title: python matplotlib legend linestyle '---'
body: <p>I need a way to make matplotlib linestyle '---'. 3's of '-'.</p>
  
  <pre><code>character description
  '-'       solid line style
  '--'      dashed line style
  '-.'      dash-dot line style
  ':'       dotted line style
  etc.
  </code></pre>
  
  <p>I can see '-' and '--' in the list, but on the right up side, my legend comes up like " -- red dotted line" (If I write linestyle = '--'). I want '--- red dotted line' on my legend box</p>
  
  <p>Is there any way I can make the legend show three dashes?
  Here's what I'm doing.</p>
  
  <pre><code>import matplotlib.pyplot as mpt
  
  def main():
      mpt.title("hi")
      mpt.xlabel("x axis")
      mpt.ylim([0,50])
      mpt.xlim([0,10])
      mpt.ylabel("y axis")
      mpt.plot([1,2,3,4],[2,3,4,5],'r', linestyle = '???????')
      mpt.legend(["red dotted line"])
      mpt.show()
  
  main()
  </code></pre>