本文实例讲述了Python数据操作方法封装类。分享给大家供大家参考，具体如下：
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：
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#!/usr/bin/env python# -*- coding:utf-8 -*-# Author:Eric.yueimport loggingimport MySQLdbclass _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', '123456', '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() |
希望本文所述对大家Python程序设计有所帮助。
