error tk

Microsoft Windows [Versión 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. Reservados todos los derechos.

C:\Users\Administrador>cd \

C:\>tk.py
Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Python34\lib\tkinter\__init__.py", line 1482, in __call__
    return self.func(*args)
  File "C:\tk.py", line 5, in xd
    ventana.webbrowser.open_new_tab("www.google.es")
  File "C:\Python34\lib\tkinter\__init__.py", line 1878, in __getattr__
    return getattr(self.tk, attr)
AttributeError: 'tkapp' object has no attribute 'webbrowser'











from tkinter import *
import webbrowser

def xd():
  ventana.webbrowser.open_new_tab("www.google.es")


ventana = Tk()

ventana.title ("navegador")

botones = Button(ventana,text="google",command=xd)
botones.pack()




ventana.mainloop()