Find the Bspline representation of an Ndimensional curve.
Given a list of N rank1 arrays, x, which represent a curve in Ndimensional space parametrized by u, find a smooth approximating spline curve g(u). Uses the FORTRAN routine parcur from FITPACK.
Parameters :  x : array_like
u : array_like, optional
ub, ue : int, optional
k : int, optional
task : int, optional
s : float, optional
t : int, optional
full_output : int, optional
nest : int, optional
per : int, optional
quiet : int, optional


Returns :  tck : tuple
u : array
fp : float
ier : int
msg : str

See also
splrep, splev, sproot, spalde, splint, bisplrep, bisplev, UnivariateSpline, BivariateSpline
Notes
See splev for evaluation of the spline and its derivatives.
References
[R19]  P. Dierckx, “Algorithms for smoothing data with periodic and parametric splines, Computer Graphics and Image Processing”, 20 (1982) 171184. 
[R20]  P. Dierckx, “Algorithms for smoothing data with periodic and parametric splines”, report tw55, Dept. Computer Science, K.U.Leuven, 1981. 
[R21]  P. Dierckx, “Curve and surface fitting with splines”, Monographs on Numerical Analysis, Oxford University Press, 1993. 