title: the opposite of __add__?
body: <p>In python 3, I want to do operator overloading in a class I've made.</p>
  
  <p>I know <code>__add__</code> stands for operator +.</p>
  
  <p>What are the methods for <code>-</code>, <code>*</code>, <code>^</code>, <code>|</code> and <code>&amp;</code>?</p>