title: No Module Named Ipywidgets Error
body: <p>I'm new in Ipython and Jupyter Notebook. I installed the ipywidgets module in Jupyter Notebook by using Anaconda prompt window. </p>
  
  <p>I tried:</p>
  
  <pre><code>pip install ipywidgets
  </code></pre>
  
  <p>It said that the requirements had already satisfied. Then I tried to import the module but received the "<strong>ImportError: No module named ipywidgets</strong>" error.</p>
  
  <p>Then I tried:</p>
  
  <pre><code>conda install ipywidgets
  </code></pre>
  
  <p>It fetched some files from the "<strong>api.anaconda.org</strong>" site and installed the files. I exited from Jupyter Notebook and entered again. When I tried to import the modüle received the same "<strong>ImportError: No module named ipywidgets</strong>" error.</p>
  
  <p>I have no idea what is wrong. How can I import this modüle to Jupyter Notebook and Anaconda ?</p>