title: Ipython notebook - fails to open
body: <p>I have tried to open ipython notebook without luck and don't know why?</p>
  
  <p>When i type the command "ipython notebook", the output i receive is :</p>
  
  <p>-bash: /usr/local/bin/ipython: /usr/local/opt/python/bin/python2.7: bad interpreter: No such file or directory</p>
  
  <p>Any help ?</p>