用python操作mysql数据库（之代码归类）

9oijl1111

index.py 这里只是假设一个模拟登陆

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# -*- coding: utf-8 -*- """ Created on Sun Nov 27 18:54:29 2016 这是主程序文件 @author: toby """ from model.user import User def main():     username = "tantianran1"     user = User()     result = user.Check_Username(username)     if not result:         print '用户不存在，请重新登录'     else:         print '登录成功' if __name__ == "__main__":     main()

user.py

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# -*- coding: utf-8 -*- """ Created on Sun Nov 27 19:48:03 2016 对数据库表的处理,py文件名和表名一一对应 所以，在这里的user.py文件是对数据库表为user的处理 @author: toby """ import sys sys.path.append("/home/toby/workspace/date20161128") from utility.sql_helper import MysqlHelper class User(object):     def __init__(self):         self.__helper = MysqlHelper()     def Get_data_by_id(self,ids):         sql = "select * from user where id=%s"         params = (ids,)         return self.__helper.Get_One_Data(sql,params)     def Check_Username(self,name):         sql = "select * from user where name=%s"         params = (name,)         return self.__helper.Get_One_Data(sql,params) ''' a = User() print a.Check_Username('tantianran') '''

sql_helper.py

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# -*- coding: utf-8 -*- """ Created on Sun Nov 27 18:57:44 2016 数据处理层，处理数据的最底层，例如增删改查的功能 @author: toby """ import MySQLdb class MysqlHelper(object):     def __init__(self):         hosts,users,password,dbname = '127.0.0.1','root','1qaz#EDC','test_db'         self.conn = MySQLdb.connect(host=hosts,user=users,passwd=password,db=dbname)         self.cur = self.conn.cursor(MySQLdb.cursors.DictCursor)     def Get_Dict_data(self,sql,params):         self.cur.execute(sql,params)         data = self.cur.fetchall() #fetchall()获取所有数据         self.cur.close()         self.conn.close()         return data     def Get_One_Data(self,sql,params):         self.cur.execute(sql,params)         data = self.cur.fetchone() #fetchone()是获取一条数据         self.cur.close()         self.conn.close()         return data