How to use the scons.scons-local-250.SCons.Action.ListAction function in SCons

def _do_create_list_action(act, kw):
    """A factory for list actions.  Convert the input list into Actions
    and then wrap them in a ListAction."""
    acts = []
    for a in act:
        aa = _do_create_action(a, kw)
        if aa is not None: acts.append(aa)
    if not acts:
        return ListAction([])
    elif len(acts) == 1:
        return acts[0]
    else:
        return ListAction(acts)

def _actionAppend(act1, act2):
    # This function knows how to slap two actions together.
    # Mainly, it handles ListActions by concatenating into
    # a single ListAction.
    a1 = Action(act1)
    a2 = Action(act2)
    if a1 is None:
        return a2
    if a2 is None:
        return a1
    if isinstance(a1, ListAction):
        if isinstance(a2, ListAction):
            return ListAction(a1.list + a2.list)
        else:
            return ListAction(a1.list + [ a2 ])
    else:
        if isinstance(a2, ListAction):
            return ListAction([ a1 ] + a2.list)
        else:
            return ListAction([ a1, a2 ])

def _actionAppend(act1, act2):
    # This function knows how to slap two actions together.
    # Mainly, it handles ListActions by concatenating into
    # a single ListAction.
    a1 = Action(act1)
    a2 = Action(act2)
    if a1 is None:
        return a2
    if a2 is None:
        return a1
    if isinstance(a1, ListAction):
        if isinstance(a2, ListAction):
            return ListAction(a1.list + a2.list)
        else:
            return ListAction(a1.list + [ a2 ])
    else:
        if isinstance(a2, ListAction):
            return ListAction([ a1 ] + a2.list)
        else:
            return ListAction([ a1, a2 ])

def _do_create_list_action(act, kw):
    """A factory for list actions.  Convert the input list into Actions
    and then wrap them in a ListAction."""
    acts = []
    for a in act:
        aa = _do_create_action(a, kw)
        if aa is not None: acts.append(aa)
    if not acts:
        return ListAction([])
    elif len(acts) == 1:
        return acts[0]
    else:
        return ListAction(acts)

def _do_create_list_action(act, kw):
    """A factory for list actions.  Convert the input list into Actions
    and then wrap them in a ListAction."""
    acts = []
    for a in act:
        aa = _do_create_action(a, kw)
        if aa is not None: acts.append(aa)
    if not acts:
        return ListAction([])
    elif len(acts) == 1:
        return acts[0]
    else:
        return ListAction(acts)

def _actionAppend(act1, act2):
    # This function knows how to slap two actions together.
    # Mainly, it handles ListActions by concatenating into
    # a single ListAction.
    a1 = Action(act1)
    a2 = Action(act2)
    if a1 is None:
        return a2
    if a2 is None:
        return a1
    if isinstance(a1, ListAction):
        if isinstance(a2, ListAction):
            return ListAction(a1.list + a2.list)
        else:
            return ListAction(a1.list + [ a2 ])
    else:
        if isinstance(a2, ListAction):
            return ListAction([ a1 ] + a2.list)
        else:
            return ListAction([ a1, a2 ])

# This function knows how to slap two actions together.
    # Mainly, it handles ListActions by concatenating into
    # a single ListAction.
    a1 = Action(act1)
    a2 = Action(act2)
    if a1 is None:
        return a2
    if a2 is None:
        return a1
    if isinstance(a1, ListAction):
        if isinstance(a2, ListAction):
            return ListAction(a1.list + a2.list)
        else:
            return ListAction(a1.list + [ a2 ])
    else:
        if isinstance(a2, ListAction):
            return ListAction([ a1 ] + a2.list)
        else:
            return ListAction([ a1, a2 ])

# Mainly, it handles ListActions by concatenating into
    # a single ListAction.
    a1 = Action(act1)
    a2 = Action(act2)
    if a1 is None:
        return a2
    if a2 is None:
        return a1
    if isinstance(a1, ListAction):
        if isinstance(a2, ListAction):
            return ListAction(a1.list + a2.list)
        else:
            return ListAction(a1.list + [ a2 ])
    else:
        if isinstance(a2, ListAction):
            return ListAction([ a1 ] + a2.list)
        else:
            return ListAction([ a1, a2 ])