Get highest Group

#cwisbg
# Get highest Group
"""

or s.root()


"""
from pymel.core import *
sl=selected()
def getHiGrp(s):
    x = s
    hiGrp = []
    while x:
        x = listRelatives(x, p=1)
        hiGrp.append(x)
    if len(hiGrp) < 2:
        return s
    else:
        return hiGrp[-2]
x = getHiGrp(sl[0])