title: What is %pylab?
body: <p>I keep seeing people use <code>%pylab</code> in various code snippits, particularly with iPython. However, I cannot see where <code>%pylab</code> is mentioned anywhere in Learning Python (and the few other Python books I have) and am not really sure what it means.</p>
  <p>I'm sure the answer is simple, but can anyone enlighten me?</p>