findRelatedSkinCluster.py

# Python version of findRelatedSkinCluster.mel
# Based in findRelatedSkinCluster.mel MEL script file found in Maya 2020

import maya.cmds


def find_related_skin_cluster(skin_obj):
    skin_shape = None
    skin_shape_with_path = None
    hidden_shape = None
    hidden_shape_with_path = None
    cp_test = maya.cmds.ls(skin_obj, type='controlPoint')
    if cp_test:
        skin_shape = skin_obj
    else:
        rels = maya.cmds.listRelatives(skin_obj)
        for r in rels:
            skin_obj_r = '{}|{}'.format(skin_obj, r)
            cp_test = maya.cmds.ls(skin_obj_r, type='controlPoint')
            if not cp_test:
                continue
            io = maya.cmds.getAttr('{}.io'.format(skin_obj_r))
            if io:
                continue
            visible = maya.cmds.getAttr('{}.v'.format(skin_obj_r))
            if not visible:
                hidden_shape = r
                hidden_shape_with_path = skin_obj_r
                continue
            skin_shape = r
            skin_shape_with_path = skin_obj_r
            break
    
    if not skin_shape:
        if not hidden_shape:
            return ''
        else:
            skin_shape = hidden_shape
            skin_shape_with_path = hidden_shape_with_path
            
    clusters = maya.cmds.ls(type='skinCluster')
    for c in clusters:
        geos = maya.cmds.skinCluster(c, query=True, g=True)
        for geo in geos:
            if geo == skin_shape or geo == skin_shape_with_path:
                return c
                
    return ''


# print(find_related_skin_cluster('pSphere1'))