title: Python command on MacOS terminal not working
body: <p>I am using MacOS 10.8. I uninstalled python 3.2.3 and installed 2.7. 
  But when I type <code>python</code> in the terminal it shows:</p>
  
  
  
  <pre><code>-bash: python3: command not found.
  </code></pre>
  
  
  
  <p>if I use <code>/usr/bin/python</code> then python 2.7 runs. How do I fix this?</p>