title: Run python 2.7 inside python 3x virtualenv
body: <p>I have a <code>python 3.5x</code> <code>virtualenv</code>, I have some older <code>python 2.7</code> scripts I'd like to run <em>inside</em> this <code>python 3.5x virtualenv</code>, but obviously the two environments 2.7 vs 3x scripts are <strong>really different</strong> from simple things like print <code>""</code> to <code>print()</code> to much more involved things.</p>
  
  <p>Thus, how can I run these <code>python 2.7 scripts</code> inside this <code>python 3.5 env</code> (best case) without having to completely re-write these <code>python 2.7</code> scripts (worse case) or would I have to run these <code>python 2.7</code> scripts inside their own virtualenv (somewhat worse case) or something else entirely?</p>
  
  <p>Thank you in advance</p>