title: How to fully customize subplot size in matplotlib
body: <p>I want to have two subplots in a matplotlib figure that are sized and positioned relative to each other like the example below (for stylistic reasons).  All the examples I've seen for customizing subplot placement and sizes still tile and fill the entire figure footprint.  What can I do to get the rightmost plot positioned with some whitespace like below?</p>
  
  <p><a href="https://i.stack.imgur.com/tRLxM.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tRLxM.jpg" alt="enter image description here"></a></p>