title: "No module named ipython" error despite already installed
body: <p>I am trying to launch ipython using the command: <code>python -m ipython</code></p>
  
  <p>When launched I get the following error : <code>C:\Program Files\Python36\python.exe: No module named ipython</code></p>
  
  <p>This is strange because when I run <code>python -m pip show ipython</code>, I get the following message :</p>
  
  <pre><code>Name: ipython
  Version: 6.2.1
  Summary: IPython: Productive Interactive Computing
  Home-page: https://ipython.org
  Author: The IPython Development Team
  Author-email: ipython-dev@python.org
  License: BSD
  Location: c:\program files\python36\lib\site-packages
  Requires: simplegeneric, setuptools, decorator, pickleshare, traitlets,         
  pygments, colorama, prompt-toolkit, jedi
  </code></pre>
  
  <p>I already ensured that all dependencies were correctly installed.
  Could you please help me ?</p>