Attention

June 2024 Status Update: Removing DataPipes and DataLoader V2

We are re-focusing the torchdata repo to be an iterative enhancement of torch.utils.data.DataLoader. We do not plan on continuing development or maintaining the [DataPipes] and [DataLoaderV2] solutions, and they will be removed from the torchdata repo. We’ll also be revisiting the DataPipes references in pytorch/pytorch. In release torchdata==0.8.0 (July 2024) they will be marked as deprecated, and in 0.9.0 (Oct 2024) they will be deleted. Existing users are advised to pin to torchdata==0.8.0 or an older version until they are able to migrate away. Subsequent releases will not include DataPipes or DataLoaderV2. Please reach out if you suggestions or comments (please use this issue for feedback)

IoPathFileOpener

class torchdata.datapipes.iter.IoPathFileOpener(source_datapipe: IterDataPipe[str], mode: str = 'r', pathmgr=None, handler=None)

Opens files from input datapipe which contains pathnames or URLs, and yields a tuple of pathname and opened file stream (functional name: open_files_by_iopath).

Parameters:

• source_datapipe – Iterable DataPipe that provides the pathnames or URLs

• mode – An optional string that specifies the mode in which the file is opened ("r" by default)

• pathmgr – Custom iopath.PathManager. If not specified, a default PathManager is created.

Note

Default PathManager currently supports local file path, normal HTTP URL and OneDrive URL. S3 URL is supported only with iopath>=0.1.9.

Example:

from torchdata.datapipes.iter import IoPathFileLister

datapipe = IoPathFileLister(root=s3_url)
file_dp = datapipe.open_files_by_iopath()