Accordion dynamic

[Konstantinos Spanos]

Hello

I try to make a accordion,I get data from the base and I want to place them on the accordio dynamic,every element that comes from the bottom I put it under the other as one works one ListView.

when I use clear_widgets () it only shows me the new element that I get from the base

when I do not use it makes them dynamic but ιt shows me on a brown screen all
and it adds to me the last element since I call the function logically 

I do not know if I use the widget well

Thanks

an example I want to use a dynamic accordion

kv:

BoxLayout:

       orientation: 'vertical'

        id: all_orders

        size_hint_x: 0.9

        size_hint_y: None

        height: self.parent.height/1.4

        pos_hint: {'x': .05 , 'y': .1}

          Accordion:

              orientation: 'vertical'

              id:item_orders

              min_space: 30

python:

AccordionItem:

    id: acc_id

    title: '$acc_title'

    width : 640

    min_space: 20

    #BoxLayout:

    #    id:items

    Label:

        text: '$acc_content'

 ''')

     

        numrec = len(self.items_all)

        for product in self.items_all:

            

            acc_title = 'order'

            

            acc_content = ','.join([product['product_name'] for product in self.items_all])

            new_acc = self.tpitem.substitute(vars())

            

            acc = Builder.load_string(new_acc)

            self.item_orders.add_widget(acc)

[ZenCODE]

Please try posting a runnable example. It's hard to guess seeing only small parts of the code...