pip --version
pip 1.4.1 from /usr/lib/python2.6/site-packages (python 2.6)

---- Begin output of /usr/bin/pip install  --upgrade setuptools ----
STDOUT: Downloading/unpacking setuptools from https://pypi.python.org/packages/4f/5d/77ab299135d7a882fff2970b45c6a77d7d79db0363c395081770632e6f1d/setuptools-34.0.0.zip#md5=927ea526582deefbf98779b2c302dd3d
  Running setup.py egg_info for package setuptools
    Traceback (most recent call last):
      File "<string>", line 3, in <module>
      File "setuptools/__init__.py", line 12, in <module>
        import setuptools.version
      File "setuptools/version.py", line 1, in <module>
        import pkg_resources
      File "pkg_resources/__init__.py", line 70, in <module>
        import packaging.version
    ImportError: No module named packaging.version
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):

  File "<string>", line 3, in <module>

  File "setuptools/__init__.py", line 12, in <module>

    import setuptools.version

  File "setuptools/version.py", line 1, in <module>

    import pkg_resources

  File "pkg_resources/__init__.py", line 70, in <module>

    import packaging.version

ImportError: No module named packaging.version