Coverage for python/lsst/faro/base/BaseSubTasks.py : 43%

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1import astropy.units as u
2import numpy as np
3from lsst.pipe.base import Struct, Task
4from lsst.pex.config import Config, Field
5from lsst.verify import Measurement
7__all__ = ('NumSourcesTask', 'NumpySummaryTaskConfig', 'NumpySummaryTask')
10class NumSourcesTask(Task):
12 ConfigClass = Config
13 _DefaultName = "numSourcesTask"
15 def run(self, catalog, metric_name, vIds=None):
16 self.log.info(f"Measuring {metric_name}")
17 nSources = len(catalog)
18 meas = Measurement("nsrcMeas", nSources * u.count)
19 return Struct(measurement=meas)
22class NumpySummaryTaskConfig(Config):
23 summary = Field(dtype=str, default="median",
24 doc="Aggregation to use for summary metrics")
27class NumpySummaryTask(Task):
29 ConfigClass = NumpySummaryTaskConfig
30 _DefaultName = "numpySummaryTask"
32 def run(self, measurements, agg_name, package, metric):
33 agg = agg_name.lower()
34 if agg == "summary":
35 agg = self.config.summary
36 self.log.info(f"Computing the {agg} of {package}_{metric} values")
38 if len(measurements) == 0:
39 self.log.info('Recieved zero length measurments list. Returning NaN.')
40 # In the case of an empty list, there is nothing we can do other than
41 # to return a NaN
42 value = u.Quantity(np.nan)
43 else:
44 unit = measurements[0].quantity.unit
45 value = getattr(np, agg)(u.Quantity([x.quantity for x in measurements
46 if np.isfinite(x.quantity)]))
47 # Make sure return has same unit as inputs
48 # In some cases numpy can return a NaN and the unit gets dropped
49 value = value.value*unit
50 return Struct(measurement=Measurement(f"metricvalue_{agg_name.lower()}_{package}_{metric}", value))