title: Make scatter plot from set of points in tuples
body: <p>I have set of points in tuples, like this:</p>
  
  <pre><code>&gt;&gt;&gt; s
  set([(209, 147),
       (220, 177),
       (222, 181),
       (225, 185),
       (288, 173),
       (211, 155),
       (222, 182)])
  </code></pre>
  
  <p>What is the right way to do scatter plot of this set?</p>