blenderのcurveでControlPointを取得

import bpy

ob = bpy.context.object
assert ob.type == 'CURVE' # throw error if it's not a curve

curve = ob.data
spline = curve.splines.active # let's assume there's only one
assert spline.type == 'BEZIER' # throw error if it's not a bezier

print(len(spline.bezier_points)) # print number of points
print(spline.bezier_points[0].co) # print coordinate of first point
print(spline.bezier_points[0].handle_left) # ... and its left handle's coordinate
print(spline.bezier_points[0].handle_right) # ... as well as the right one

import bpy

cv = bpy.data.curves['BezierCurve']

print('-------')

for sp in cv.splines:

    #sp = cv.splines[0]
    print('----------------------')

    # spでもOK. curveを取得してsplinesの0にいってそこからいろいろ調べられるみたい。
    print(len(sp.bezier_points)) # print number of points
    
    for id, p in enumerate(sp.bezier_points):
        
        print("id:" + str(id))
        print("co:" + str(p.co)) # print coordinate of first point
        print("handle_left:" + str(p.handle_left)) # ... and its left handle's coordinate
        print("handle_right:" + str(p.handle_right)) # ... as well as the right one)