title: Variable width barplot with seaborn
body: <p>I am trying to create a bar plot with variable width x-axis bins in Seaborn. Similar to this chart:
  <a href="https://i.stack.imgur.com/ITrjC.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ITrjC.jpg" alt="enter image description here"></a>
  All of my x widths will add up to 100%, but I can't seem to find an example of how to accomplish this goal via Seaborn. Any ideas? </p>