title: Linestyle in matplotlib step function
body: <p>Is it possible to set the linestyle in a matplotlib step function to dashed, dotted, etc.?</p>
  
  <p>I've tried: </p>
  
  <pre><code>step(x, linestyle='--'), 
  step(x, '--')
  </code></pre>
  
  <p>But it did not help.</p>