title: ipython from windows command line
body: <p>I changed the environment variable PATH, to a new value and then back to what I believe was the original one. But now I can't open a .ipynb file through the Windows command line the was I was used to.</p>
  
  <p>After changing the directory in command line and running </p>
  
  <p><code>ipython notebook notebook_name.ipynb</code></p>
  
  <p>I get the following message: </p>
  
  <blockquote>
    <p>'ipython' is not recognized as an internal or external command.</p>
  </blockquote>
  
  <p>My environment variable is set to a folder with python.exe, and this folder includes a subfolder with ipython.exe and jupyter-notebook.exe. When I open iPython command line and type %env, I can see the full path to the correct subfolder under PATH.</p>
  
  <p>Can someone point to a solution?</p>
  
  <p>Thanks.</p>