<code>
Traceback (most recent call last):
  File "/usr/local/bin/bedup", line 9, in <module>
    load_entry_point('bedup==0.10.0', 'console_scripts', 'bedup')()
  File "/usr/lib/python3/dist-packages/pkg_resources.py", line 337, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/lib/python3/dist-packages/pkg_resources.py", line 2280, in load_entry_point
    return ep.load()
  File "/usr/lib/python3/dist-packages/pkg_resources.py", line 1990, in load
    entry = __import__(self.module_name, globals(),globals(), ['__name__'])
  File "/usr/local/lib/python3.2/dist-packages/bedup/__main__.py", line 34, in <module>
    from contextlib import closing, ExitStack
ImportError: cannot import name ExitStack


</code>