python maya Minimize Rotation Curve

def minimizeRotationCurves(obj):
    rotateCurves = mc.keyframe(obj, attribute=('rotateX','rotateY', 'rotateZ'), query=True, name=True)

    if not rotateCurves or len(rotateCurves) < 3: return
    keyTimes = mc.keyframe(rotateCurves, query=True, timeChange=True)
    tempFrame = sorted(keyTimes)[0] - 1
    mc.setKeyframe(rotateCurves, time=(tempFrame,), value=0)
    mc.filterCurve(rotateCurves)
    mc.cutKey(rotateCurves, time=(tempFrame,))

curve_transforms = [cmds.listRelatives(i, p=1, type='transform')[0] for i in cmds.ls(type='nurbsCurve', o=1, r=1, ni=1)]
for curve in curve_transforms:
    minimizeRotationCurves(curve)