title: Trying to call method on dict, getting AttributeError: 'dict' object attribute 'update' is read-only
body: <p>I have no idea what is wrong or what causes the error:</p>
  
  <pre><code>AttributeError: 'dict' object attribute 'update' is read-only
  </code></pre>
  
  <p>on the following code:</p>
  
  <pre><code>map = []
  point1back = {}
  point1fwd = {}
  point1back.update = {'nextHop':point1Fwd, 'direction':1, 'distance':0}
  point1fwd.update = {'nextHop':point1Fwd, 'direction':3, 'distance':160}
  map.append(point1back)
  map.append(point1fwd)
  </code></pre>