python3 pkg_resources error

When I try to import pkg_resources in python3 I get the following error:

>>> import pkg_resources
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 2850, in <module>
    add_activation_listener(lambda dist: dist.activate())
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 720, in subscribe
    callback(dist)
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 2850, in <lambda>
    add_activation_listener(lambda dist: dist.activate())
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 2282, in activate
    self.insert_on(path)
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 2389, in insert_on
    self.check_version_conflict()
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 2428, in check_version_conflict
    for modname in self._get_metadata('top_level.txt'):
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 2276, in _get_metadata
    for line in self.get_metadata_lines(name):
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 1230, in get_metadata_lines
    return yield_lines(self.get_metadata(name))
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 1227, in get_metadata
    return self._get(self._fn(self.egg_info,name)).decode("utf-8")
  File "/usr/lib/python3.3/site-packages/pkg_resources.py", line 1337, in _get
    stream = open(path, 'rb')
PermissionError: [Errno 13] Permission denied: '/usr/lib/python3.3/site-packages/python_dateutil-2.2-py3.3.egg/EGG-INFO/top_level.txt'

‘/usr/lib/python3.3/site-packages/python_dateutil-2.2-py3.3.egg/EGG-INFO/top_level.txt’ is only readable by it’s owner (root).