title: installing python-software-properties on ubuntu 12.04
body: <p>I am trying to install python-software-properties package on an ubuntu 12.04 machine. I keep getting:</p>
  
  <pre><code>The following packages have unmet dependencies:
  python-software-properties : Depends: python (&lt; 2.7) but 2.7.3-0ubuntu2 is to be installed
                            Depends: python-pycurl but it is not going to be installed
  E: Unable to correct problems, you have held broken packages.
  </code></pre>
  
  <p>Aptitude shows the version it is attempting to install is 0.75.10.3. I have run apt-get update, of course. I need this to add a ppa to my repo list.</p>