Wed Oct 8 08:45:06 2025 pendulum_nonlinear_ode_test(): python version: 3.10.12 numpy version: 1.26.4 Solve pendulum_nonlinear_ode(). parameters: g = 9.81 l = 1.0 m = 1.0 t0 = 0.0 y0 = [1.22173048 0. ] tstop = 50.0 Graphics saved as "pendulum_nonlinear_theta.png" Graphics saved as "pendulum_nonlinear_energy.png" pendulum_nonlinear_ode_test(): Normal end of execution. Wed Oct 8 08:45:07 2025