bubbles.py

#creates and parents a polySphere at every joint in a characters skeleton, beginning at the variable core

import maya.cmds as cmd

size = 5
names="ball"
core = "AnimData_Hips"
cmd.polySphere(n=names)
xhips = cmd.getAttr(core+".translateX", asString=False)
yhips = cmd.getAttr(core+".translateY", asString=False)
zhips = cmd.getAttr(core+".translateZ", asString=False)
cmd.move(xhips, yhips, zhips)
cmd.scale(size, size, size)
cmds.parentConstraint(core,  names)
jointsAll = cmd.listRelatives(core, allDescendents=True)
jointsAll.reverse()
for place in jointsAll:
    print(place+"\n")
    coords  = cmd.xform(place,q=True,ws=True,rp=True)
    cmd.polySphere(n=names+"_"+place)
    cmd.scale(size, size, size)
    xhips = coords[0]
    yhips = coords[1]
    zhips = coords[2]
    cmd.move(xhips, yhips, zhips)
    cmd.parentConstraint(place,  names+"_"+place)