title: Installing Jupyter Extension, Failure to Enable 'nbextension'
body: <p>I'm posting this question as I couldn't solve this problem upon multiple sifting/troubeshooting on SO, etc.</p>
  
  <p>I have all the below packages successfully installed, a <code>pip list</code>, <code>conda list</code> shows:</p>
  
  <p><a href="https://i.stack.imgur.com/OBK8c.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/OBK8c.png" alt="enter image description here"></a></p>
  
  <p>The code I used to install the packages:</p>
  
  <pre><code>!pip install jupyter_contrib_nbextensions
  !pip install https://github.com/ipythoncontrib/jupyter_contrib_nbextensions/tarball/master
  jupyter contrib nbextension install --user
  </code></pre>
  
  <p>I also tried the last line with</p>
  
  <p><code>jupyter contrib nbextensions install --sys-prefix --skip-running-check</code></p>
  
  <p>I end up getting error:</p>
  
  <pre><code>File "&lt;ipython-input-5-1c0e089b301b&gt;", line 1
      jupyter contrib nbextension install --user
                    ^
  SyntaxError: invalid syntax
  </code></pre>
  
  <p>When running on terminal in Administrator mode, I get:</p>
  
  <pre><code>C:\WINDOWS\system32&gt;python -m pip install jupyter_contib_nbextensions
  Collecting jupyter_contib_nbextensions
  ERROR: Could not find a version that satisfies the requirement jupyter_contib_nbextensions (from versions: none)
  ERROR: No matching distribution found for jupyter_contib_nbextensions
  
  </code></pre>
  
  <p>What am I missing here? I also tried upgrading <code>jupyter, ipython</code>; thanks in advance.</p>