forked from mindspore-Ecosystem/mindspore
update ops supporting tags
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mindspore.nn.MultilabelMarginLoss
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======================================
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.. py:class:: mindspore.nn.MultilabelMarginLoss(reduction="mean")
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创建一个损失函数,用于最小化多分类任务的基于边际的损失。
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它以一个2D mini-batch Tensor :math:`x` 作为输入,以包含目标类索引的2D Tensor :math:`y` 作为输出。
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对于每个小批量样本,loss值根据如下公式计算:
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.. math::
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\text{loss}(x, y) = \sum_{ij}\frac{\max(0, 1 - (x[y[j]] - x[i]))}{\text{x.size}(0)}
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其中 :math:`x \in \left\{0, \; \cdots , \; \text{x.size}(0) - 1\right\}`, \
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:math:`y \in \left\{0, \; \cdots , \; \text{y.size}(0) - 1\right\}`, \
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:math:`0 \leq y[j] \leq \text{x.size}(0)-1`, \
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并且 :math:`i \neq y[j]` 对于所有 :math:`i` and :math:`j` 。
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:math:`y` 和 :math:`x` shape必须相同。
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.. note::
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该算子仅考虑从前方开始的连续非负目标块。这允许不同的样本具有不同数量的目标类别。
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参数:
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- **reduction** (str,可选) - 指定应用于输出结果的规约计算方式。取值为"mean","sum",或"none"。默认值:"mean"。
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输入:
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- **x** (Tensor) - 预测值。hape为 :math:`(C)` 或 :math:`(N, C)`,其中 :math:`N`
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为批量大小,:math:`C` 为类别数。数据类型必须为:float16或float32。
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- **target** (Tensor) - 目标值,shape与 `inputs` 相同,数据类型必须为int32,标签目标由-1填充。
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输出:
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- **y** (Union[Tensor, Scalar]) - MultilabelMarginLoss损失。如果 `reduction` 的值为 "none",
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那么返回shape为 :math:`(N)` 的Tensor类型数据。否则返回一个标量。
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异常:
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- **TypeError** - 当 `inputs` 或者 `target` 数据不是Tensor时。
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- **TypeError** - 当 `inputs` 数据类型不是以下其中之一时:float16、float32。
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- **TypeError** - 当 `target` 数据类型不是int32时。
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- **ValueError** - 当 `inputs` 的数据维度不是以下其中之一时:1、2。
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- **ValueError** - 当 `inputs` 和 `target` 的shape不相同时。
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- **ValueError** - 当 `reduction` 的值不是以下其中之一时:'none'、 'mean'、 'sum'。
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@ -278,7 +278,7 @@ class MaxPool3d(Cell):
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ValueError: If `padding` is less than 0.
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Supported Platforms:
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``GPU``
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``Ascend`` ``GPU`` ``CPU``
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Examples:
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>>> import mindspore as ms
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@ -1519,12 +1519,12 @@ class CosineEmbeddingLoss(LossBase):
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class MultilabelMarginLoss(LossBase):
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r"""
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MultilabelMarginLoss operation.
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Creates a loss criterion that minimizes a margin-based loss for multi-class
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classification tasks.
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It takes a 2D mini-batch Tensor :math:`x` as input and a 2D
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Tensor :math:`y` containing target class indices as output.
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Creates a criterion that optimizes a multi-class multi-classification
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hinge loss (margin-based loss) between input :math:`x` (a 2D mini-batch `Tensor`)
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and output :math:`y` (which is a 2D `Tensor` of target class indices).
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For each sample in the mini-batch:
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Each sample in the mini-batch, the loss is computed as follows:
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.. math::
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\text{loss}(x, y) = \sum_{ij}\frac{\max(0, 1 - (x[y[j]] - x[i]))}{\text{x.size}(0)}
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@ -1532,17 +1532,18 @@ class MultilabelMarginLoss(LossBase):
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where :math:`x \in \left\{0, \; \cdots , \; \text{x.size}(0) - 1\right\}`, \
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:math:`y \in \left\{0, \; \cdots , \; \text{y.size}(0) - 1\right\}`, \
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:math:`0 \leq y[j] \leq \text{x.size}(0)-1`, \
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and :math:`i \neq y[j]` for all :math:`i` and :math:`j`.
