def __init__()

in source/frontend/viewer.py [0:0]


    def __init__(self, env):
        self.platform_system = platform.system()
        self.next_image = cv2.imread(self.NEXT_IMAGE_PATH)
        self.checking_image = cv2.imread(self.CHECKING_IMAGE_PATH)
        self.ok_image = cv2.imread(self.OK_IMAGE_PATH)
        if self.next_image is None or self.ok_image is None or self.checking_image is None:
            raise RuntimeError('Cannot load asset images')

        cv2.namedWindow(self.VIEWER_WINDOW_NAME,
                        cv2.WINDOW_KEEPRATIO | cv2.WINDOW_NORMAL)