Euler curve filer is not working for objects in animation layer

[likage]

Hi everyone, I have trouble in doing euler-filtering in a pythonic if the object channels is stemming from an animation layer (where the channels are in 'greenish-blue' instead of the red.

I tried the following:

sel = '|man_rig|hands|right_arm|right_hand_ctrl'
channels = ["translate", "rotate"]

axes = ["X", "Y", "Z"]

for channel in channels:

    for axis in axes:

        attribute = "{0}.{1}{2}".format(sel, channel, axis)

        in_conn = cmds.listConnections(

            attribute,

            source=True,

            plugs=True

        )

        cmds.filterCurve(in_conn, filter="euler")

The above code works if my object is not in animation layer(s).

When I enable 'echo all commands' in the Script Editor, it echoes out a long line, something as follows:

.._myAnimLayer_inputB .._myAnimLayer_inputA

How do I derive these inputA, inputB? Or if there is a better way to euler filter for objects whose channels are in animation layer?