# KeepUntilExpiry

## class nominal.core.KeepUntilExpiry(expiry_days)

Bases: [`object`](https://docs.python.org/3/builtins/functions.html#object "(in Python v3.15)")

Delete a dataset’s data once it is older than [`expiry_days`](https://dev.nominal.io/python/ref/generated/nominal.core.KeepUntilExpiry.md#nominal.core.KeepUntilExpiry.expiry_days "nominal.core.KeepUntilExpiry.expiry_days"), unless covered by an exemption.

### expiry_days: int

Age in days after which data becomes eligible for deletion.