if 0 < self.dropout < 1 and self._dropout_mask is None:
    self._dropout_mask = _generate_dropout_mask(
        K.ones_like(inputs),
        self.dropout,
        training=training,
        count=4)
if (0 < self.recurrent_dropout < 1 and
        self._recurrent_dropout_mask is None):
    self._recurrent_dropout_mask = _generate_dropout_mask(
        K.ones_like(states[0]),
        self.recurrent_dropout,
        training=training,
        count=4)