title: python 2 instead of python 3 as the (temporary) default python?
body: <p>on my computer</p>
  
  <pre><code>~$ python -V
   Python 3.2.1
  </code></pre>
  
  <p>but I get into problems when I run some python programs. my guess is (or at least I want to try this) that there is some backward compatibility issues, and I want to run those python scripts with </p>
  
  <pre><code> python2 2.7.2-2
  </code></pre>
  
  <p>which is also installed on my system but I do not know how to make it as the (temporary) default python. The python script starts with</p>
  
  <pre><code> #!/usr/bin/env python
  </code></pre>
  
  <p>and I am using arch linux.</p>