title: Plotting a line in between subplots
body: <p>I have created a plot in Python with Pyplot that have multiple subplots. </p>
  
  <p>I would like to draw a line which is not on any of the plots. I know how to draw a line which is part of a plot, but I don't know how to do it on the white space between the plots.</p>
  
  <p>Thank you.</p>
  
  <hr>
  
  <p>Thank you for the link but I don't want vertical lines between the plots. It is in fact a horizontal line above one of the plots to denote a certain range. Is there not a way to draw an arbitrary line on top of a figure?</p>