σ šίΘ[c@s)dZdgZdefd„ƒYZdS(sj A simple class to manage a piece of global science state. See :ref:`config-developer` for more details. t ScienceStatecBsDeZdZd„Zed„ƒZed„ƒZed„ƒZRS(sb 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 cCstdƒ‚dS(Ns/This class is a singleton. Do not instantiate.(t RuntimeError(tself((s2lib/python2.7/site-packages/astropy/utils/state.pyt__init__scCs|j|jƒS(s6 Get the current science state value. (tvalidatet_value(tcls((s2lib/python2.7/site-packages/astropy/utils/state.pytget#scCsDdtfd„ƒY}|||jƒ}|j|ƒ}||_|S(s6 Set the current science state value. t_ContextcBs,eZd„Zd„Zd„Zd„ZRS(cSs||_||_dS(N(Rt_parent(Rtparenttvalue((s2lib/python2.7/site-packages/astropy/utils/state.pyR0s cSsdS(N((R((s2lib/python2.7/site-packages/astropy/utils/state.pyt __enter__4scSs|j|j_dS(N(RR (RttypeR ttb((s2lib/python2.7/site-packages/astropy/utils/state.pyt__exit__7scSsdj|jj|jjƒS(Ns(tformatR t__name__R(R((s2lib/python2.7/site-packages/astropy/utils/state.pyt__repr__:s(Rt __module__RR RR(((s2lib/python2.7/site-packages/astropy/utils/state.pyR/s   (tobjectRR(RR Rtctx((s2lib/python2.7/site-packages/astropy/utils/state.pytset*s  cCs|S(s] Validate the value and convert it to its native type, if necessary. ((RR ((s2lib/python2.7/site-packages/astropy/utils/state.pyRCs(RRt__doc__Rt classmethodRRR(((s2lib/python2.7/site-packages/astropy/utils/state.pyR s  N(Rt__all__RR(((s2lib/python2.7/site-packages/astropy/utils/state.pyts