Looks like not much. The book is about using Python to implement numerical methods, mainly about teaching the Python part, and that's all explained. You might be missing motivation if you don't know any physics, but even so, basic mechanics using differential equations seems to be enough to give context, at least for the earlier parts
reply> Exercises by chapter
replyClick on a chapter to download:
Chapter 2: Python programming for physicists
Chapter 3: Graphics and visualization
Chapter 4: Accuracy and speed
Chapter 5: Integrals and derivatives
Chapter 6: Solution of linear and nonlinear equations
Chapter 7: Fourier transforms
Chapter 8: Ordinary differential equations
Chapter 9: Partial differential equations
Chapter 10: Random processes and Monte Carlo methods
Chapter 11: Data science