title: Numexpr: How to use "local_dict" and "global_dict"?
body: <p>I have been experimenting and trying to learn the <a href="http://code.google.com/p/numexpr/wiki/UsersGuide" rel="noreferrer">Numexpr</a> package. Examples on how to use it are sparse at best. Can someone please give me a quick example on how to use the "local_dict" and "global_dict" arguments?</p>