Python数据操作方法封装类 Python数据操作方法封装类实例
北京流浪儿 人气:0想了解Python数据操作方法封装类实例的相关内容吗,北京流浪儿在本文为您仔细讲解Python数据操作方法封装类的相关知识和一些Code实例,欢迎阅读和指正,我们先划重点:Python,数据操作,封装类,下面大家一起来学习吧。
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:
#!/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', '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。
加载全部内容