`#创建数据库
import pymysql
db =pymysql.connect(host='localhost',user='root',password='Lwq020330',database="xinji_inf",charset='utf8')

使用cursor()方法创建一个游标对象

cursor = db.cursor()

如果存在则删除

cursor.execute("DROP TABLE IF EXISTS AccountPassword")
sql ="""
CREATE TABLE AccountPassword(
class VARCHAR(50) NOT NULL,
name VARCHAR(50) NOT NULL,
number VARCHAR(50) NOT NULL
)
"""

执行sql语句

cursor.execut
import pymysql
import wx
class MyFrame(wx.Frame):
def init(self,parent,id):
wx.Frame.init(self,parent,id,'班级信息收集',size=(400,300))
#创建面板
panel = wx.Panel(self)

#创建“保存”和“查询”按钮，并绑定事件
    self.bt_storage = wx.Button(panel,label="保存")
    self.bt_storage.Bind(wx.EVT_BUTTON,self.OnclickStorage)
    self.bt_inquire = wx.Button(panel,label ='查询')
    self.bt_inquire.Bind(wx.EVT_BUTTON,self.OnclickInquire)
    #创建文本，左对齐
    self.title =wx.StaticText(panel,label ="保存信息请输入用户的学号班级和姓名\n\t查询请输入姓名或学号")
    self.label_class =wx.StaticText(panel,label ="班级：")
    self.text_class =wx.TextCtrl(panel,style =wx.TE_LEFT)
    self.label_user =wx.StaticText(panel,label ="姓名：")
    self.text_user =wx.TextCtrl(panel,style =wx.TE_LEFT)
    self.label_number = wx.StaticText(panel,label ="学号：")
    self.text_number = wx.TextCtrl(panel,style =wx.TE_LEFT)
    #添加容器，容器中控件横向排列
    hsizer_class =wx.BoxSizer(wx.HORIZONTAL)
    hsizer_class.Add(self.label_class,proportion=0,flag=wx.ALL,border=5)
    hsizer_class.Add(self.text_class,proportion=1,flag=wx.ALL,border=5)
    hsizer_user = wx.BoxSizer(wx.HORIZONTAL)
    hsizer_user.Add(self.label_user,proportion=0,flag=wx.ALL,border=5)
    hsizer_user.Add(self.text_user,proportion=1,flag =wx.ALL,border=5)
    hsizer_number =wx.BoxSizer(wx.HORIZONTAL)
    hsizer_number.Add(self.label_number,proportion=0,flag=wx.ALL,border=5)
    hsizer_number.Add(self.text_number,proportion=1,flag=wx.ALL,border=5)
    hsizer_button =wx.BoxSizer(wx.HORIZONTAL)
    hsizer_button.Add(self.bt_storage,proportion=0,flag=wx.ALIGN_CENTER,border=5)
    hsizer_button.Add(self.bt_inquire,proportion=0,flag=wx.ALIGN_CENTER,border=5)
    #添加容器，容器中的控件纵向排列
    vsizer_all = wx.BoxSizer(wx.VERTICAL)
    vsizer_all.Add(self.title,proportion=0,flag=wx.BOTTOM |wx.TOP |wx.ALIGN_CENTER,border=15)
    vsizer_all.Add(hsizer_class,proportion=0,flag=wx.EXPAND |wx.LEFT |wx.RIGHT,border=45)
    vsizer_all.Add(hsizer_user,proportion=0,flag=wx.EXPAND |wx.LEFT |wx.RIGHT,border=45)
    vsizer_all.Add(hsizer_number,proportion=0,flag=wx.EXPAND |wx.LEFT |wx.RIGHT,border=45)
    vsizer_all.Add(hsizer_button,proportion=0,flag=wx.ALIGN_CENTER |wx.TOP,border=15)
    panel.SetSizer(vsizer_all)
    
def OnclickStorage(self,event):
    "单击保存按钮"
    #连接数据库
    db =pymysql.connect(host='localhost',user='root',password='Lwq020330',database="xinji_inf",charset='utf8')
    message =""
    classname =self.text_class.GetValue()                   #获取输入的班级
    username =self.text_user.GetValue()                     #获取输入的用户名
    number =self.text_number.GetValue()                     #获取输入的学号
    #使用cursor()方法创建一个游标对象
    cursor = db.cursor()
    #判断是否为空
    if classname =="" or username =="" or number =="":
        message ='班级或名字或密码不能为空'
    else:
        
        #数据列表
        data = [(classname,username,number)]
        try:
            #执行sql语句，插入数据
            sql="insert into accountpassword(class, name, number) values(%s,%s,%s)"
            cursor.executemany(sql,data)
            #提交数据
            db.commit()
        except:
            #发生错误时回滚
            db.rollback()
            #关闭连接
            db.close()
            message ='保存成功'                                   #用户名或密码错误
    wx.MessageBox(message)                                   #弹出提示框
    
def OnclickInquire(self,event):
    "单击查询按钮"
    username =self.text_user.GetValue()                     #获取输入的用户名
    number =self.text_number.GetValue()                     #获取输入的学号
    db =pymysql.connect(host='localhost',user='root',password='Lwq020330',database="xinji_inf",charset='utf8')
    #使用cursor()方法创建一个游标对象
    cursor = db.cursor()
    sql =""
    message =""
    if username and number:
        sql ="SELECT * FROM ACCOUNTPASSWORD \
              WHERE NUMBER = %s"                              #查找学号
        try:
            #执行sql语句
            cursor.execute(sql,number)
            #获取记录
            results =cursor.fetchall()
            if results:
                for row in results:
                    classname = row[0]
                    username_sql =row[1]
                    number_sql =row[2]
        except:
            print("Error: unable to fecth data")
        if username_sql == username:
            message ="班级：{}\n姓名：{}\n学号：{}\n".format(classname,username_sql,number_sql)
        else:
            message ="姓名与学号不匹配"
    elif username:
        sql ="SELECT * FROM ACCOUNTPASSWORD \
              WHERE NAME = %s"                               #找到该名字
        try:
            #执行sql语句
            cursor.execute(sql,username)
            #获取记录
            results =cursor.fetchall()
            if results:                                      #若找到不为空，输出对应的信息
                for row in results:
                    classname = row[0]
                    username =row[1]
                    number =row[2]
                message ="班级：{}\n姓名：{}\n学号：{}\n".format(classname,username,number)
            else:
                message ="没有这个名字"
        except:
            print("Error: unable to fecth data")              #数据错误--
    elif number:
        sql ="SELECT * FROM ACCOUNTPASSWORD \
              WHERE NUMBER = %s"                              #查找学号，同上
        try:
            #执行sql语句
            cursor.execute(sql,number)
            #获取记录
            results =cursor.fetchall()
            if results:
                for row in results:
                    classname = row[0]
                    username =row[1]
                    number =row[2]
                message ="班级：{}\n姓名：{}\n学号：{}\n".format(classname,username,number)
            else:
                message ="没有这个学号"
        except:
            print("Error: unable to fecth data")
    else:
        message ="班级或名字或密码不能为空"
    #关闭数据库
    db.close()
    wx.MessageBox(message)

if name =='main':
app = wx.App() #初始化应用
frame = MyFrame(parent=None, id=-1) #实例MyFrame类，并传递参数
frame.Show() #显示窗口
app.MainLoop() #调用主循环方法
`