def standin_timeNode():
    import maya.cmds  as cmds
    timeNode = cmds.ls(type='time')
    standinList = cmds.ls(sl=True, dag=True, ap=True, type='aiStandIn')
    print standinList

    for i in standinList:
        print i
        try:
            # standinShape = cmds.listRelatives(i, type='aiStandIn')
            cmds.setAttr(i + '.useFrameExtension', 0)
            x = cmds.listConnections(i, type='expression')
            cmds.delete(x)
            cmds.connectAttr(timeNode[0] + '.outTime', i + '.frameNumber', f = True)
            cmds.setAttr(i + '.useFrameExtension', 1)
        except RuntimeError as e:
            print " Could not connect Attributes "

standin_timeNode()