Registry¶

class lsst.daf.butler.Registry(registryConfig, schemaConfig=None, dimensionConfig=None, create=False)¶

Bases: object

Registry interface.

Parameters:	registryConfig : `RegistryConfig` Registry configuration. schemaConfig : `SchemaConfig`, optional Schema configuration. dimensionConfig : `DimensionConfig` or `Config` or `DimensionGraph` configuration.

Attributes Summary

`defaultConfigFile`	Path to configuration defaults.
`limited`	If True, this Registry does not maintain Dimension metadata or relationships (`bool`).
`pixelization`	Object that interprets SkyPix Dimension values (`lsst.sphgeom.Pixelization`).

Methods Summary

`addDataset`(datasetType, dataId, run[, …])	Adds a Dataset entry to the `Registry`
`addDatasetLocation`(ref, datastoreName)	Add datastore name locating a given dataset.
`addDimensionEntry`(dimension[, dataId, entry])	Add a new `Dimension` entry.
`addExecution`(execution)	Add a new `Execution` to the `Registry`.
`addQuantum`(quantum)	Add a new `Quantum` to the `Registry`.
`addRun`(run)	Add a new `Run` to the `Registry`.
`associate`(collection, refs)	Add existing Datasets to a collection, possibly creating the collection in the process.
`attachComponent`(name, parent, component)	Attach a component to a dataset.
`disassociate`(collection, refs[, remove])	Remove existing Datasets from a collection.
`ensureRun`(run)	Conditionally add a new `Run` to the `Registry`.
`expandDataId`([dataId, dimension, metadata, …])	Expand a data ID to include additional information.
`find`(collection, datasetType[, dataId])	Lookup a dataset.
`findDimensionEntry`(dimension[, dataId])	Return a `Dimension` entry corresponding to a `DataId`.
`fromConfig`(registryConfig[, schemaConfig, …])	Create `Registry` subclass instance from `config`.
`getDataset`(id)	Retrieve a Dataset entry.
`getDatasetLocations`(ref)	Retrieve datastore locations for a given dataset.
`getDatasetType`(name)	Get the `DatasetType`.
`getExecution`(id)	Retrieve an Execution.
`getQuantum`(id)	Retrieve an Quantum.
`getRun`([id, collection])	Get a `Run` corresponding to its collection or id
`makeDataIdPacker`(name[, dataId])	Create an object that can pack certain data IDs into integers.
`makeDatabaseDict`(table, types, key, value)	Construct a DatabaseDict backed by a table in the same database as this Registry.
`makeRun`(collection)	Create a new `Run` in the `Registry` and return it.
`markInputUsed`(quantum, ref)	Record the given `DatasetRef` as an actual (not just predicted) input of the given `Quantum`.
`packDataId`(name[, dataId, returnMaxBits])	Pack the given `DataId` into an integer.
`registerDatasetType`(datasetType)	Add a new `DatasetType` to the Registry.
`removeDatasetLocation`(datastoreName, ref)	Remove datastore location associated with this dataset.
`selectDimensions`(originInfo, expression, …)	Evaluate a filter expression and lists of `DatasetTypes` and return a set of data unit values.
`setConfigRoot`(root, config, full)	Set any filesystem-dependent config options for this Registry to be appropriate for a new empty repository with the given root.
`setDimensionRegion`([dataId, update, region])	Set the region field for a Dimension instance or a combination thereof and update associated spatial join tables.
`transaction`()	Optionally implemented in `Registry` subclasses to provide exception safety guarantees in case an exception is raised in the enclosed block.

Attributes Documentation

defaultConfigFile = None¶: Path to configuration defaults. Relative to $DAF_BUTLER_DIR/config or absolute path. Can be None if no defaults specified.

limited¶: If True, this Registry does not maintain Dimension metadata or relationships (bool).

pixelization¶

Object that interprets SkyPix Dimension values (lsst.sphgeom.Pixelization).

None for limited registries.

