title: How to get bounding box on matplotlib scientific notation?
body: <p>In the following matplotlib image, I want to get the coordinates for the bounding box of the axis scientific notation label - bottom right, enclosed in red.
  <a href="https://i.stack.imgur.com/vUfXu.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vUfXu.png" alt="enter image description here"></a></p>
  
  <p>From <a href="https://stackoverflow.com/questions/24581194/matplotlib-text-bounding-box-dimensions">this question</a>, it explains how to get the pixel coordinates from any text instance.  The problem is, I can't find how to access this text instance from an Axes object.  I know that this text is related to the <a href="https://matplotlib.org/api/ticker_api.html#matplotlib.ticker.ScalarFormatter" rel="nofollow noreferrer">ScalarFormatter</a> object that decides whether to use scientific notation, but looking at its source code, it doesn't keep track of the text instance.</p>
  
  <p>Anyone know how to do this?</p>