[Numpy-discussion] cubic spline function in numarray or numpy

hi list, I am trying to find 1-D cubic spline function. Google search yields that there is a function called spline_filter1d in numarray. But I am not able to call it. Would someone point me to 1-D cubic spline function either in numarray or numpy? I can find source codes and enter in Python. But I prefer the built-in function. thanks, Shawn