e:
             logging.error("mysql executemany error: %s", e)
             return 0
         finally:
             cursor.close()
         return affected_rows

     def close(self):
         try:
             self.conn.close()
         except:
             pass

     def __del__(self):
         self.close()

 mysql = _MySQL('127.0.0.1', 3306, 'root', '', 'test')

 def create_table():
     table = """
             CREATE TABLE IF NOT EXISTS `watchdog`(
                 `id` int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY,
                 `name` varchar(100),
                 `price` int(11) NOT NULL DEFAULT 0
             ) ENGINE=InnoDB charset=utf8;
             """
     print mysql.execute(table)

 def insert_data():
     params = [('dog_%d' % i, i) for i in xrange(12)]
     sql = "INSERT INTO `watchdog`(`name`,`price`) VALUES(%s,%s);"
     print mysql.executemany(sql, params)

 if __name__ == '__main__':
     create_table()
     insert_data()