title: Unable to install LIbraries for Python3.6.5
body: <p>I had pyhton2.7 and Python3.5 in my laptop but to use f string, I installed  pyhton3.6.5 and removed python3.5. Now I have python2.7 and Python3.6.5. But I am not able to install any libraries for the python3.6.5</p>
  
  <p>I have tried <a href="https://stackoverflow.com/questions/51054281/pip-for-python3-6-5-on-debian9-4">this</a> but it doesn't works</p>
  
  <p>Please let me know how can I install modules for the python3.6.5</p>