#coding:utf-8import wxlabels=‘1 2 3 4 5 6 7 8 9 ‘.split()class TestFrame(wx.Frame):    def __init__(self):        wx.Frame.__init__(self,None,-1,‘grid sizer‘)        panel=wx.Panel(self,-1)                sizer=wx.GridBagSizer(hgap=5,vgap=5)        for col in range(3):            for row in range(3):                button=wx.Button(panel,label=labels[row*3+col])                sizer.Add(button,pos=(row,col))        #跨行                bt=wx.Button(panel,label=‘sapn 3 rows‘)        sizer.Add(bt,pos=(0,3),span=(3,1),flag=wx.EXPAND)        #跨列        bt=wx.Button(panel,label=‘span all columns‘)        sizer.Add(bt,pos=(3,0),span=(1,4),flag=wx.EXPAND)        #使最后的行和列可增长        sizer.AddGrowableCol(3)        sizer.AddGrowableRow(3)                panel.SetSizer(sizer)        sizer.Fit(self)        app=wx.App(False)TestFrame().Show()app.MainLoop()