title: Bokeh plotting: 'NoneType' object has no attribute 'line'
body: <p>I've just installed the latest version of Anaconda.</p>
  
  <p>I am having a basic problem with Bokeh, from this <a href="http://bokeh.pydata.org/docs/gallery/correlation.html" rel="nofollow noreferrer">example</a>.</p>
  
  <pre><code>from bokeh.plotting import *
  f = figure()
  f.line(x, y)
  
  AttributeError: 'NoneType' object has no attribute 'line'
  </code></pre>
  
  <p>I can plot by saying line(x,y), but it looks like the above method would provide more flexibility if it worked.</p>