title: Install library packages for other python version
body: <p>I have installed the two python versions v2.7 and v3.7 on the same machine. I want to install the some packages for Python 3.7 when i am trying to install it installing for python2.7. Can any one help here how can i install the packages for python3.7. </p>
  
  <p><code>Installed /usr/lib/python2.7/site-packages/configlib-2.0.4-py2.7.egg
  Processing dependencies for configlib==2.0.4
  Searching for everett==0.9
  Reading https://pypi.python.org/simple/everett/</code></p>
  
  <p><code>[root@nodehost configlib-2.0.4]# /usr/local/lib/python3.7 setup.py install
  bash: /usr/local/lib/python3.7: Is a directory
  [root@nodehost configlib-2.0.4]#
  </code></p>