I'm trying to write a program in python to solve a system of differential equations using the 4th order Runga-Kutta method. I would ideally like the program to be able to solve systems of arbitrary size. To do this, I believe I will need to write a function (rk4) that would take as argument another function (the derivs function). I've never written anything like that before though, I'm not exactly sure how to go about it... Could I write something like: def rk4 (derivs,whatever else) : . . . whatever=derivs(arguments) . . . return array of solutions Is there any special syntax involved in having one function take another as an argument like this? Is there anything else I should know before I try writing this?