title: PyCharm freezes after executing IPython Notebook cell
body: <p>My <strong>PyCharm</strong> freezes after running any code in <strong>.ipynb</strong> (Jupyter Notebook) file.
  i.e. the cell starts running and after that PyCharm doesnt respond and I have to kill it. No message is shown.</p>
  
  <p>.py scripts are running correctly. Can anyone help?</p>
  
  <p>My versions:</p>
  
  <pre><code> PyCharm Community Edition 2016.2.3   (Ubuntu 16.04)
   ipython                   5.1.0                    py35_0  
   jupyter                   1.0.0                    py35_3  
   notebook                  4.2.3                    py35_0  
  </code></pre>