wxPython:制作一个固定高度的面板

import wx

class FixedHeightPanel(wx.Panel):
    def __init__(self, parent, height):
        super().__init__(parent)
        self.height = height

        sizer = wx.BoxSizer(wx.VERTICAL)
        self.SetSizer(sizer)

        self.panel = wx.Panel(self)
        self.panel.SetMinSize((-1, self.height))
        sizer.Add(self.panel, 0, wx.EXPAND)

        self.Layout()

app = wx.App()
frame = wx.Frame(None, title="Fixed Height Panel")
panel = FixedHeightPanel(frame, 200)
frame.Show()
app.MainLoop()