在Mac上安装Snack for Python的问题

Question

我正在尝试在我的Mac电脑上安装Python的软件包tkSnack（http://www.speech.kth.se/snack/）。

我下载了软件包，运行了“setup.py”文件并没有收到任何错误消息。但是，当我尝试如下初始化时，我收到一条错误消息：

from Tkinter import *
root = Tk()

import tkSnack
tkSnack.initializeSnack(root)

输入最后一行后收到错误消息：

>>> from Tkinter import *
>>> from tkSnack import *
>>> root = Tk()
>>> tkSnack.initializeSnack(root)
Traceback (most recent call last):
  File "", line 1, in 
  File "tkSnack.py", line 21, in initializeSnack
    Tkroot.tk.call('eval', 'package require snack')
_tkinter.TclError: can't find package snack

感谢。

编辑： 运行setup.py文件后添加了输出：

Fredriks-MacBook-Air:python Fredrik$ sudo python setup.py install
running install
running build
running build_py
creating build
creating build/lib
copying tkSnack.py -> build/lib
running install_lib
byte-compiling /Library/Python/2.7/site-packages/tkSnack.py to tkSnack.pyc
running install_egg_info
Writing /Library/Python/2.7/site-packages/tkSnack-2.2.9-py2.7.egg-info
Fredriks-MacBook-Air:python Fredrik$