a ߙfbj@sdZdgZGdddZdS)zr A simple class to manage a piece of global science state. See :ref:`astropy:config-developer` for more details. ScienceStatec@s<eZdZdZddZeddZeddZedd Zd S) rab Science state subclasses are used to manage global items that can affect science results. Subclasses will generally override `validate` to convert from any of the acceptable inputs (such as strings) to the appropriate internal objects, and set an initial value to the ``_value`` member so it has a default. Examples -------- :: class MyState(ScienceState): @classmethod def validate(cls, value): if value not in ('A', 'B', 'C'): raise ValueError("Must be one of A, B, C") return value cCs tddS)Nz/This class is a singleton. Do not instantiate.) RuntimeErrorselfr2lib/python3.9/site-packages/astropy/utils/state.py__init__szScienceState.__init__cCs ||jS)z6 Get the current science state value. )validate_value)clsrrrget#szScienceState.getcCs.Gddd}|||j}||}||_|S)z6 Set the current science state value. c@s,eZdZddZddZddZddZd S) z"ScienceState.set.._ContextcSs||_||_dSNr _parent)rparentvaluerrrr0sz+ScienceState.set.._Context.__init__cSsdSr rrrrr __enter__4sz,ScienceState.set.._Context.__enter__cSs|j|j_dSr r )rtypertbrrr__exit__7sz+ScienceState.set.._Context.__exit__cSs:t|jjd\}}}|r$|d7}d|jjd|dS)N z...z)reprrr partition__name__)rZ value_reprZlb_rrr__repr__:sz+ScienceState.set.._Context.__repr__N)r __module__ __qualname__rrrrrrrr_Context/sr)r r)r rrctxrrrset*s   zScienceState.setcCs|S)z] Validate the value and convert it to its native type, if necessary. r)r rrrrrGszScienceState.validateN) rrr__doc__r classmethodr r rrrrrr s  N)r!__all__rrrrrs