title: Graphviz - Python : Making node shape into double ellipse with Graphviz
body: <p>I am using <a href="https://pypi.python.org/pypi/graphviz" rel="nofollow noreferrer">Graphviz 0.5.2</a> with in my python script, which is similar to this</p>
  
  <pre><code>from graphviz import Digraph
  dot = Digraph()
  dot.node('A', 'King Arthur', shape='ellipse')
  dot.node('B', 'Sir Bedevere the Wise', shape='ellipse')
  dot.node('L', 'Sir Lancelot the Brave', shape='ellipse')
  
  dot.edges(['AB', 'AL'])
  dot.edge('B', 'L', constraint='false')
  dot.render('test-output/round-table.gv', view=True)
  </code></pre>
  
  <p>it renders this:</p>
  
  <p><a href="https://i.stack.imgur.com/PIpKN.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PIpKN.png" alt="enter image description here"></a></p>
  
  <p>By default the shape of the node is an ellipse/oval but I would like to make it a double ellipse, there is a double circle shape but not an ellipse.</p>
  
  <p>I have tried <code>peripheries = 2</code> but i'm not sure of the right place to put it.</p>