Functions
def	checksum (obj, header=None, sumType="MD5")
	Calculate a checksum of an object. More...

Variables
tuple	exposureTypes = (afwImage.ExposureF, afwImage.ExposureD,)

tuple	maskedImageTypes = (afwImage.MaskedImageF, afwImage.MaskedImageD,)

tuple	decoratedImageTypes = (afwImage.DecoratedImageF, afwImage.DecoratedImageD,)

tuple	imageTypes = (afwImage.ImageF, afwImage.ImageD, afwImage.ImageI,)

int	PROTOCOL = 2

dictionary	sumFunctions

Function Documentation

◆ checksum()

def lsst.pipe.drivers.checksum.checksum	(	obj,
		header = `None`,
		sumType = `"MD5"`
	)

Calculate a checksum of an object.

We have special handling for images (e.g., breaking a MaskedImage into its various components), but the object may be any picklable type.

Parameters

obj	Object for which to calculate the checksum
header	FITS header (PropertyList) to update with checksum values, or None
sumType	Type of checksum to calculate

Returns: dict with header keyword,value pairs

Definition at line 24 of file checksum.py.

Variable Documentation

◆ decoratedImageTypes

tuple lsst.pipe.drivers.checksum.decoratedImageTypes = (afwImage.DecoratedImageF, afwImage.DecoratedImageD,)

Definition at line 12 of file checksum.py.

◆ exposureTypes

tuple lsst.pipe.drivers.checksum.exposureTypes = (afwImage.ExposureF, afwImage.ExposureD,)

Definition at line 10 of file checksum.py.

◆ imageTypes

tuple lsst.pipe.drivers.checksum.imageTypes = (afwImage.ImageF, afwImage.ImageD, afwImage.ImageI,)

Definition at line 13 of file checksum.py.

◆ maskedImageTypes

tuple lsst.pipe.drivers.checksum.maskedImageTypes = (afwImage.MaskedImageF, afwImage.MaskedImageD,)

Definition at line 11 of file checksum.py.

◆ PROTOCOL

int lsst.pipe.drivers.checksum.PROTOCOL = 2

Definition at line 15 of file checksum.py.

◆ sumFunctions

dictionary lsst.pipe.drivers.checksum.sumFunctions

Initial value:

 =  {
     "CRC32": lambda obj: zlib.crc32(pickle.dumps(obj, PROTOCOL)),
     "MD5": lambda obj: hashlib.md5(pickle.dumps(obj, PROTOCOL)).hexdigest(),
 }

Definition at line 18 of file checksum.py.

Functions

Variables