Methods Documentation

addDataset(datasetType, dataId, run, producer=None, recursive=False, **kwds)¶

Adds a Dataset entry to the Registry

This always adds a new Dataset; to associate an existing Dataset with a new collection, use associate.

Parameters:	datasetType : `DatasetType` or `str` A `DatasetType` or the name of one. dataId : `dict` or `DataId` A `dict`-like object containing the `Dimension` links that identify the dataset within a collection. run : `Run` The `Run` instance that produced the Dataset. Ignored if `producer` is passed (`producer.run` is then used instead). A Run must be provided by one of the two arguments. producer : `Quantum` Unit of work that produced the Dataset. May be `None` to store no provenance information, but if present the `Quantum` must already have been added to the Registry. recursive : `bool` If True, recursively add Dataset and attach entries for component Datasets as well. kwds Additional keyword arguments passed to the `DataId` constructor to convert `dataId` to a true `DataId` or augment an existing one.
Returns:	ref : `DatasetRef` A newly-created `DatasetRef` instance.
Raises:	ValueError If a Dataset with the given `DatasetRef` already exists in the given collection. Exception If `dataId` contains unknown or invalid `Dimension` entries.

addDatasetLocation(ref, datastoreName)¶

Add datastore name locating a given dataset.

Typically used by Datastore.

Parameters:	ref : `DatasetRef` A reference to the dataset for which to add storage information. datastoreName : `str` Name of the datastore holding this dataset.

addDimensionEntry(dimension, dataId=None, entry=None, **kwds)¶

Add a new Dimension entry.

dimension : str or Dimension: Either a Dimension object or the name of one.
dataId : dict or DataId, optional: A dict-like object containing the Dimension links that form the primary key of the row to insert. If this is a full DataId object, dataId.entries[dimension] will be updated with entry and then inserted into the Registry.
entry : dict: Dictionary that maps column name to column value.
kwds: Additional keyword arguments passed to the DataId constructor to convert dataId to a true DataId or augment an existing one.

If values includes a “region” key, setDimensionRegion will automatically be called to set it any associated spatial join tables. Region fields associated with a combination of Dimensions must be explicitly set separately.

Returns:	dataId : `DataId` A Data ID for exactly the given dimension that includes the added entry.
Raises:	TypeError If the given `Dimension` does not have explicit entries in the registry. ValueError If an entry with the primary-key defined in `values` is already present. NotImplementedError Raised if `limited` is `True`.

addExecution(execution)¶

Add a new Execution to the Registry.

If execution.id is None the Registry will update it to that of the newly inserted entry.

Parameters:	execution : `Execution` Instance to add to the `Registry`. The given `Execution` must not already be present in the `Registry`.
Raises:	Exception If `Execution` is already present in the `Registry`.

addQuantum(quantum)¶

Add a new Quantum to the Registry.

Parameters:	quantum : `Quantum` Instance to add to the `Registry`. The given `Quantum` must not already be present in the `Registry` (or any other), therefore its: `run` attribute must be set to an existing `Run`. `predictedInputs` attribute must be fully populated with `DatasetRef`s, and its. `actualInputs` and `outputs` will be ignored.

addRun(run)¶

Add a new Run to the Registry.

Parameters:	run : `Run` Instance to add to the `Registry`. The given `Run` must not already be present in the `Registry` (or any other). Therefore its `id` must be `None` and its `collection` must not be associated with any existing `Run`.
Raises:	ValueError If a run already exists with this collection.

associate(collection, refs)¶

Add existing Datasets to a collection, possibly creating the collection in the process.

Parameters:	collection : `str` Indicates the collection the Datasets should be associated with. refs : `list` of `DatasetRef` A `list` of `DatasetRef` instances that already exist in this `Registry`.

attachComponent(name, parent, component)¶

Attach a component to a dataset.

Parameters:	name : `str` Name of the component. parent : `DatasetRef` A reference to the parent dataset. Will be updated to reference the component. component : `DatasetRef` A reference to the component dataset.

disassociate(collection, refs, remove=True)¶

Remove existing Datasets from a collection.

collection and ref combinations that are not currently associated are silently ignored.

