feat: add galaxy_table CSV reader/writer for galaxy populations#393
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Closes #392. Adds autogalaxy/galaxy/galaxy_table.py providing a typed schema layer over autoconf.csvable for CSV files describing galaxy populations (centres + luminosities + optional redshifts). Wraps the generic CSV I/O in autoconf and returns a GalaxyTable dataclass with centres: Grid2DIrregular, luminosities: list[float], redshifts: list[float] | None. Mirrors the typed-CSV-helper precedent in autolens.point.dataset (which owns the equivalent layer for point-source datasets) -- schema lives next to the typed object it describes. Consumers are the autolens_workspace scaling_relation examples (issue #141); the queued autogalaxy_extra_galaxies_audit follow-up will use it from autogalaxy_workspace too. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This was referenced May 10, 2026
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Workspace PR: PyAutoLabs/autolens_workspace#143 |
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Summary
Adds a typed CSV reader/writer for galaxy populations --
GalaxyTabledataclass plusgalaxy_table_from_csv/galaxy_table_to_csv. Schema columns arey, x, luminosity, redshift?. Wrapsautoconf.csvablefor the underlying I/O; partial-redshift handling mirrors the convention used byautolens.point.dataset.Closes #392.
API Changes
Purely additive. Three new public symbols on
autogalaxy:ag.GalaxyTable-- dataclass withcentres,luminosities,redshiftsfieldsag.galaxy_table_from_csv(file_path) -> GalaxyTableag.galaxy_table_to_csv(centres, luminosities, file_path, redshifts=None) -> NoneNo removals, no renames, no signature changes. See full details below.
Test Plan
pytest test_autogalaxy/galaxy/test_galaxy_table.py-- 10 tests covering round-trip with/without redshift, missing redshift column, partial-redshift rejection, extra columns ignored, row order preserved, empty/header-only CSV, mismatched-length writer rejection.import autogalaxy as ag; ag.galaxy_table_from_csvresolves via the namespace export.Full API Changes (for automation & release notes)
Added
autogalaxy.galaxy.galaxy_table.GalaxyTable-- dataclass:centres: Grid2DIrregular, luminosities: List[float], redshifts: Optional[List[float]] = Noneautogalaxy.galaxy.galaxy_table.galaxy_table_from_csv(file_path: Union[str, Path]) -> GalaxyTableautogalaxy.galaxy.galaxy_table.galaxy_table_to_csv(centres: Sequence[Tuple[float, float]], luminosities: Sequence[float], file_path: Union[str, Path], redshifts: Optional[Sequence[float]] = None) -> NoneAll three are re-exported at the
autogalaxynamespace top-level:ag.GalaxyTable,ag.galaxy_table_from_csv,ag.galaxy_table_to_csv.Removed
None.
Renamed
None.
Changed Signature
None.
Changed Behaviour
None.
Migration
No migration needed -- purely additive.
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