class AppBase(Widget):

    def Launcher(self, launchapp):
        os.system(launchapp)

    def BuildLayout(self):
        layout = GridLayout( rows=4, row_force_default = True, row_default_height = 100, col_force_default = True, col_default_width = 300 )
        with open('config.txt', 'rb') as f:
            reader = csv.reader(f, delimiter="|")
            for row in reader:
                launchbutton = Button( text = row[0], background_normal = 'tile.png', on_press = self.Launcher(row[1]) )
                layout.add_widget(launchbutton)
        return layout


class MyApp(App):

    def build(self):
        Config.set('graphics', 'width', 1920)
        Config.set('graphics', 'height', 400)
        return AppBase().BuildLayout()

if __name__ == '__main__':
    MyApp().run()

launchbutton = Button( text = row[0], background_normal = 'tile.png',
    on_press = self.Launcher(row[1])
)

launchbutton = Button( text = row[0], background_normal = 'tile.png',
    on_press = lambda: self.Launcher(row[1])
)

launchbutton = Button( text = row[0], background_normal = 'tile.png' )
launchbutton.bind( on_press = lambda widget: self.Launcher( row[1] ) )

funcs = []
for x in xrange(10):
    funcs.append( lambda: x)

funcs.append( lambda x=x: x)

funcs.append( lambda inner_x=x: inner_x)

launchbutton.bind( on_press = lambda widget, appname=row[1]: self.Launcher( appname ) )

```for i in list:
        button = ToggleButton(text=i[2],id=i[2],group='pBox')
        button.bind(lambda widget, text=i[2]: on_release=self.switch(PN))
        self.ids.patientBox.add_widget(button)```