title: Upgrade python from 2.7 to 3.4 in virtual environment
body: <p>I have a virtual machine on rhel 7 that comes along with a built in package of python 2.7 , now i have a created a virtual environment for Django where few libraries are expecting the Python version to be 3.4 or version's more than that.
  I am not able to Upgrade python inside my Django virtual environemnt , i tried out many update commands to have it from 2.7 to 3.5 but it isn't working out.</p>
  
  <p>For Example:</p>
  
  <pre><code>pip install Python --upgrade
  Requirement already up-to-date: Python in /usr/lib64/python2.7/lib-dynload (2.7.5)
  </code></pre>
  
  <p>Please let me know how do i upgrade my Python to a higher version in  Django virtual env. </p>