Rebuild crv by length

# Rebuild crv by length
from pymel.core import *
import random as r
sl = selected()
for s in sl:
    crvDensity = 20
    sh = s.getShape()
    scl = arclen(sh)
    crvDenistyAmnt = crvDensity*scl
    print s, crvDenistyAmnt
    rebuildCurve(s, ch=0, rpo=1, rt=0, end=1, kr=0, kcp=0, kep=0, kt=0, s = crvDenistyAmnt, d=3, tol=0)