Parameters:	collection : `str` The collection the Datasets should no longer be associated with. refs : `list` of `DatasetRef` A `list` of `DatasetRef` instances that already exist in this `Registry`. remove : `bool` If `True`, remove Datasets from the `Registry` if they are not associated with any collection (including via any composites).
Returns:	removed : `list` of `DatasetRef` If `remove` is `True`, the `list` of `DatasetRef`s that were removed.

ensureRun(run)¶

Conditionally add a new Run to the Registry.

If the run.id is None or a Run with this id doesn’t exist in the Registry yet, add it. Otherwise, ensure the provided run is identical to the one already in the registry.

Parameters:	run : `Run` Instance to add to the `Registry`.
Raises:	ValueError If `run` already exists, but is not identical.

expandDataId(dataId=None, *, dimension=None, metadata=None, region=False, update=False, **kwds)¶

Expand a data ID to include additional information.

expandDataId always returns a true DataId and ensures that its entries dict contains (at least) values for all implied dependencies.

Parameters:	dataId : `dict` or `DataId` A `dict`-like object containing the `Dimension` links that include the primary keys of the rows to query. If this is a true `DataId`, the object will be updated in-place. dimension : `Dimension` or `str` A dimension passed to the `DataId` constructor to create a true `DataId` or augment an existing one. metadata : `collections.abc.Mapping`, optional A mapping from `Dimension` or `str` name to column name, indicating fields to read into `dataId.entries`. If `dimension` is provided, may instead be a sequence of column names for that dimension. region : `bool` If `True` and the given `DataId` is uniquely associated with a region on the sky, obtain that region from the `Registry` and attach it as `dataId.region`. update : `bool` If `True`, assume existing entries and regions in the given `DataId` are out-of-date and should be updated by values in the database. If `False`, existing values will be assumed to be correct and database queries will only be executed if they are missing. kwds Additional keyword arguments passed to the `DataId` constructor to convert `dataId` to a true `DataId` or augment an existing one.
Returns:	dataId : `DataId` A Data ID with its `region` attribute set.
Raises:	NotImplementedError Raised if `limited` is `True`.

find(collection, datasetType, dataId=None, **kwds)¶

Lookup a dataset.

This can be used to obtain a DatasetRef that permits the dataset to be read from a Datastore.

Parameters:	collection : `str` Identifies the collection to search. datasetType : `DatasetType` or `str` A `DatasetType` or the name of one. dataId : `dict` or `DataId`, optional A `dict`-like object containing the `Dimension` links that identify the dataset within a collection. kwds Additional keyword arguments passed to the `DataId` constructor to convert `dataId` to a true `DataId` or augment an existing one.
Returns:	ref : `DatasetRef` A ref to the Dataset, or `None` if no matching Dataset was found.
Raises:	ValueError If dataId is invalid.

findDimensionEntry(dimension, dataId=None, **kwds)¶

Return a Dimension entry corresponding to a DataId.

Parameters:	dimension : `str` or `Dimension` Either a `Dimension` object or the name of one. dataId : `dict` or `DataId`, optional A `dict`-like object containing the `Dimension` links that form the primary key of the row to retreive. If this is a full `DataId` object, `dataId.entries[dimension]` will be updated with the entry obtained from the `Registry`. kwds Additional keyword arguments passed to the `DataId` constructor to convert `dataId` to a true `DataId` or augment an existing one.
Returns:	entry : `dict` Dictionary with all `Dimension` values, or `None` if no matching entry is found. `None` if there is no entry for the given `DataId`.
Raises:	NotImplementedError Raised if `limited` is `True`.

static fromConfig(registryConfig, schemaConfig=None, dimensionConfig=None, create=False)¶

Create Registry subclass instance from config.

Uses registry.cls from config to determine which subclass to instantiate.