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and for all :math:`i` and :math:`j`, :math:`i` does not equal to :math:`y[j]`.
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:math:`y` and :math:`x` must have the same size.
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Furthermore, both :math:`y` and :math:`x` should have identical sizes.
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The criterion only considers a contiguous block of non-negative targets that
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starts at the front.
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This allows for different samples to have variable amounts of target classes.
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.. note::
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For this operator, only a contiguous sequence of non-negative targets that starts at
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the beginning is taken into consideration, which means that different samples can have different
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number of target classes.
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Args:
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reduction (str): Apply specific reduction method to the output: 'none', 'mean', 'sum'. Default: "mean".
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reduction (str, optional): Apply specific reduction method to the output: 'none', 'mean', 'sum'.
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Default: "mean".
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Inputs:
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- **x** (Tensor) - Predict data. Tensor of shape :math:`(C)` or :math:`(N, C)`, where :math:`N`
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@ -1554,7 +1555,6 @@ class MultilabelMarginLoss(LossBase):
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- **y** (Union[Tensor, Scalar]) - The loss of MultilabelMarginLoss. If `reduction` is "none", its shape
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is :math:`(N)`. Otherwise, a scalar value will be returned.
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Raises:
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TypeError: If `x` or `target` is not a Tensor.
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TypeError: If dtype of `x` is neither float16 nor float32.
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@ -1289,7 +1289,7 @@ def searchsorted(sorted_sequence, values, *, out_int32=False, right=False):
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`sorted_sequence` and `values` are different.
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Supported Platforms:
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``CPU``
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``Ascend`` ``GPU`` ``CPU``
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Examples:
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>>> sorted_sequence = Tensor(np.array([[0, 1, 3, 5, 7], [2, 4, 6, 8, 10]]), mindspore.float32)
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@ -4178,7 +4178,7 @@ def affine_grid(theta, output_size, align_corners=False):
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ValueError: If the output_size[0] is not equal to the shape[0] of theta.
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Supported Platforms:
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``GPU``
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``Ascend`` ``GPU`` ``CPU``
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Examples:
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>>> import mindspore
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@ -4405,7 +4405,7 @@ def unsorted_segment_prod(x, segment_ids, num_segments):
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ValueError: If length of shape of `segment_ids` is not equal to 1.
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Supported Platforms:
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``Ascend`` ``GPU``
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``Ascend`` ``GPU`` ``CPU``
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Examples:
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>>> from mindspore import Tensor
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@ -4455,7 +4455,7 @@ def index_fill(x, axis, index, value):
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RuntimeError: If the values of `index` are out the range of `[-x.shape[axis], x.shape[axis]-1]`.
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Supported Platforms:
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``GPU``
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``Ascend`` ``GPU`` ``CPU``
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Examples:
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>>> import mindspore
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@ -5114,7 +5114,7 @@ def tril(input_x, diagonal=0): # pylint: disable=redefined-outer-name
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ValueError: If the rank of `x` is less than 2.
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Supported Platforms:
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``GPU`` ``CPU``
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``Ascend`` ``GPU`` ``CPU``
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Examples:
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>>> x = Tensor(np.array([[ 1, 2, 3, 4],
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@ -6158,7 +6158,7 @@ def mvlgamma(input, p):
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ValueError: If not all elements of `input` are greater than :math:`(p - 1) / 2`.
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Supported Platforms:
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``GPU`` ``CPU``
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``Ascend`` ``GPU`` ``CPU``
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Examples:
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>>> x = Tensor(np.array([[3, 4, 5], [4, 2, 6]]), mindspore.float32)
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@ -4424,7 +4424,7 @@ def orgqr(x, tau):
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ValueError: If rank(x) != 2 or 3.
