将matplotlib图拟合到wxpnel

import wx
import matplotlib.pyplot as plt
from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas

class MyPanel(wx.Panel):
    def __init__(self, parent):
        wx.Panel.__init__(self, parent)

        # 创建一个matplotlib图形
        fig = plt.figure()
        ax = fig.add_subplot(111)
        ax.plot([1, 2, 3, 4], [1, 4, 9, 16])

        # 创建一个FigureCanvas对象，并将其嵌入到面板中
        canvas = FigureCanvas(self, -1, fig)

    def DoLayout(self):
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.canvas, 1, wx.EXPAND)
        self.SetSizer(sizer)

class MyFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, title="Matplotlib in wxPython")
        panel = MyPanel(self)
        panel.DoLayout()

if __name__ == "__main__":
    app = wx.App(False)
    frame = MyFrame()
    frame.Show()
    app.MainLoop()