Parameters:

registryConfig : ButlerConfig, RegistryConfig, Config or str: Registry configuration
schemaConfig : SchemaConfig, Config or str, optional.: Schema configuration. Can be read from supplied registryConfig if the relevant component is defined and schemaConfig is None.
dimensionConfig : DimensionConfig or Config or: str, optional. DimensionGraph configuration. Can be read from supplied registryConfig if the relevant component is defined and dimensionConfig is None.
create : bool: Assume empty Registry and create a new one.

Returns:

registry : Registry (subclass): A new Registry subclass instance.

getDataset(id)¶

Retrieve a Dataset entry.

Parameters:	id : `int` The unique identifier for the Dataset.
Returns:	ref : `DatasetRef` A ref to the Dataset, or `None` if no matching Dataset was found.

getDatasetLocations(ref)¶

Retrieve datastore locations for a given dataset.

Typically used by Datastore.

Parameters:	ref : `DatasetRef` A reference to the dataset for which to retrieve storage information.
Returns:	datastores : `set` of `str` All the matching datastores holding this dataset. Empty set if the dataset does not exist anywhere.

getDatasetType(name)¶

Get the DatasetType.

Parameters:	name : `str` Name of the type.
Returns:	type : `DatasetType` The `DatasetType` associated with the given name.
Raises:	KeyError Requested named DatasetType could not be found in registry.

getExecution(id)¶

Retrieve an Execution.

Parameters:	id : `int` The unique identifier for the Execution.

getQuantum(id)¶

Retrieve an Quantum.

Parameters:	id : `int` The unique identifier for the Quantum.

getRun(id=None, collection=None)¶

Get a Run corresponding to its collection or id

Parameters:	id : `int`, optional Lookup by run `id`, or: collection : `str` If given, lookup by `collection` name instead.
Returns:	run : `Run` The `Run` instance.
Raises:	ValueError Must supply one of `collection` or `id`.

makeDataIdPacker(name, dataId=None, **kwds)¶

Create an object that can pack certain data IDs into integers.

Parameters:	name : `str` Name of the packer, as given in the `Registry` configuration. dataId : `dict` or `DataId`, optional Data ID that identifies at least the “given” dimensions of the packer. kwds Addition keyword arguments used to augment or override the given data ID.
Returns:	packer : `DataIdPacker` Instance of a subclass of `DataIdPacker`.

makeDatabaseDict(table, types, key, value)¶

Construct a DatabaseDict backed by a table in the same database as this Registry.

Parameters:

table : table: Name of the table that backs the returned DatabaseDict. If this table already exists, its schema must include at least everything in types.
types : dict: A dictionary mapping str field names to type objects, containing all fields to be held in the database.
key : str: The name of the field to be used as the dictionary key. Must not be present in value._fields.
value : type: The type used for the dictionary’s values, typically a namedtuple. Must have a _fields class attribute that is a tuple of field names (i.e. as defined by namedtuple); these field names must also appear in the types arg, and a _make attribute to construct it from a sequence of values (again, as defined by namedtuple).

makeRun(collection)¶

Create a new Run in the Registry and return it.

If a run with this collection already exists, return that instead.

Parameters:	collection : `str` The collection used to identify all inputs and outputs of the `Run`.
Returns:	run : `Run` A new `Run` instance.

markInputUsed(quantum, ref)¶

Record the given DatasetRef as an actual (not just predicted) input of the given Quantum.

This updates both the Registry”s Quantum table and the Python Quantum.actualInputs attribute.

Parameters:	quantum : `Quantum` Producer to update. Will be updated in this call. ref : `DatasetRef` To set as actually used input.
Raises:	KeyError If `quantum` is not a predicted consumer for `ref`.

packDataId(name, dataId=None, *, returnMaxBits=False, **kwds)¶

Pack the given DataId into an integer.

Parameters:	name : `str` Name of the packer, as given in the `Registry` configuration. dataId : `dict` or `DataId`, optional Data ID that identifies at least the “required” dimensions of the packer. returnMaxBits : `bool` If `True`, return a tuple of `(packed, self.maxBits)`. kwds Addition keyword arguments used to augment or override the given data ID.
Returns:	packed : `int` Packed integer ID. maxBits : `int`, optional Maximum number of nonzero bits in `packed`. Not returned unless `returnMaxBits` is `True`.

registerDatasetType(datasetType)¶

Add a new DatasetType to the Registry.

