wxNotebook关闭按钮？

import wx
import wx.lib.agw.flatnotebook as FNB

class MyFrame(wx.Frame):
    def __init__(self, parent):
        wx.Frame.__init__(self, parent, -1, "FlatNotebook Demo")

        # Create the FlatNotebook
        self.nb = FNB.FlatNotebook(self, -1, agwStyle=FNB.FNB_X_ON_TAB)

        # Add some pages to the notebook
        self.nb.AddPage(wx.Panel(self.nb), "Page 1")
        self.nb.AddPage(wx.Panel(self.nb), "Page 2")
        self.nb.AddPage(wx.Panel(self.nb), "Page 3")

        # Set the size of the frame
        self.SetSize((300, 200))

app = wx.App()
frame = MyFrame(None)
frame.Show(True)
app.MainLoop()

pip install wxPython-phoenix

pip install -U wxPython