o ٭j^ @sdZddlZddlmZmZddlmZmZddlZ ddl m Z m Z m Z mZddlmZmZddlmZerProvide a different gradient type for finding tree structures.Nr)rrrrrrr split_grad<szTreeObjective.split_grad)rrrrrr rr rrrrr0s rarray n_samplesrcCsdt|}t|tjst|st||jd|kr/t|r/t dt | ||j |}t|tjrCt ||j\}}t|}|St|rMt|}|St|)NzHExpecting `np.ndarray` or `cupy.ndarray` for gradient and hessian. Got: rzvSince 2.1.0, the shape of the gradient and hessian is required to be (n_samples, n_targets) or (n_samples, n_classes).)type isinstancenpndarrayr TypeErrorshaperwarningswarn FutureWarningreshapesizerdtyper r )r!r"msg_ interfacerrr _grad_arrinfCs( r2)rr)abcrrtypingrrnumpyr% _data_utilsrrr r _typingr r compatr corerrrrbytesr2rrrrs