title: In Python how do I use a class method without passing an instance to it?
body: <p>So I have a common module which contains processing functions for numbers and types of data I am using. I want to be able to include it like <code>from common import common</code> (or better yet just <code>import common</code>) and use functions like <code>common.howLongAgo(unixTimeStamp)</code></p>
  
  <p>What is required to do this in my common module?. Common is a module consisting of a class 'common'.</p>