check max influence and select these vertex. for Maya

check_maximum_influence.py

import maya.cmds as cmds
import maya.mel as mel


DEFAULT_MAXIMUM_INFULENCE = 5
##############################################################################
#1頂点に影響するジョイントの上限チェックする
##############################################################################
def check_maximum_influence(max=DEFAULT_MAXIMUM_INFULENCE):
    res = []
    cmds.select(clear=True)

    skin_clusters = cmds.ls(type="skinCluster")
    for cluster in skin_clusters:
        for mesh in cmds.skinCluster(cluster, q=True, geometry=True):
            res += check_mesh(max, cluster, mesh)

    print("{0} 頂点のジョイントインフルエンスが上限 {1} を超えています".format(
                                                            len(res), max))
    cmds.select(res)


def check_mesh(max, cluster, mesh):
    vertices = cmds.polyListComponentConversion(mesh, toVertex=True)
    vertices = cmds.filterExpand(vertices, selectionMask=31)  # polygon vertex

    res = []
    for vert in vertices:
        joints = cmds.skinPercent(
            cluster, vert, query=True, ignoreBelow=0.000001, transform=None)

        if len(joints) > max:
            res.append(vert)

    return res

check_maximum_influence()