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Supported Platforms:
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``Ascend`` ``CPU``
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``Ascend`` ``GPU`` ``CPU``
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Examples:
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>>> x = Tensor(np.array([[-114.6, 10.9, 1.1], [-0.304, 38.07, 69.38], [-0.45, -0.17, 62.]]), mindspore.float32)
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@ -4502,7 +4502,7 @@ def heaviside(x, values):
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ValueError: If shape of two inputs are not broadcastable.
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Supported Platforms:
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``GPU`` ``CPU``
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``Ascend`` ``GPU`` ``CPU``
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Examples:
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>>> x = Tensor(np.array([-5., 1., 0., 2., 0.]))
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@ -8565,7 +8565,7 @@ def roll(x, shifts, dims=None):
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TypeError: If `dims` is not an int, a tuple or a list.
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Supported Platforms:
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``GPU``
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``Ascend`` ``GPU``
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Examples:
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>>> import numpy as np
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@ -9886,7 +9886,7 @@ def isinf(input):
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TypeError: If `input` is not a Tensor.
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Supported Platforms:
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``GPU`` ``CPU``
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``Ascend`` ``GPU`` ``CPU``
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Examples:
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>>> x = Tensor(np.array([np.log(-1), 1, np.log(0)]), mindspore.float32)
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@ -2914,7 +2914,7 @@ def prelu(x, weight):
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ValueError: If the `weight` is not a 1-D Tensor.
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Supported Platforms:
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``Ascend`` ``GPU``
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``Ascend`` ``GPU`` ``CPU``
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Examples:
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>>> x = Tensor(np.arange(-6, 6).reshape((2, 3, 2)), mindspore.float32)
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ValueError: If `padding` is less than 0.
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Supported Platforms:
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``GPU``
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``Ascend`` ``GPU`` ``CPU``
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Examples:
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>>> x = Tensor(np.arange(2 * 1 * 2 * 2 * 2).reshape((2, 1, 2, 2, 2)), mindspore.float32)
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@ -4241,7 +4241,7 @@ def ctc_greedy_decoder(inputs, sequence_length, merge_repeated=True):
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ValueError: If value in the `sequence_length` is larger than `max_time`.
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Supported Platforms:
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``Ascend`` ``CPU``
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``Ascend`` ``GPU`` ``CPU``
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Examples:
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>>> inputs = Tensor(np.array([[[0.6, 0.4, 0.2], [0.8, 0.6, 0.3]],
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ValueError: If `reduction` is not one of 'none', 'mean', 'sum'.
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Supported Platforms:
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``Ascend``
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``Ascend`` ``GPU``
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Examples:
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>>> inputs = Tensor(np.array([[0.1, 0.2, 0.4, 0.8], [0.2, 0.3, 0.5, 0.7]]), mindspore.float32)
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@ -1222,7 +1222,7 @@ def multinomial(inputs, num_sample, replacement=True, seed=None):
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TypeError: If `seed` is neither an int nor an optional.
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Supported Platforms:
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``GPU``
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``Ascend`` ``GPU`` ``CPU``
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Examples:
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>>> import mindspore
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@ -151,7 +151,7 @@ class AdaptiveAvgPool3D(Primitive):
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Refer to :func:`mindspore.ops.adaptive_avg_pool3d` for more details.
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Supported Platforms:
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``GPU`` ``CPU``
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``Ascend`` ``GPU`` ``CPU``
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Examples:
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>>> import mindspore
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@ -2457,7 +2457,7 @@ class MaxPool3DWithArgmax(Primitive):
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ValueError: If `argmax_type` is not mindspore.int64 or mindspore.int32.
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Supported Platforms:
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``GPU``
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``Ascend`` ``GPU`` ``CPU``
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Examples:
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>>> x = Tensor(np.arange(2 * 1 * 2 * 2 * 2).reshape((2, 1, 2, 2, 2)), mindspore.float32)
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ValueError: If `reduction` is not one of 'none', 'mean', 'sum'.
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Supported Platforms:
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``Ascend`` ``GPU`` ``CPU``
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``GPU``
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Examples:
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>>> loss = ops.TripletMarginLoss()
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