class ReposoWidget(Widget):

    def __init__(self, *largs):
        super(ReposoWidget, self).__init__(*largs)
        ReposoRoot = GridLayout(cols = 9, rows = 5, padding = 100)
        self.getAnuncios(ReposoRoot)
        self.add_widget(ReposoRoot)


    def getAnuncios(self, ReposoRoot):
        ReposoRoot.add_widget(Button(text='Hello 1'))
        ReposoRoot.add_widget(Button(text='Hello 1'))
        ReposoRoot.add_widget(Button(text='Hello 1'))
        ReposoRoot.add_widget(Button(text='Hello 1'))
        ReposoRoot.add_widget(Button(text='Hello 1'))
        ReposoRoot.add_widget(Button(text='Hello 1'))
        ReposoRoot.add_widget(Button(text='Hello 1'))

class PanelApp(App):
        def build(self):
                Panel = BoxLayout()
                ReposoWid = ReposoWidget()
                Panel.add_widget(ReposoWid)
                return Panel