B Нюq\Ау@sdZdgZGddДdГZdS)zj A simple class to manage a piece of global science state. See :ref:`config-developer` for more details. ┌ScienceStatec@s<eZdZdZddДZeddДГZeddДГZedd ДГZd 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 cCstdГВdS)Nz/This class is a singleton. Do not instantiate.)┌RuntimeError)┌selfйr·2lib/python3.7/site-packages/astropy/utils/state.py┌__init__szScienceState.__init__cCs|а|jбS)z6 Get the current science state value. )┌validate┌_value)┌clsrrr┌get#szScienceState.getcCs.GddДdГ}|||jГ}|а|б}||_|S)z6 Set the current science state value. c@s,eZdZddДZddДZddДZddДZd S) z"ScienceState.set.._ContextcSs||_||_dS)N)r┌_parent)r┌parent┌valuerrrr0sz+ScienceState.set.._Context.__init__cSsdS)Nr)rrrr┌ __enter__4sz,ScienceState.set.._Context.__enter__cSs|j|j_dS)N)rr)r┌typer ┌tbrrr┌__exit__7sz+ScienceState.set.._Context.__exit__cSsdа|jj|jjбS)Nz)┌formatr┌__name__r)rrrr┌__repr__:sz+ScienceState.set.._Context.__repr__N)r┌ __module__┌__qualname__rrrrrrrr┌_Context/sr)rr)r r rZctxrrr┌set*s zScienceState.setcCs|S)z] Validate the value and convert it to its native type, if necessary. r)r r rrrrCszScienceState.validateN) rrr┌__doc__r┌classmethodr rrrrrrr s N)r┌__all__rrrrr┌s