title: How to install the pycrypto module for a definite python version
body: <p>I'm trying to install "Userful MultiSeat-X64-5.0.1 ..." in Ubuntu 13.04 x64, and encountered the following error at the end of the installation:</p>
  
  <pre><code>File "&lt;string&gt;", line 6, in &lt;module&gt;
  ImportError: No module named Crypto.Cipher
  </code></pre>
  
  <p>This message means, that there is no pycrypto module.</p>
  
  <p>There is how I should install it:</p>
  
  <pre><code>pip install pycrypto
  </code></pre>
  
  <p>But the problem is that userful5 requires python 2.6 to work and ubuntu 13.04 uses python 2.7 as default. I've installed python 2.6, but I don't know how to install the pycrypto module for it.</p>
  
  <pre><code>pip install pycrypto
  </code></pre>
  
  <p>returns:</p>
  
  <pre><code>Requirement already satisfied (use --upgrade to upgrade): pycrypto in /usr/lib/python2.7/dist-packages
  </code></pre>
  
  <p>As I understand, this module is already installed in python 2.7
  But how can I install it to python 2.6?</p>