gistfile1.py

_homescreen_frame_locator = ('css selector', 'iframe.homescreen')
_homescreen_landing_locator = ('id', 'landing-page')

 def _swipe_to_everything_me(self):

        hs_frame = self.marionette.find_element(*self._homescreen_frame_locator)
        self.marionette.switch_to_frame(hs_frame)

        landing_element = self.marionette.find_element(*self._homescreen_landing_locator)
        landing_element_x_centre = int(landing_element.size['width']/2)
        landing_element_y_centre = int(landing_element.size['height']/2)

        self.marionette.flick(landing_element, landing_element_x_centre, landing_element_y_centre, 300, 0, 800)