multi obj export

.py

import os

import maya.cmds as cmds

path = cmds.fileDialog2(dialogStyle=1, fileMode=3)

if path:
    path = path[0]
    sel = cmds.ls(selection=True)
    for node in sel:
        cmds.select(cl=True)
        cmds.select(node)
        filename = os.path.join(path, '%s.obj' % node)
        cmds.file(filename, force=True, typ="OBJexport", es=1)
    
    cmds.select(sel)