def call_on_close(self, func):
        self._on_close.append(func)
        return func
initial voice verify service
dataset/ETHPy150Open Eforcers/gae-flask-todo/lib/werkzeug/wrappers.py/BaseResponse.call_on_close--crossover with--dataset/ETHPy150Open msopentechcn/open-hackathon/open-hackathon-server/src/hackathon/__init__.py/init_voice_verify