title: How to get python 2.7.3 in virtualenv instead of python 2.7.1?
body: <p>I have python 2.7.3 install on my mac OS X. 
  $ python --version
  Python 2.7.3</p>
  
  <p>Then I created a virtual environment: 
  $ virtualenv 1stVirtualenv
  Now the python version is 2.7.1</p>
  
  <p>I searched online and some people suggested using -p option, so I tried this
  virtualenv -p /usr/bin/python2.7 2ndVirtualenv
  It is still 2.7.1</p>
  
  <p>I could not find any answers to solve this problem. Any suggestions are welcome.</p>