dyn chain driver select rnd

hair_setting_ctrls = [cmds.listConnections(h+'.startCurveAttract',s=1)[0] for h in cmds.ls(ns+':*',type='hairSystem') if cmds.listConnections(h+'.startCurveAttract',s=1)!=None]
for a in hair_setting_ctrls:
    print cmds
joints_in_chain = [a for a in cmds.listRelatives(hair_setting_ctrls[0],p=1,f=1,type='joint')[0][1:].split('|') if cmds.nodeType(a)=='joint']
for j in joints_in_chain:
    print cmds.listConnections(j)

cmds.ls(hair_setting_ctrls[0],long=1)[0]