title: What does In [*] in IPython Notebook mean and how to turn it off?
body: <p>I use Windows 7, Python 2.7.9 plus latest version of IPython 3.1.</p>
  
  <p>I ran <code>%python</code> inside an IPython Notebook and ran the cell, instead of returning the Python version, it did not run and jumped to a new line and printed a <code>In [*]</code> instead of a line number. Now no line is running in ipython everything is ignored when I try to run a cell value.</p>
  
  <p>Anyone know what has happen?</p>