wxpython怎么设置禁止改变窗口大小啊？

Question

# 主窗口类MainWindow
class MainWindow(wx.Frame):
    def __init__(self):
        super().__init__(None, title="成绩分析", size=(300, 530))
        panel = wx.Panel(parent=self)
        self.statictext = wx.StaticText(parent=panel, label="请单击按钮")
        b1 = wx.Button(parent=panel, id=10, label='分析Excel文件')
        b2 = wx.Button(parent=panel, id=11, label='Button2')
        b3 = wx.Button(parent=panel, id=12, label='Button3')