title: ImportError: Failed to import any qt binding
body: <p>I am getting this error:</p>
  
  <pre><code>File "/usr/local/lib/python3.7/dist-packages/matplotlib/backends/backend_qt5.py", line 15, in &lt;module&gt;
      import matplotlib.backends.qt_editor.figureoptions as figureoptions
    File "/usr/local/lib/python3.7/dist-packages/matplotlib/backends/qt_editor/figureoptions.py", line 12, in &lt;module&gt;
  </code></pre>
  
  <p>ImportError: Failed to import any qt binding</p>
  
  <p>I have installed PyQT5 suing sudo pip3 install PyQt5,but still getting this error.
  I am using Ubuntu 18.04.</p>
  
  <p>Please Help.</p>