The Predator Prey code is using scipy.integrate the obeint subfunction however this has been replaced as described here https://docs.scipy.org/doc/scipy/reference/generated/scipy.integrate.odeint.html#scipy.integrate.odeint The suggested replacement is here https://docs.scipy.org/doc/scipy/reference/generated/scipy.integrate.solve_ivp.html#scipy.integrate.solve_ivp Thanks for your videos and code