wxPython grid

import wx
import wx.grid
import mariadb
 
class ImageRenderer(wx.grid.GridCellRenderer):
    def __init__(self, image):
        wx.grid.GridCellRenderer.__init__(self)
        self.image = image
 
    def Draw(self, grid, attr, dc, rect, row, col, isSelected):
        width = self.image.GetWidth()
        height = self.image.GetHeight()
        dc.SetBackgroundMode(wx.SOLID)        
        tmp_dc = wx.MemoryDC()
        tmp_dc.SelectObject(self.image)        
        if isSelected:
            dc.SetBrush(wx.Brush(wx.BLUE, wx.SOLID))
            dc.SetPen(wx.Pen(wx.BLUE, 1, wx.SOLID))
        else:
            dc.SetBrush(wx.Brush(wx.WHITE, wx.SOLID))
            dc.SetPen(wx.Pen(wx.WHITE, 1, wx.SOLID))
        dc.DrawRectangle(rect)
        if width > rect.width-2:
            width = rect.width-2
        if height > rect.height-2:
            height = rect.height-2
        dc.Blit(rect.x + 1, rect.y + 1, width, height, tmp_dc, 0, 0, wx.COPY, True)
 
 
class MainFrame(wx.Frame):
    def __init__(self, parent):
        super(MainFrame, self).__init__(parent)
        self.grid = wx.grid.Grid(self)
        self.upload_button = wx.Button(self, label="Feltölt")
        self.save_button = wx.Button(self, label="Mentés")
 
        self.initUI()
        self.initLayout()
 
    def initUI(self):        
        self.grid.CreateGrid(3, 3)
        self.grid.SetColLabelValue(0, "Név")
        self.grid.SetColLabelValue(1, "Település")
        self.grid.SetColLabelValue(2, "Kép")
        self.upload_button.Bind(wx.EVT_BUTTON, self.click_upload_button)
        self.save_button.Bind(wx.EVT_BUTTON, self.click_save_button)
 
    def initLayout(self):
        root_box = wx.BoxSizer(wx.VERTICAL)
        button_box = wx.BoxSizer(wx.HORIZONTAL)        
        root_box.Add(self.grid)
        root_box.Add(button_box)        
        button_box.Add(self.upload_button)
        button_box.Add(self.save_button)        
        self.SetSizer(root_box)
        self.Layout()
 
    def click_upload_button(self, event):
        file_dialog = wx.FileDialog(self)
        if file_dialog.ShowModal() == wx.ID_OK:
            self.selected_file = file_dialog.GetPath();
            self.set_image()
        file_dialog.Destroy()
 
    def click_save_button(self, event):
        self.save_to_database()
 
    def set_image(self):
        selection = []
        selection += self.grid.GetSelectedRows()
        print(selection)
        image = wx.Bitmap(self.selected_file, wx.BITMAP_TYPE_ANY)
        imageRenderer = ImageRenderer(image)
        self.grid.SetCellRenderer(int(selection[0]),2,imageRenderer)
        self.SetTitle('Kép beállítva')
 
    def save_to_database(self):
        config = {
            'host': 'localhost',
            'user': 'test04',
            'password': '12345'
        }
        conn = mariadb.connect(**config, database='test04')
        cur = conn.cursor()
        fp = open(self.selected_file, 'rb').read()
        sql = 'insert into tabla1(kep) values(%s)'
        args = (fp,)
        cur.execute(sql, args)
        conn.commit()
        conn.close()
        self.SetTitle('Mentés adatbázisba kész')
 
class SimpleApp(wx.App):
    def OnInit(self):
        frame = MainFrame(None)
        frame.Show()
        return True
 
app = SimpleApp()
app.MainLoop()