Here's how I went about the exercise from the last section.

Exercise 10: Calculate what the node image size would be, if constrained by Figure width

• Find the total available hortizontal space in the Figure.
• Given the size of the spacing between layers, calculate the node image width that would completely fill the available horizontal space.
• Find the corresponding node image height.

Feel free to use my solution to the last exercise as a starting point: nn_viz_09.py

Ready? Go for it.