face_cascade = cv2.CascadeClassifier('haarcascade_frontalface_alt.xml')

def resource_path(relative_path):
    try:
        base_path = sys._MEIPASS
    except Exception:
        base_path = os.path.abspath(".")

    return os.path.join(base_path, relative_path)


face_cascade = cv2.CascadeClassifier(resource_path('haarcascade_frontalface_alt.xml'))