import wx

class MainFrame(wx.Frame):
    def __init__(self, parent):
        super(MainFrame, self).__init__(parent)
        self.InitUI()
        self.InitLayout()

    def InitUI(self):
        self.button1 = wx.Button(self, label='vmi')
        self.entry = wx.TextCtrl(self)

    def InitLayout(self):
        self.sizer1 = wx.BoxSizer(wx.VERTICAL)
        self.sizer1.Add(self.button1)
        self.sizer1.Add(self.entry)
        self.SetSizer(self.sizer1)