this is wrong. i couldn't just add L65 because child was outside of the scope. and i needed bind_selection_from_children = BooleanProperty(True) then i got two lists if i didn't delete the self.add_widget line

gistfile1.txt

class MyCompositeListItem(ButtonBehavior, CompositeListItem):

    bind_selection_from_children = BooleanProperty(True)

    def __init__(self, **kwargs):
        super(MyCompositeListItem, self).__init__(**kwargs)

        # There is an index to the data item this composite list item view
        # represents. Get it from kwargs and pass it along to children in the
        # loop below.
        index = kwargs['index']

        for cls_dict in kwargs['cls_dicts']:
            cls = cls_dict['cls']
            cls_kwargs = cls_dict.get('kwargs', None)

            if cls_kwargs:
                cls_kwargs['index'] = index

                if 'text' not in cls_kwargs:
                    cls_kwargs['text'] = kwargs['text']
            else:
                cls_kwargs = {}
                cls_kwargs['index'] = index
                if 'text' in kwargs:
                    cls_kwargs['text'] = kwargs['text']

            child = cls(**cls_kwargs)

            child.bind(on_release=self.on_release_on_child)


    def on_release_on_child(self, *args):
        self.trigger_action(duration=0)