title: Installing python-dev in virtualenv
body: <p>I am trying to install mysqlclient for python in my virtualenv. It fails with the following: </p>
  
  <pre><code> #include "Python.h"
  
                  ^
  
  compilation terminated.
  error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
  </code></pre>
  
  <p>After some research, i found out that i require python-dev installation. I have it installed in my main directories (i.e /usr/bin ... ) but its not installed virtualenv but each time i type: </p>
  
  <pre><code>sudo apt-get install python-dev
  </code></pre>
  
  <p>I get the following response: </p>
  
  <pre><code>Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  python-dev is already the newest version.
  0 upgraded, 0 newly installed, 0 to remove and 453 not upgraded.
  </code></pre>
  
  <p>Showing its availability, outside the virtualenv mysqlclient installs properly. The issue is how to rectify python-dev installation into the virtualenv</p>