python refresher course
<p>What's the best online resource for:</p>

<blockquote>
  <p>Python for people who already speak Python</p>
</blockquote>

<p>I've been a programmer for 20 years, once considered python my favourite language and used it constantly for a year or so, but haven't used it for a couple now, and have mainly programmed in scheme and clojure. Now I need to use it again.</p>

<p>I'm looking for a set of finger exercises that I can do to refresh my skillz. It needs to be concise and hard whilst covering the basics. </p>
