[SciPy-User] curve_fit cannot accept a function with list or array as parameters?

[Spark Liang]

Hi, I'm using scipy.optimize.curve_fit to fit two sets of data (x, y). But I
found that curve_fit cannot accept a function with list or numpy.ndarray as
parameters.
For example, one of my function is :
def testfunc(x, beta)
       a = beta[0]
       b = beta[1]
       c = beta[2]
       d = beta[3]
       return a+b*x+c*x**2+d*x**4
In my program, I create the parameters guess: c = [1, 2, 3].  When I using
curve_fit as: popt, pcov = curve_fit(testfunc, x, y, p0=c). It threw the
errors:  TypeError: testfunc() takes exactly 2 arguments (4 given).
How to resolve the problems ?
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