Method _check_label_empty

catboost/python-package/catboost/core.py:969–974

Check label is not empty.

(self, label)

            raise CatBoostError("Invalid label type={}: must be array like.".format(type(label)))

    def _check_label_empty(self, label):
        """
        Check label is not empty.
        """
        if len(label) == 0:
            raise CatBoostError("Labels variable is empty.")

    def _check_label_shape(self, label, samples_count):
        """