title: How to set fixed step size with scipy.integrate?
body: <p>I am looking for a way to set a fixed step size for solving my initial value problem by Runge-Kutta method in Python. Accordingly, how I can tell the <code>scipy.integrate.RK45</code> to keep a constant update (step size) for its integration procedure?</p>
  
  <p>Thank you very much.</p>