2021-12-02 20:06:28 +08:00
|
|
|
|
mindspore.dataset.SubsetRandomSampler
|
|
|
|
|
|
======================================
|
2021-11-27 16:09:05 +08:00
|
|
|
|
|
|
|
|
|
|
.. py:class:: mindspore.dataset.SubsetRandomSampler(indices, num_samples=None)
|
2021-11-23 15:00:48 +08:00
|
|
|
|
|
|
|
|
|
|
对索引序列中的元素进行随机采样。
|
|
|
|
|
|
|
2021-11-27 16:09:05 +08:00
|
|
|
|
**参数：**
|
|
|
|
|
|
|
|
|
|
|
|
- **indices** (Any iterable Python object but string): 索引的序列。
|
|
|
|
|
|
- **num_samples** (int, optional): 要采样的元素数量（默认值为None，采样所有元素）。
|
|
|
|
|
|
|
|
|
|
|
|
**样例：**
|
|
|
|
|
|
|
|
|
|
|
|
>>> indices = [0, 1, 2, 3, 7, 88, 119]
|
|
|
|
|
|
>>>
|
|
|
|
|
|
>>> # 创建一个SubsetRandomSampler，从提供的索引中采样
|
|
|
|
|
|
>>> sampler = ds.SubsetRandomSampler(indices)
|
|
|
|
|
|
>>> data = ds.ImageFolderDataset(image_folder_dataset_dir, num_parallel_workers=8, sampler=sampler)
|
|
|
|
|
|
|
|
|
|
|
|
**异常：**
|
|
|
|
|
|
|
2021-12-27 23:16:04 +08:00
|
|
|
|
- **TypeError：** `indices` 的类型不是整数。
|
2021-11-27 16:09:05 +08:00
|
|
|
|
- **TypeError：** `num_samples` 不是整数值。
|
|
|
|
|
|
- **ValueError：** `num_samples` 为负值。
|
2021-11-23 15:00:48 +08:00
|
|
|
|
|
|
|
|
|
|
.. include:: mindspore.dataset.BuiltinSampler.rst
|
