gistfile1.txt

def select_layer(layer_name, add=False):
    # type: (Text, bool) -> None

    if not add:
        for layer in get_all_layers():
            deselect_layer(layer)

    if "BaseAnimation" == layer_name:
        layer_name = next((x for x in get_all_layers() if "BaseAnimation" in x), layer_name)

    def __inner(__layer_name):
        cmds.animLayer(forceUIRebuild=True)
        cmds.animLayer(forceUIRefresh=True)
        cmds.animLayer(
            __layer_name, edit=True, lock=False, mute=False, selected=True, preferred=True
        )
        cmds.animLayer(forceUIRebuild=True)
        cmds.animLayer(forceUIRefresh=True)

    __inner(layer_name)
    
def deselect_layer(layer):
    # type: (Text) -> None
    if "BaseAnimation" in layer:
        cmds.animLayer(layer, edit=True, preferred=False, selected=False)

    else:
        cmds.animLayer(layer, edit=True, preferred=False, selected=False)


def get_all_layers(layer_name=None):
    # type: (Optional[Text]) -> List[Text]
    layers = cmds.ls(type="animLayer") or []
    layers = sorted(layers, key=lambda x: 0 if "baseanimation" in x.lower() else 1)
    if layer_name is not None:
        layers = [_l for _l in layers if layer_name in _l]

    return layers