title: How to fix 'env: python: No such file or directory: on Mac
body: <p>I've recently removed the default version of <code>python2.7</code> on my Mac. When I tried to execute python code I got the following error:</p>
  
  <pre><code>env: python: No such file or directory.
  </code></pre>
  
  <p>I installed python3 with <code>home-brew</code> however I need <code>python2.7</code> and can't install with <code>home-brew</code> </p>
  
  <p>How can I get back the original version <code>2.7</code> ?</p>