DatasetExistence¶

class lsst.daf.butler.DatasetExistence(value, names=None, *, module=None, qualname=None, type=None, start=1, boundary=None)¶

Bases: Flag

Flags representing the different states that a dataset can have in a Butler repository.

If a flag evaluates to True that will indicate that a dataset is present in the Butler repository. The different states for KNOWN and VERIFIED both evaluate to True and differ solely on whether the artifact was checked to make sure it exists or not.

Some flag are combinations of other flags, so in order to determine whether a dataset is present in datastore it is necessary to use logical AND.

exists = DatasetExistence.VERIFIED
if (DatasetExistence.DATASTORE & exists) == DatasetExistence.DATASTORE:
    # The datastore knows about this dataset.

Attributes Summary

`DATASTORE`	Known to the datastore.
`RECORDED`	Known to registry or equivalent.

Attributes Documentation

DATASTORE = 2¶

Known to the datastore.

Evaluates to False in Boolean context.

RECORDED = 1¶

Known to registry or equivalent.

Evaluates to False in Boolean context.

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DatasetExistence¶