将wxpython按钮背景颜色设为默认值

import wx

class MyFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, title="wxPython Button Example")
        
        panel = wx.Panel(self)
        
        button = wx.Button(panel, label="Click me!")
        button.Bind(wx.EVT_BUTTON, self.on_button_click)
        
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(button, 0, wx.ALL, 10)
        panel.SetSizerAndFit(sizer)
        
    def on_button_click(self, event):
        button = event.GetEventObject()
        button.SetBackgroundColour(None)  # 将按钮的背景颜色设为默认值

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