title: Matplotlib scatter(): default value for size, marker shape
body: <p>Is there a way to set <strong>default</strong> marker size (<code>s</code>) parameter for matplotlib <code>plt.scatter()</code> (or likewise to set the shape of the marker)?</p>
  
  <p><code>mpl.rcParams.keys()</code> has settings for the line plots, e.g.</p>
  
  <pre><code>import matplotlib as mpl
  mpl.rcParams['lines.marker']='D'
  </code></pre>
  
  <p>... but they do not seem to relate to <code>plt.scatter()</code>.</p>
  
  <p>Thanks.</p>
  
  <p><strong>Clarification:</strong></p>
  
  <p>I'd like to use a configuration mechanism like <code>mpl.rcParams()</code>, or some other reasonably civilized method. Locally modifying library code is not it. </p>
  
  <p>On the other hand, if it cannot currently be done and somebody submits a patch to Matplotlib, that would be awesome. </p>