lsst.pipe.tasks.functors.CustomFunctor Class Reference

Inheritance diagram for lsst.pipe.tasks.functors.CustomFunctor:

Public Member Functions
	__init__ (self, expr, **kwargs)
	name (self)
	columns (self)

Public Attributes
	expr
	log

Protected Member Functions
	_func (self, df)

Static Protected Attributes
tuple	_ignore_words = ('mag', 'sin', 'cos', 'exp', 'log', 'sqrt')

Detailed Description

Arbitrary computation on a catalog.

Column names (and thus the columns to be loaded from catalog) are found by
finding all words and trying to ignore all "math-y" words.

Parameters
----------
expr : str
    Expression to evaluate, to be parsed and executed by
    `~lsst.pipe.tasks.functors.mag_aware_eval`.

Definition at line 602 of file functors.py.

Constructor & Destructor Documentation

__init__()

lsst.pipe.tasks.functors.CustomFunctor.__init__	(		self,
			expr,
		**	kwargs )

Reimplemented from lsst.pipe.tasks.functors.Functor.

Definition at line 616 of file functors.py.

    def __init__(self, expr, **kwargs):
        self.expr = expr
        super().__init__(**kwargs)
 

Member Function Documentation

_func()

lsst.pipe.tasks.functors.CustomFunctor._func ( self, df )

protected

Reimplemented from lsst.pipe.tasks.functors.Functor.

Definition at line 639 of file functors.py.

    def _func(self, df):
        return mag_aware_eval(df, self.expr, self.log)
 
 

columns()

lsst.pipe.tasks.functors.CustomFunctor.columns

(

self

)

Columns required to perform calculation.

Reimplemented from lsst.pipe.tasks.functors.Functor.

Definition at line 625 of file functors.py.

    def columns(self):
        flux_cols = re.findall(r'mag\‍(\s*(\w+)\s*\‍)', self.expr)
 
        cols = [c for c in re.findall(r'[a-zA-Z_]+', self.expr) if c not in self._ignore_words]
        not_a_col = []
        for c in flux_cols:
            if not re.search('_instFlux$', c):
                cols.append(f'{c}_instFlux')
                not_a_col.append(c)
            else:
                cols.append(c)
 
        return list(set([c for c in cols if c not in not_a_col]))
 

name()

lsst.pipe.tasks.functors.CustomFunctor.name

(

self

)

Reimplemented from lsst.pipe.tasks.functors.Functor.

Definition at line 621 of file functors.py.

    def name(self):
        return self.expr
 

Member Data Documentation

_ignore_words

tuple lsst.pipe.tasks.functors.CustomFunctor._ignore_words = ('mag', 'sin', 'cos', 'exp', 'log', 'sqrt')

staticprotected

Definition at line 614 of file functors.py.

expr

lsst.pipe.tasks.functors.CustomFunctor.expr

Definition at line 617 of file functors.py.

log

lsst.pipe.tasks.functors.CustomFunctor.log

Definition at line 640 of file functors.py.

---

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

• /j/snowflake/release/lsstsw/stack/lsst-scipipe-8.0.0/Linux64/pipe_tasks/gc07e1c2157+a98bf949bb/python/lsst/pipe/tasks/functors.py