title: Matplotlib - Plot 1D range line and scatter points on it
body: <p>Any suggest to reproduce this kind of graph ?</p>
  <p><a href="https://i.stack.imgur.com/tjvIg.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tjvIg.png" alt="enter image description here" /></a></p>
  <p>I am trying to reproduce only whiskers of a generic boxplot. Vertical lines rapresent a specific range and i would plot points on them in order to highlight which points are inside or outside.
  My difficulty is to draw extrema borders of these 1D range lines.
  Thank you</p>