title: Create PNG with a row of numbers inside boxes with Python
body: <p>How could I create, using python, a graphic with a row of numbers inside boxes and arrows crossing from one box to another (as in the image below)? Then I'd like to save it as a PNG file.</p>
  
  <p><a href="https://i.stack.imgur.com/HLDHr.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HLDHr.png" alt="example of the graphic"></a></p>
  
  <p>The reason I'd like to use python is that I have to create this kind of graphics in bulks, varying the numbers inside the boxes.</p>