#coding=utf-8

import pymysql

# #查询

# def connMySQL():

# try:

# conn=pymysql.connect(‘localhost‘,‘root‘,‘admin‘)

# conn.select_db(‘five‘)

# except Exception as e:

# return e.args

# else:

# cur=conn.cursor()

# cur.execute("select * from users")

# data=cur.fetchall()

# # for item in data:

# # print(item)

# #列表推导式

# db=[item for item in data]

# print(db)

# # 打开之后进行关闭，不然会占用资源

# finally:

# cur.close()

# conn.commit()

# conn.close()

#

# print(connMySQL())

# #插入数据

# def insertMySql():

# try:

# conn=pymysql.connect(‘localhost‘,‘root‘,‘admin‘)

# conn.select_db(‘five‘)

# except Exception as e:

# return e.args

# else:

# cur=conn.cursor()

# #单条插入

# # sql=‘insert into users values (%s,%s,%s,%s)‘

# # params=(12,‘wei‘,99,‘changjiang‘)

# #多条插入

# sql = ‘insert into users values (%s,%s,%s,%s)‘

# params=[(13,‘wei‘,99,‘changjiang‘),(14,‘wei‘,99,‘changjiang‘),(15,‘wei‘,99,‘changjiang‘)]

# cur.executemany(sql,params)

# conn.commit()

# # 打开之后进行关闭，不然会占用资源

# finally:

# cur.close()

# conn.close()

#

# insertMySql()

#插入数据

# #删除数据

# def deleteMySql():

# try:

# conn=pymysql.connect(‘localhost‘,‘root‘,‘admin‘)

# conn.select_db(‘five‘)

# except Exception as e:

# return e.args

# else:

# cur=conn.cursor()

# #多条插入

# cur.execute = ‘delete * from users where id= 1‘

# conn.commit()

# # 打开之后进行关闭，不然会占用资源

# finally:

# cur.close()

# conn.close()

#

# deleteMySql()

class MySqlHelper:

def conn(self):

con=pymysql.connect(

host=‘127.0.0.1‘,

user=‘root‘,

passwd=‘admin‘,

db=‘aimin‘)

return con

def get_one(self,sql,params):

cur=self.conn().cursor()

data=cur.execute(sql,params)

result=cur.fetchone()

return result

def checkValid(username,password):

opera=MySqlHelper()

sql=‘select * from login where username=%s and password=%s‘

params=(username,password)

return opera.get_one(sql=sql,params=params)

def info():

username=input(‘请输入用户名：\n‘)

password=input(‘请输入密码：\n‘)

result=checkValid(username,password)

if result:

print(‘登录成功，昵称：{0}‘.format(username))

else:

print(‘失败‘)

if __name__==‘__main__‘:

info()

python对数据库mysql的操作(增删改查)

标签：username   passwd   man   __name__   cep   commit   inpu   and   数据

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