refresh_archive_checksums

class tensordict.refresh_archive_checksums(archive_path: str | pathlib.Path)

Recomputes the CRC-32 checksums of a memmap archive after in-place writes.

A tensordict loaded with TensorDict.load_memmap(path, mode="r+") writes through to the archive without updating the CRC-32 that the zip format stores for each entry. load_memmap() itself never verifies checksums, so this is only needed before handing the modified archive to tools that do (unzip, zipfile, unpack_memmap()).

Parameters:

archive_path (str or Path) – path to the archive to fix up.

Returns:

the path to the archive.