lsst.datarel.utils Namespace Reference

Functions
def	getDataset
def	getPsf

Function Documentation

def lsst.datarel.utils.getDataset	(		butler,
			dataset,
			dataId,
			strict,
			warn
	)

Get a dataset from a repository with an optional exception or warning if not found

@param[in] butler: data butler
@param[in] dataset: name of desired dataset
@param[in] dataId: data ID dict
@param[in] strict: if True then raise RuntimeError if dataset not found
@param[in] warn: if True and strict False then print a warning to stderr if dataset not found

@raise RuntimeError if dataset not found and strict true

Definition at line 27 of file utils.py.

def getDataset(butler, dataset, dataId, strict, warn):
    """Get a dataset from a repository with an optional exception or warning if not found

    @param[in] butler: data butler
    @param[in] dataset: name of desired dataset
    @param[in] dataId: data ID dict
    @param[in] strict: if True then raise RuntimeError if dataset not found
    @param[in] warn: if True and strict False then print a warning to stderr if dataset not found
    
    @raise RuntimeError if dataset not found and strict true
    """
    try:
        ds = butler.get(dataset, dataId=dataId, immediate=True)
    except:
        ds = None
    if ds == None:
        msg = '{} : Failed to retrieve {} dataset'.format(dataId, dataset)
        if strict:
            raise RuntimeError(msg)
        elif warn:
            print >>sys.stderr, '*** Skipping ' + msg
    return ds