# -*- coding: utf-8 -*-

import wx

class MainFrame(wx.Frame):
    def __init__(self, parent):
        wx.Frame.__init__(self, parent, -1, 'Example', style=wx.CAPTION | wx.MINIMIZE_BOX | wx.CLOSE_BOX | wx.SYSTEM_MENU)
        self.SetSize((300, 300))
        self.Centre()

class Example(wx.App):
    def OnInit(self):
        frame = MainFrame(None)
        frame.Show()
        return True

def main():
    application = Example()
    application.MainLoop()

if __name__ == '__main__':
    main()

#####################################################
>>> 
Traceback (most recent call last):
  File "C:\temp\wx.py", line 3, in <module>
    import wx
  File "C:\temp\wx.py", line 5, in <module>
    class MainFrame(wx.Frame):
AttributeError: 'module' object has no attribute 'Frame'
>>>