Looping - Spline Control Points

Add this script to a "Batch Script" editor (F10) and execute it with Script > Run.

Get the number of control points from "Spline01" and the points' positions. Print the positions to the "Messages" panel:

# Get "Spline01" and its number of control points
spline = scene.getSpline("Spline01")
controlPoints = spline.getNumberOfControlPoints()

# Loop through the control points and print out their positions
for i in range(0, controlPoints):
	pointPosition = spline.getControlPointPosition(i)
	scene.message(str(pointPosition))