lsst.dax.apdb.apdbCassandra.Partitioner Class Reference

Public Member Functions
def	__init__ (self, ApdbCassandraConfig config)
List[int]	pixels (self, sphgeom.Region region)
int	pixel (self, sphgeom.UnitVector3d direction)

Public Attributes
	pixelator

Detailed Description

Class that calculates indices of the objects for partitioning.

Used internally by `ApdbCassandra`

Parameters
----------
config : `ApdbCassandraConfig`

Definition at line 196 of file apdbCassandra.py.

Constructor & Destructor Documentation

__init__()

def lsst.dax.apdb.apdbCassandra.Partitioner.__init__	(		self,
		ApdbCassandraConfig	config
	)

Definition at line 205 of file apdbCassandra.py.

    def __init__(self, config: ApdbCassandraConfig):
        pix = config.part_pixelization
        if pix == "htm":
            self.pixelator = sphgeom.HtmPixelization(config.part_pix_level)
        elif pix == "q3c":
            self.pixelator = sphgeom.Q3cPixelization(config.part_pix_level)
        elif pix == "mq3c":
            self.pixelator = sphgeom.Mq3cPixelization(config.part_pix_level)
        else:
            raise ValueError(f"unknown pixelization: {pix}")
 

Member Function Documentation

pixel()

int lsst.dax.apdb.apdbCassandra.Partitioner.pixel	(		self,
		sphgeom.UnitVector3d	direction
	)

Compute the index of the pixel for given direction.

Parameters
----------
direction : `lsst.sphgeom.UnitVector3d`

Definition at line 230 of file apdbCassandra.py.

    def pixel(self, direction: sphgeom.UnitVector3d) -> int:
        """Compute the index of the pixel for given direction.
 
        Parameters
        ----------
        direction : `lsst.sphgeom.UnitVector3d`
        """
        index = self.pixelator.index(direction)
        return index
 
 

pixels()

List[int] lsst.dax.apdb.apdbCassandra.Partitioner.pixels	(		self,
		sphgeom.Region	region
	)

Compute set of the pixel indices for given region.

Parameters
----------
region : `lsst.sphgeom.Region`

Definition at line 216 of file apdbCassandra.py.

    def pixels(self, region: sphgeom.Region) -> List[int]:
        """Compute set of the pixel indices for given region.
 
        Parameters
        ----------
        region : `lsst.sphgeom.Region`
        """
        # we want finest set of pixels, so ask as many pixel as possible
        ranges = self.pixelator.envelope(region, 1_000_000)
        indices = []
        for lower, upper in ranges:
            indices += list(range(lower, upper))
        return indices
 

Member Data Documentation

pixelator

lsst.dax.apdb.apdbCassandra.Partitioner.pixelator

Definition at line 208 of file apdbCassandra.py.

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The documentation for this class was generated from the following file:

• /j/snowflake/release/lsstsw/stack/lsst-scipipe-0.7.0/Linux64/dax_apdb/22.0.1-5-g75bb458+99c117b92f/python/lsst/dax/apdb/apdbCassandra.py