[SciPy-user] Correct syntax for optimize.fmin_powell

Can someone point me to the correct syntax for optimize.fmin_powell when the objective function takes side arguments. I have tried every possibility I can think of, most of which work fine for optimize.fmin, but keep getting error messages, mainly due to an incorrect number of arguments. I have looked at the source, but that hasn't helped. I am typically trying to something like def test_arg((x,y),(a,b)): return (x-a)**2 + (y-b)**2 min = optimize.fmin_powell(test_arg,(1.0,2.0), ((5.0,6.0),)) This works with optimize.fmin, but fails with optimize.fmin_powell. Thanks Jaroslav