title: python matplotlib dash-dot-dot - how to?
body: <p>I am using python and matplotlib to generate graphical output.<br>
  Is there a simple way to generate a dash-dot-dot line-style?<br>
  I am aware of the <code>'--'</code>, <code>'-.'</code>, and <code>':'</code> options. Unfortunately, <code>'-..'</code> does not result in a dash-dot-dot line.<br>
  I have looked at the <code>set_dashes</code> command, but that seems to control the length of the dashes and the space between two adjacent dashes.<br>
  One option may be to plot two lines on top of each other; one dashed with ample space between the dashes - and one dotted, with the dots as large as the dashes are wide and spaced so that two dots are in between each of the dashes. I do not doubt this can be done, I am simply hoping for an easier way.<br>
  Did I overlook an option?  </p>