title: importerror : cannot import name 'secure_write' while updating python in conda evironment
body: <p>I want to update my python version to python 3.6 ,<br> I am using conda environment therefore used the following command on the terminal :<br>
  <code>conda install python=3.6</code></p>
  
  <p>while installation I'm encountered with this error : <code>importerror : cannot import name 'secure_write'</code><br>
  Any help???</p>