如何刷新wxpython中的Grid类？

import wx
import wx.grid as gridlib

class MyGrid(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, title="Grid Refresh Example")

        # 创建Grid对象
        self.grid = gridlib.Grid(self)

        # 设置Grid的列数和行数
        self.grid.CreateGrid(5, 5)

        # 设置Grid的列标签和行标签
        for col in range(5):
            self.grid.SetColLabelValue(col, f"Col {col+1}")
        for row in range(5):
            self.grid.SetRowLabelValue(row, f"Row {row+1}")

        # 设置Grid的初始数据
        for row in range(5):
            for col in range(5):
                self.grid.SetCellValue(row, col, f"Cell {row+1}-{col+1}")

        # 创建一个按钮，用于刷新Grid
        self.refresh_button = wx.Button(self, label="Refresh Grid")
        self.refresh_button.Bind(wx.EVT_BUTTON, self.on_refresh_button_click)

        # 创建一个垂直布局管理器，并将Grid和按钮添加到布局中
        self.sizer = wx.BoxSizer(wx.VERTICAL)
        self.sizer.Add(self.grid, 1, wx.EXPAND)
        self.sizer.Add(self.refresh_button, 0, wx.ALIGN_CENTER)

        # 将布局管理器应用到窗口
        self.SetSizer(self.sizer)

    def on_refresh_button_click(self, event):
        # 更新Grid的数据
        for row in range(5):
            for col in range(5):
                self.grid.SetCellValue(row, col, f"Updated {row+1}-{col+1}")

        # 刷新Grid的显示
        self.grid.Refresh()

if __name__ == "__main__":
    app = wx.App()
    frame = MyGrid()
    frame.Show()
    app.MainLoop()