Comment 7 for bug 1217288

sudo pip install -r requirements.txt

Requirement already satisfied (use --upgrade to upgrade): pbr>=0.5.21,<1.0 in /usr/local/lib/python2.7/dist-packages/pbr-0.5.21-py2.7.egg (from -r requirements.txt (line 1))
Downloading/unpacking dnspython>=1.10.0 (from -r requirements.txt (line 2))
  Downloading dnspython-1.11.0.zip (220Kb): 220Kb downloaded
  Running setup.py egg_info for package dnspython

Requirement already satisfied (use --upgrade to upgrade): eventlet>=0.9.15 in /usr/lib/python2.7/dist-packages (from -r requirements.txt (line 3))
Requirement already satisfied (use --upgrade to upgrade): greenlet>=0.3.1 in /usr/lib/python2.7/dist-packages (from -r requirements.txt (line 4))
Requirement already satisfied (use --upgrade to upgrade): netifaces>=0.5 in /usr/lib/python2.7/dist-packages (from -r requirements.txt (line 5))
Requirement already satisfied (use --upgrade to upgrade): pastedeploy>=1.3.3 in /usr/lib/python2.7/dist-packages (from -r requirements.txt (line 6))
Requirement already satisfied (use --upgrade to upgrade): simplejson>=2.0.9 in /usr/lib/python2.7/dist-packages (from -r requirements.txt (line 7))
Requirement already satisfied (use --upgrade to upgrade): xattr>=0.4 in /usr/lib/python2.7/dist-packages (from -r requirements.txt (line 8))
Requirement already satisfied (use --upgrade to upgrade): python-swiftclient in /home/swift/python-swiftclient (from -r requirements.txt (line 9))
Requirement already satisfied (use --upgrade to upgrade): pip>=1.0 in /usr/lib/python2.7/dist-packages (from pbr>=0.5.21,<1.0->-r requirements.txt (line 1))
Requirement already satisfied (use --upgrade to upgrade): d2to1>=0.2.10,<0.3 in /usr/local/lib/python2.7/dist-packages/d2to1-0.2.10-py2.7.egg (from python-swiftclient->-r requirements.txt (line 9))
Requirement already satisfied (use --upgrade to upgrade): setuptools in /usr/local/lib/python2.7/dist-packages/setuptools-0.6c11-py2.7.egg (from d2to1>=0.2.10,<0.3->python-swiftclient->-r requirements.txt (line 9))
Installing collected packages: dnspython
  Found existing installation: dnspython 1.9.4
    Uninstalling dnspython:
      Successfully uninstalled dnspython
  Running setup.py install for dnspython

Successfully installed dnspython
Cleaning up...

And after that I could install swift. Thank very much!