title: How to run Python nose tests with a different version of Python
body: <p>We have CentOS with the ancient Python 2.4 interpreter.</p>
  
  <p>But we would like to write out tests with a newer 2.5/2.6 syntax.</p>
  
  <p>Assuming we have a second Python interpreter installed (e.g. python2.6) is there any way
  to run the 'nosetests' shell command and tell it to use a specific python interpreter instead of the default one?</p>