import wx

class Panel1(wx.Panel):
    def __init__(self, parent, id):
        wx.Panel.__init__(self, parent, id)
        
        btn = wx.Button(self, label='Mehet')

app = wx.App()
frame = wx.Frame(None, -1, 'Egy gomb', size=(400, 300))
Panel1(frame, -1)
frame.Show()
app.MainLoop()