wxpython将行添加到TextCtrl

import wx

class MyFrame(wx.Frame):
    def __init__(self, parent, title):
        super(MyFrame, self).__init__(parent, title=title, size=(300, 200))
        
        panel = wx.Panel(self)
        sizer = wx.BoxSizer(wx.VERTICAL)
        
        self.text_ctrl = wx.TextCtrl(panel, style=wx.TE_MULTILINE)
        sizer.Add(self.text_ctrl, proportion=1, flag=wx.EXPAND)
        
        button = wx.Button(panel, label="添加行")
        button.Bind(wx.EVT_BUTTON, self.on_button_click)
        sizer.Add(button, flag=wx.ALIGN_CENTER)
        
        panel.SetSizer(sizer)
        self.Show(True)
    
    def on_button_click(self, event):
        new_line = "要添加的新行"
        text = self.text_ctrl.GetValue()
        text += "\n" + new_line
        self.text_ctrl.SetValue(text)

app = wx.App()
frame = MyFrame(None, "TextCtrl示例")
app.MainLoop()