cv2 Image of current window screen

def screen_cv2(self):
        """cv2 Image of current window screen"""
        pil_image = self.screen.convert('RGB')
        cv2_image = np.array(pil_image)
        pil_image.close()
        # Convert RGB to BGR 
        cv2_image = cv2_image[:, :, ::-1]
        return cv2_image