convCreaseSet.py

import maya.cmds as cmds

def convCreaseSet():
    creaseDict={}

    for _mesh in cmds.ls(type="mesh"):
        for _edge in cmds.ls("%s.e[*]" % _mesh,fl=True):
            _value=cmds.polyCrease(_edge,q=True,v=True)
            creaseDict.setdefault(_value[0],[]).append(_edge)

    for _key,_value in creaseDict.items():
        if not _key <= 0.0:
            _sets=cmds.createNode("creaseSet")
            cmds.sets(_value,add=_sets)
            cmds.setAttr("%s.creaseLevel" % _sets,_key)
            
convCreaseSet()