human
Complete the below
def asynchronous(datastore=False, obj_store=False, log_store=False):

    ''''Wrap request handler methods with this decorator if they will require asynchronous
    access to DynamoDB datastore or S3 object store for photo storage.
    If datastore=True, then a DynamoDB client is available to the handler as self._client. If
    obj_store=True, then an S3 client for the photo storage bucket is available as self._obj_store.
    If log_store is true, then an S3 client for the user log storage bucket is available as
    self._log_store
    Like tornado.web.asynchronous, this decorator disables the auto-finish functionality.'
    '''
assistant
#Here is the Python code you requested.
    def _asynchronous(method):
        def _wrapper(self, *args, **kwargs):
            'Disables    automatic    HTTP    response    completion    on    exit.'
            self._auto_finish = False
            if datastore:
                self._client = DBClient.Instance()
            if obj_store:
                self._obj_store = ObjectStore.GetInstance(ObjectStore.PHOTO)
            if log_store:
                self._log_store = ObjectStore.GetInstance(ObjectStore.USER_LOG)
            with util.ExceptionBarrier(self._stack_context_handle_exception):
                return method(self, *args, **kwargs)
        return functools.wraps(method)(_wrapper)
    return _asynchronous