如何在wxPython 2.8中删除staticBoxSizer中的行？

import wx

class MyFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, title="删除staticBoxSizer中的行示例")

        # 创建一个垂直的staticBoxSizer
        sizer = wx.StaticBoxSizer(wx.VERTICAL, self, "示例staticBoxSizer")

        # 添加一些子窗口到staticBoxSizer中
        for i in range(5):
            label = wx.StaticText(self, label=f"行{i+1}")
            sizer.Add(label, 0, wx.ALL, 5)

        # 添加一个按钮，点击时删除第二行
        button = wx.Button(self, label="删除第二行")
        button.Bind(wx.EVT_BUTTON, self.on_delete_row)
        sizer.Add(button, 0, wx.ALL, 5)

        self.SetSizer(sizer)
        self.Fit()

    def on_delete_row(self, event):
        sizer = self.GetSizer()

        # 获取staticBoxSizer中的所有子窗口或子Sizer
        children = sizer.GetChildren()

        # 确定要删除的行的索引（这里删除第二行）
        row_index = 1

        if row_index < len(children):
            child = children[row_index]

            # 使用sizer的Remove方法将子窗口或子Sizer从staticBoxSizer中移除
            sizer.Remove(child.GetWindow())

            # 调用窗口的Destroy方法销毁子窗口
            child.GetWindow().Destroy()

            # 调用staticBoxSizer的Layout方法重新布局
            sizer.Layout()

app = wx.App()
frame = MyFrame()
frame.Show()
app.MainLoop()