It is not an error to register the same DatasetType twice.

Parameters:	datasetType : `DatasetType` The `DatasetType` to be added.
Returns:	inserted : `bool` `True` if `datasetType` was inserted, `False` if an identical existing `DatsetType` was found.
Raises:	ValueError DatasetType is not valid for this registry or is already registered but not identical.

removeDatasetLocation(datastoreName, ref)¶

Remove datastore location associated with this dataset.

Typically used by Datastore when a dataset is removed.

Parameters:	datastoreName : `str` Name of this `Datastore`. ref : `DatasetRef` A reference to the dataset for which information is to be removed.

selectDimensions(originInfo, expression, neededDatasetTypes, futureDatasetTypes, expandDataIds=True)¶

Evaluate a filter expression and lists of DatasetTypes and return a set of data unit values.

Returned set consists of combinations of units participating in data transformation from neededDatasetTypes to futureDatasetTypes, restricted by existing data and filter expression.

Parameters:	originInfo : `DatasetOriginInfo` Object which provides names of the input/output collections. expression : `str` An expression that limits the `Dimensions` and (indirectly) the Datasets returned. neededDatasetTypes : `list` of `DatasetType` or `str` The `list` of `DatasetTypes` whose Dimensions will be included in the returned column set. Output is limited to the the Datasets of these DatasetTypes which already exist in the registry. futureDatasetTypes : `list` of `DatasetType` or `str` The `list` of `DatasetTypes` whose Dimensions will be included in the returned column set. It is expected that Datasets for these DatasetTypes do not exist in the registry, but presently this is not checked. expandDataIds : `bool` If `True` (default), expand all data IDs when returning them.
Yields:	row : `PreFlightUnitsRow` Single row is a unique combination of units in a transform.
Raises:	NotImplementedError Raised if `limited` is `True`.

classmethod setConfigRoot(root, config, full)¶

Set any filesystem-dependent config options for this Registry to be appropriate for a new empty repository with the given root.

Parameters:

root : str: Filesystem path to the root of the data repository.
config : Config: A Config to update. Only the subset understood by this component will be updated. Will not expand defaults.
full : Config: A complete config with all defaults expanded that can be converted to a RegistryConfig. Read-only and will not be modified by this method. Repository-specific options that should not be obtained from defaults when Butler instances are constructed should be copied from full to Config.

setDimensionRegion(dataId=None, *, update=True, region=None, **kwds)¶

Set the region field for a Dimension instance or a combination thereof and update associated spatial join tables.

Parameters:	dataId : `dict` or `DataId` A `dict`-like object containing the `Dimension` links that form the primary key of the row to insert or update. If this is a full `DataId`, `dataId.region` will be set to `region` (if `region` is not `None`) and then used to update or insert into the `Registry`. update : `bool` If True, existing region information for these Dimensions is being replaced. This is usually required because Dimension entries are assumed to be pre-inserted prior to calling this function. region : `lsst.sphgeom.ConvexPolygon`, optional The region to update or insert into the `Registry`. If not present `dataId.region` must not be `None`. kwds Additional keyword arguments passed to the `DataId` constructor to convert `dataId` to a true `DataId` or augment an existing one.
Returns:	dataId : `DataId` A Data ID with its `region` attribute set.
Raises:	NotImplementedError Raised if `limited` is `True`.

transaction()¶

Optionally implemented in Registry subclasses to provide exception safety guarantees in case an exception is raised in the enclosed block.

This context manager may be nested (e.g. any implementation by a Registry subclass must nest properly).

Warning

The level of exception safety is not guaranteed by this API. It may implement stong exception safety and roll back any changes leaving the state unchanged, or it may do nothing leaving the underlying Registry corrupted. Depending on the implementation in the subclass.

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Registry¶