Tue Jan 25 11:08:50 2022 backward_euler_test(): Python version: 3.6.9 Test backward_euler. humps_backward_euler(): Solve the humps ODE system using backward_euler(). Graphics saved as "humps_backward_euler.png" predator_prey_backward_euler(): Solve the predator prey ODE system using backward_euler(). Graphics saved as "predator_prey_backward_euler.png" backward_euler_test: Normal end of execution. Tue Jan 25 11:08:51 2022