bik 2ddlmZddlmZGddeZy))settings) Reductionc^eZdZdZd d fd ZdZdefdZdZde fdZ d de fd Z d Z xZ S)ChainzA logical grouping of multiple reductions into a single reduction. Attributes ---------- reductions : list[Reduction] A list of reductions. returncPtt| ||g|_y||_y)N)problem)superr__init__ reductions)selfr r __class__s Q/home/cdr/jupyterlab/.venv/lib/python3.12/site-packages/cvxpy/reductions/chain.pyr zChain.__init__s' eT#G#4 * 2" c,t|jSN)strr r s r__str__z Chain.__str__s4??##rc2dt|jzS)NzChain(reductions=%s))reprr rs r__repr__zChain.__repr__s%T__(===rcP|jD]}t||s|cStr)r isinstanceKeyError)r reduction_type reductions rgetz Chain.gets, !I)^4   !rct|jD])}|j|sy|j|\}}+y)aA problem is accepted if the sequence of reductions is valid. In particular, the i-th reduction must accept the output of the i-1th reduction, with the first reduction (self.reductions[0]) in the sequence taking as input the supplied problem. Parameters ---------- problem : Problem The problem to check. Returns ------- bool True if the chain can be applied, False otherwise. FT)r acceptsapply)r r r_s rr z Chain.acceptss=$ *A99W%)JGQ *rverbosecg}|jD]\}|r3tjjdt |j |j |\}}|j|^||fS)aApplies the chain to a problem and returns an equivalent problem. Parameters ---------- problem : Problem The problem to which the chain will be applied. verbose : bool, optional Whehter to print verbose output. Returns ------- Problem or dict The problem yielded by applying the reductions in sequence, starting at self.reductions[0]. list The inverse data yielded by each of the reductions. zApplying reduction %s)r sLOGGERinfotype__name__r!append)r r r$ inverse_datar"invs rr!z Chain.apply6si$  %A 5tAw7G7GH777+LGS    $  %  $$rcttt|j|D]\}}|j ||}|S)zKReturns a solution to the original problem given the inverse_data. )reversedlistzipr invert)r solutionr,r"r-s rr2z Chain.invertPsAtC$FGH /FAsxx#.H /r)NN)rN)F)r* __module__ __qualname____doc__r rrrrboolr r!r2 __classcell__)rs@rrrsAC$>#> $0%d%4rrN)cvxpyrr&cvxpy.reductions.reductionrrrrr<s0PIPr