PSFExSerializationModel

pydantic model lsst.images.psfs.PSFExSerializationModel

Serialization model for PSFEx PSFs.

Parameters:

data (Any)

Fields:

• average_x (float)

• average_y (float)

• basis (list[float])

• bounds (BoundsSerializationModel)

• butler_info (lsst.images.serialization._common.ButlerInfo | None)

• coeff (list[float])

• context (InlineArray)

• degree (list[int])

• group (list[int])

• indirect (list[Any])

• metadata (dict[str, MetadataValue])

• min_read_version (int)

• parameters (lsst.images.serialization._asdf_utils.ArrayReferenceModel | lsst.images.serialization._asdf_utils.InlineArrayModel)

• pixel_step (float)

• schema_version (str)

Validators:

• _check_and_normalize_schema_version » all fields

field average_x: float [Required]

Average X position of the stars used to build this PSF model.

Validated by:

• _check_and_normalize_schema_version

field average_y: float [Required]

Average Y position of the stars used to build this PSF model.

Validated by:

• _check_and_normalize_schema_version

field basis: list[float] [Required]

Basis function values.

Validated by:

• _check_and_normalize_schema_version

field bounds: BoundsSerializationModel [Required]

Validity range for this PSF model.

Validated by:

• _check_and_normalize_schema_version

field butler_info: ButlerInfo | None = None

Information about the butler dataset backed by this file.

Validated by:

• _check_and_normalize_schema_version

field coeff: list[float] [Required]

Polynomial coefficients.

Validated by:

• _check_and_normalize_schema_version

field context: serialization.InlineArray [Required]

Internal PSFEx context array.

Validated by:

• _check_and_normalize_schema_version

field degree: list[int] [Required]

Polynomial degree for each model group.

Validated by:

• _check_and_normalize_schema_version

field group: list[int] [Optional]

Number of model groups in each dimension.

Validated by:

• _check_and_normalize_schema_version

field indirect: list[Any] [Optional]

Serialized nested objects that may be saved or read more than once.

Validated by:

• _check_and_normalize_schema_version

field metadata: dict[str, MetadataValue] [Optional]

Additional unstructured metadata.

Validated by:

• _check_and_normalize_schema_version

field min_read_version: int = 1

Smallest reader major that can interpret this tree.

Validated by:

• _check_and_normalize_schema_version

field parameters: serialization.ArrayReferenceModel | serialization.InlineArrayModel [Required]

Reference to an array with the complete model parameters.

Validated by:

• _check_and_normalize_schema_version

field pixel_step: float [Required]

Size of a model pixel, as a fraction or multiple of the native pixel size.

Validated by:

• _check_and_normalize_schema_version

field schema_version: str = '1.0.0'

Data-model schema version of this tree (major.minor.patch).

Validated by:

• _check_and_normalize_schema_version

PUBLIC_TYPE

alias of PSFExWrapper

deserialize(archive, **kwargs)

Deserialize the PSF from an archive.

This method is intended to be usable as the callback function passed to serialization.InputArchive.deserialize_pointer.

Parameters:

• archive (InputArchive[Any]) – Archive to read from.

• **kwargs (Any) – Unsupported keyword arguments are accepted only to provide better error messages (raising serialization.InvalidParameterError).

Return type:

PSFExWrapper

deserialize_component(component, archive, **kwargs)

Return a component in-memory object that was serialized to this tree.

Parameters:

• component (str) – Name of the component to read.

• archive (InputArchive[Any]) – The input archive to read from.

• **kwargs (Any) – Additional keyword arguments specific to this type.

Raises:

• InvalidComponentError – Raise if component is not recognized.

• InvalidParameterError – Raised for unsupported **kwargs.

Return type:

Any

Notes

The default implementation for this method tries to get an attribute with the component’s name from self, and then:

• returns None if it is None;

• calls deserialize on that object if it is also an ArchiveTree;

• returns it directly otherwise.

If there is no such attribute, it raises InvalidComponentError.

**kwargs are forwarded to component deserialize methods, but are otherwise not checked. Subclasses are generally expected to implement this method to do that checking and handle any components for which the other will not work, and then delegate to super at the end.

MIN_READ_VERSION: ClassVar[int] = 1

SCHEMA_NAME: ClassVar[str] = 'psfex_psf'

SCHEMA_URL_BASE: ClassVar[str] = 'https://images.lsst.io/schemas'

Base for this schema’s URL, as {SCHEMA_URL_BASE}/{name}-{version}.

External packages providing their own schemas should override this (once, on a shared intermediate base class) so their schema URLs are minted under a documentation site they control rather than images.lsst.io.

SCHEMA_VERSION: ClassVar[str] = '1.0.0.dev0'

property schema_url: str

Return the schema URL of this tree’s class.

Computed from SCHEMA_NAME and SCHEMA_VERSION ClassVars.