2021-11-27 16:09:05 +08:00
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mindspore.dataset.SequentialSampler
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===================================
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.. py:class:: mindspore.dataset.SequentialSampler(start_index=None, num_samples=None)
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2021-11-23 15:00:48 +08:00
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按顺序采样数据集元素，相当于不使用采样器。
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2021-11-27 16:09:05 +08:00
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**参数：**
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- **start_index** (int, optional): 开始采样的索引。（默认值为None，从第一个ID开始）
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- **num_samples** (int, optional): 要采样的元素数量。（默认值为None，采样所有元素）
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2021-12-05 16:06:57 +08:00
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**样例：**
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2021-11-27 16:09:05 +08:00
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>>> # 创建SequentialSampler
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>>> sampler = ds.SequentialSampler()
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>>> dataset = ds.ImageFolderDataset(image_folder_dataset_dir,
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... num_parallel_workers=8,
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... sampler=sampler)
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**异常：**
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- **TypeError：** `start_index` 不是整数值。
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- **TypeError：** `num_samples` 不是整数值。
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2021-12-02 20:06:28 +08:00
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- **RuntimeError：** `start_index` 为负值。
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2021-11-27 16:09:05 +08:00
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- **ValueError：** `num_samples` 为负值。
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2021-11-23 15:00:48 +08:00
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.. include:: mindspore.dataset.BuiltinSampler.rst
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