scipy.interpolate.RectBivariateSpline.
get_knots
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RectBivariateSpline.get_knots()[source]
Return a tuple (tx,ty) where tx,ty contain knots positions
of the spline with respect to x-, y-variable, respectively.
The position of interior and additional knots are given as
t[k+1:-k-1] and t[:k+1]=b, t[-k-1:]=e, respectively.
