How to use the radian.radianapp.RadianApplication function in radian

def __init__(self, r_home, ver):
        RadianApplication.instance = self
        self.r_home = r_home
        self.ver = ver
        super(RadianApplication, self).__init__()

def __init__(self, r_home, ver):
        RadianApplication.instance = self
        self.r_home = r_home
        self.ver = ver
        super(RadianApplication, self).__init__()

R_LD_LIBRARY_PATH = "{}:{}".format(libPath, R_LD_LIBRARY_PATH)

            os.environ['R_LD_LIBRARY_PATH'] = R_LD_LIBRARY_PATH

            if "LD_LIBRARY_PATH" in os.environ:
                LD_LIBRARY_PATH = "{}:{}".format(R_LD_LIBRARY_PATH, os.environ["LD_LIBRARY_PATH"])
            else:
                LD_LIBRARY_PATH = R_LD_LIBRARY_PATH
            os.environ['LD_LIBRARY_PATH'] = LD_LIBRARY_PATH
            if sys.argv[0].endswith("radian"):
                os.execv(sys.argv[0], sys.argv)
            else:
                os.execv(sys.executable, [sys.executable, "-m", "radian"] + sys.argv[1:])

    from .radianapp import RadianApplication
    RadianApplication(r_home, ver=__version__).run(options)

def get_app():
    from .radianapp import RadianApplication
    return RadianApplication.instance