RKF45 is a PYTHON library which implements the Watt and Shampine RKF45 ODE solver.
The RKF45 ODE solver is a Runge-Kutta-Fehlberg algorithm for solving an ordinary differential equation, with automatic error estimation using rules of order 4 and 5.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
RKF45 is available in a C version and a C++ version and a FORTRAN77 version and a FORTRAN90 version and a MATLAB version and a PYTHON version.
This Python implementation was written by Peter Monk.
You can go up one level to the Python source codes.