title: __rlshift__, __ror__ in Python
body: <p>I noticed that this <a href="http://code.activestate.com/recipes/384122/#" rel="noreferrer">recipe</a> seems to use <code>__rlshift__</code>, <code>__ror__</code> like operators. But, they aren't in the <a href="http://docs.python.org/3.1/library/operator.html" rel="noreferrer">documentation</a>! Can anyone explain these and perhaps point to some docs?</p>