def get(self, id, pk='id', deleted=False):
        try:
            if pk == 'id':
                id = int(id)
            if deleted:
                spec = {pk: id}
            else:
                spec = {pk: id, 'data': {'$exists': 1}}
            fields = {'_id': 0}
            row = self.db.docs.find_one(spec, fields)
        except Exception as e:
            raise DatabaseException(e)
        if row:
            return Document(**row)
        raise NotFoundError('%s %s not found' % (pk, id))
def _model_ready_for_local_init(self, sess):
    """Checks if the model is ready to run local_init_op.

    Args:
      sess: A `Session`.

    Returns:
      A tuple (is_ready, msg), where is_ready is True if ready to run
      local_init_op and False otherwise, and msg is `None` if the model is
      ready to run local_init_op, a `String` with the reason why it is not ready
      otherwise.
    """
    return _ready(self._ready_for_local_init_op, sess,
                  "Model not ready for local init")