persistent dataset default `cache_dir`

**Is your feature request related to a problem? Please describe.**
https://github.com/Project-MONAI/MONAI/blob/45c6cf6117d2e25e88272a7001d84696e449a1cc/monai/data/dataset.py#L136-L142
the default value of `cache_dir` is `None`, which means no caching. this is somewhat unexpected for a caching based dataset.

**Describe the solution you'd like**
remove the default value so that the user has to provide a location for the cache files


	def __init__(
	self,
	data: Sequence,
	transform: Union[Sequence[Callable], Callable],
	cache_dir: Optional[Union[Path, str]] = None,
	hash_func: Callable[..., bytes] = pickle_hashing,
	) -> None:

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

persistent dataset default `cache_dir` #2136

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

persistent dataset default cache_dir #2136

Description

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions

persistent dataset default `cache_dir` #2136