loadCamera¶

lsst.obs.base.loadCamera(butler: Butler, dataId: DataCoordinate | Mapping[str, Any], *, collections: Any = None) → tuple[lsst.afw.cameraGeom.Camera, bool]¶

Attempt to load versioned camera geometry from a butler, but fall back to obtaining a nominal camera from the Instrument class if that fails.

Parameters:

butlerlsst.daf.butler.Butler: Butler instance to attempt to query for and load a camera dataset from.
dataIddict or DataCoordinate: Data ID that identifies at least the instrument and exposure dimensions.
collectionsAny, optional: Collections to be searched, overriding self.butler.collections. Can be any of the types supported by the collections argument to butler construction.

Returns:

cameralsst.afw.cameraGeom.Camera: Camera object.
versionedbool: If True, the camera was obtained from the butler and should represent a versioned camera from a calibration repository. If False, no camera datasets were found, and the returned camera was produced by instantiating the appropriate Instrument class and calling Instrument.getCamera.

Raises: