title: command line ipython with --pylab + more imports
body: <p>The <code>--pylab</code> command line arguments makes <code>ipython</code> a quick but powerful calculator in the terminal window which I use quite often. Is there a way to pass other useful imports to <code>ipython</code> via command line, such as</p>
  <pre><code>from scipy.constants import * 
  </code></pre>
  <p>which makes it even more convenient to use?</p>