Constraint_Single_Science

class jwst.associations.lib.rules_level2_base.Constraint_Single_Science(has_science_fn, exposure_type_fn, **sc_kwargs)

Bases: Constraint

Allow only single science exposure.

Parameters:

has_science_fnfunc

Function to determine whether the association has a science member already. No arguments are provided

exposure_type_fnfunc

Function to determine the association exposure type of the item. Should take a single argument of item.

**sc_kwargsdict

Keyword arguments to pass to the parent class Constraint.

Notes

The has_science_fn is further wrapped in a lambda function to provide a closure. Otherwise if the function is a bound method, that method may end up pointing to an instance that is not calling this constraint.